Abstract

The present application disclose a device for preparing rock samples with different moisture contents, which comprises a sample container, wherein two ends of the rock sample are respectively connected with a first steam inlet and a first steam outlet of the sample container; the first steam outlet, a pump and a gas-liquid separator are connected in sequence, a gas outlet end of the gas-liquid separator, a steam compressor and the first steam inlet are connected in sequence, and a liquid outlet end of the gas-liquid separator, a steam generator and the steam compressor are connected in sequence. The water vapor in the sample container is pumped into the gas-liquid separator by the pump to separate low-temperature water vapor and condensate, and the low-temperature water vapor and condensate form high-temperature and high-pressure steam again and return to the inside of the sample container. The water in the steam generator always circulates inside the preparation device. The measuring instrument measures the reduction of the water in the steam generator, and subtracts the pre-recorded reduction of the water in the steam generator when the preparation device is idling, so as to obtain the water amount of the rock sample, and then calculate the moisture content of the rock sample.

IPC Classes  ?

• G01N 1/28 - Preparing specimens for investigation

Abstract

The present application discloses a calibration method for a logging-while-drilling device, which is used for measuring data on the sea level and comprises the following steps: horizontally suspending the logging-while-drilling device; measuring amplitudes and phases at different heights; horizontally rotating the logging-while-drilling device for multiple times, and measuring amplitudes and phases at different heights after each horizontal rotation; and when the sum of angles of the multiple horizontal rotations is greater than 360 degrees, calculating an azimuth correction factor according to the measured amplitudes and phases. As the calibration method for the logging-while-drilling device according to the present application is carried out on a wide seawater interface, the influence of the boundary effect can be eliminated; the uniform medium attributes of air and seawater can be simplified into a one-dimensional double-layer medium model.

IPC Classes  ?

• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• G01V 1/30 - Analysis
• G01V 1/40 - SeismologySeismic or acoustic prospecting or detecting specially adapted for well-logging

Abstract

A sand shale formation lithology evaluation method and system for precise deep oil and gas navigation aims to solve the problem in the prior art, that is, the accuracy of the logging-while-drilling (LWD) azimuthal resistivity is insufficient due to an equipment or technology deficiency. The method includes: acquiring density distribution data, gamma distribution data, and resistivity distribution data of a target location; amplifying the data to acquire amplified logging distribution data; clustering the data to acquire clustered logging data; adding stratigraphic information to the clustered data; performing dimensionality reduction by a principal component analysis (PCA) method, and taking dimensionality-reduced data as a weight of azimuthal logging data to acquire an LWD feature dataset; predicting missing LWD photoelectric data through the LWD feature dataset; and acquiring a formation lithology evaluation result based on an LWD photoelectric data prediction curve. The method and system improves the accuracy of LWD lithology evaluation.

IPC Classes  ?

• G01V 11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups

Abstract

A sand shale formation physical property evaluation method and system for precise deep oil and gas navigation aims to solve the problem that the prior art cannot acquire a real-time and accurate logging-while-drilling (LWD) Rt curve. The method includes: acquiring basic data of a target well location as well as basic data and an LWD resistivity (Rt) of an adjacent well; dividing the data into different groups; retaining data with a maximum correlation value with the LWD Rt in each group of data; eliminating outliers, and performing standardization; constructing a two-dimensional input feature map by taking the correlation value and standardized data as a weight; acquiring an LWD Rt prediction curve based on the two-dimensional input feature map; calculating a hydrocarbon parameter in a window based on the LWD Rt prediction curve; and locating an area with a high hydrocarbon potential based on the hydrocarbon parameter at each position.

IPC Classes  ?

• G01V 3/20 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with propagation of electric current
• G01V 11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups

Abstract

The present disclosure relates to a high-precision automatic weighing device for powder samples, including a three-dimensional moving track and a working area, wherein the three-dimensional moving track includes a horizontal length track, a vertical track and a horizontal width track, the vertical track being slidingly connected to the horizontal length track, the horizontal width track being slidingly connected to the vertical track; the horizontal length track is arranged on one side of the working area, and a cleaning area, a sample storage area and a weighing area are provided in sequence along the horizontal length track within the working area; a series of slideways are connected to a mechanical claw for grabbing a sample tube in the sample storage area, a fine-tuning sample releasing mechanism to release samples in trace amounts, a sample head clamping part for mounting or dismounting of a sample head, and a sample loosening pestle.

IPC Classes  ?

• G01G 13/00 - Weighing apparatus with automatic feed or discharge for weighing-out batches of material
• B08B 3/02 - Cleaning by the force of jets or sprays
• B08B 9/032 - Cleaning the internal surfacesRemoval of blockages by the mechanical action of a moving fluid, e.g. by flushing
• G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapersMeasuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes

Abstract

The present disclosure provides a phase-controlled excitation downhole nuclear magnetic resonance imaging device and method which relate to the technical fields of downhole nuclear magnetic resonance imaging devices and methods, and achieve high-resolution imaging for an underground target by utilizing a plurality of array antenna units and a phase-controlled array technology. The array antenna units are uniformly arranged around an array antenna frame, and each antenna unit is capable of achieving independent transmission and collection. A transmission phase of each antenna unit is controlled by adopting a phase control technology, the positioning excitation of a transmission pulse is achieved according to a co-phase stacking principle, and thus, the imaging resolution is further improved. The present disclosure has the advantages of high resolution and high efficiency and is suitable for the field of underground exploration. The application of this method will provide a more accurate and reliable imaging result for underground exploration and provide an important technical support for resource exploration and development.

IPC Classes  ?

• G01V 3/32 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance
• G01R 33/36 - Electrical details, e.g. matching or coupling of the coil to the receiver

Abstract

Disclosed are a calibration method, an apparatus and a system of a look-ahead logging while drilling measuring device. The calibration method includes: setting the distance from the look-ahead logging while drilling measuring device to a reflective interface as a first preset distance, and measuring the amplitude and phase of a signal received at the distance to obtain a first standard blank data; descending the look-ahead logging while drilling measuring device by a second preset distance a plurality of times, and measuring the amplitude and phase of the received signal after each descent of the second preset distance, respectively to obtain measurement results; re-setting the distance from the look-ahead logging while drilling measuring device to the reflective interface as the first preset distance, and measuring the amplitude and phase of a signal received at the distance to obtain a second standard blank data.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups

Abstract

The disclosure discloses a method for calibrating a mass discrimination effect of a neon isotope ratio, belonging to a field of isotope measurement. The following steps are provided: providing N kinds of standard gases with different gas semaphores, and respectively testing 20Ne and 22Ne in the N kinds of standard gases (air) by using a mass spectrometer to obtain N data sets; obtaining a functional equation (20Ne/22Ne)air=20Ne/22Ne=A(22Ne)+B from the N data sets by a mathematical fitting method; providing a test sample, and testing 20Nesample and 22Nesample in the sample by a mass spectrometer; making 22Ne equal to 22Nesample, obtaining a functional equation (20Ne/22Ne)air(sample)=A(22Nesample)+B; obtaining a mass discrimination factor according to D=(20Ne/22Ne)air(sample)/(20Ne/22Ne)standard; obtaining a real value of the sample according to (20Ne/22Ne)sample real=(20Nesample/22Nesample)/D.

IPC Classes  ?

• H01J 49/00 - Particle spectrometers or separator tubes

Abstract

Disclosed is a mapping method of landslide threat range based on equivalent friction coefficient and trend analysis, which includes the following steps: obtaining physical parameters of a landslide, and obtaining a volume of the landslide according to an area in the physical parameters; selecting relevant parameters based on a rock type in the physical parameters, and obtaining the equivalent friction coefficient according to the relevant parameters and the volume; obtaining a landslide runout distance according to the equivalent friction coefficient, determining coordinate points of a hyperbola and a front edge boundary range according to the landslide runout distance, and performing a hyperbolic fitting on two side boundaries of the landslide according to the coordinate points to obtain a side boundary range; generating the landslide threat range based on the front edge boundary range and the side boundary range.

IPC Classes  ?

• G01V 20/00 - Geomodelling in general

Abstract

The disclosure provides a test device and a test method for isotope measurement of noble gases in lunar soil. The testing device includes a carbon dioxide laser ultra-high vacuum sample melting system, zirconium-aluminum getters, a vacuum dry pump, a first molecular pump, a second molecular pump, a neon gas capture unit, an argon gas capture unit, an argon krypton-xenon capture unit, a dilution tank, a sputtering ion pump and a noble gas mass spectrometer which are connected through pipelines, and each pipeline and each component are connected through a specific way; in addition, control valves for controlling the opening and closing of the pipelines are installed on the connection path between each pipeline and each component, and the disclosure also provides a matching test method.

IPC Classes  ?

• G01N 21/74 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flameless atomising, e.g. graphite furnaces
• G01N 1/40 - Concentrating samples
• H01J 49/00 - Particle spectrometers or separator tubes
• H01J 49/04 - Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locksArrangements for external adjustment of electron- or ion-optical components
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups

Abstract

The present invention discloses an automatic identification method and device for planetary seismograph azimuth angles based on a planetary sundial, comprising: obtaining geographical coordinates of a sundial needle tip and a sundial needle tip shadow relative to a planetary surface; determining a theoretical second solar ray elevation angle and a ray azimuth angle; constructing an objective function according to a first solar ray elevation angle and a ray azimuth angle corresponding to a time for obtaining the sundial needle tip shadow; and taking a minimum objective function as a target for solving a planetary seismograph azimuth angle. The present invention determines the planetary seismograph azimuth angle only by optical photos of a planetary rover or a lander without active vibration devices on supporting legs of the lander, thereby reducing system complexity and reducing weight, volume and power consumption brought by additional devices on the supporting legs of the lander.

IPC Classes  ?

• G01C 1/00 - Measuring angles
• G04B 49/02 - Sundials

Abstract

The present invention is in the field of geological exploration and particularly relates to a method and system for gamma ray (GR) while drilling parameter data optimization for deep-filed oil and gas precise navigation, aiming to solve the problem of insufficient measurement accuracy of the depth of a well in the existing drilling technology. The present invention comprises: eliminating outliers from the obtained GR while drilling parameter data and determining the rationality of the eliminated outlier; performing derivation on a real-time updated variance attribute while drilling curve to obtain a real-time updated formation change-point detection result; searching the formation change-point detection result of a pre-drilling predicted well curve; and correcting the drilling depth by comparing the two formation change-point detection results to obtain the accurate depth while drilling.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
• E21B 7/04 - Directional drilling
• E21B 47/022 - Determining slope or direction of the borehole, e.g. using geomagnetism
• E21B 47/04 - Measuring depth or liquid level
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• G01V 5/04 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging

Abstract

The present disclosure discloses a solving method and system for an Euler angle attitude. The solving method includes: acquiring a rough rotation angle ΔT of a tool surface of a drilling tool in a search interval; performing calculation according to the rough rotation angle ΔT to obtain a variation range RangeT of the tool surface; disposing a plurality of particles within the variation range RangeT, corresponding position coordinates of the particles to an Euler angle value, randomly generating initial speeds of the particles, calculating a fitness function of each particle, and selecting the particle with the minimum fitness function as an optimal particle; updating a speed and a position of each particle, and gradually moving the particles closer to an optimal position by adopting an iteration method; and after performing n iterations until the precision of the fitness function of the optimal particle reaches a threshold.

IPC Classes  ?

• E21B 47/024 - Determining slope or direction of devices in the borehole
• G01B 21/22 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapersMeasuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for testing the alignment of axes

Abstract

The present invention belongs to the field of deep navigation, and in particular to a high-precision modeling method and system of three-dimensional velocity field for precise navigation of deep oil and gas. The present invention includes: extracting wave impedance characteristics based on standardized well logging data to obtain a wave impedance curve; acquiring a velocity vector of each location at current depth, to obtain a one-dimensional velocity curve; based on the one-dimensional velocity curve, training a velocity value prediction model based on wave impedance at the current depth; performing wave impedance inversion based on the wave impedance curve at the current depth to obtain a wave impedance inversion data volume; and based on the wave impedance inversion data volume, through the velocity value prediction model based on wave impedance at the current depth, acquiring a three-dimensional high-accuracy velocity volume.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G01V 1/30 - Analysis

Abstract

The present invention belongs to the field of geologic survey, and particularly relates to a real-time calibration method and system of acoustic logging data while drilling for precise navigation of deep oil and gas, aiming to solve a problem of inability to automatically identify stratum boundaries to adapt to geology at various different depths in an existing drilling process. The method of the present invention includes: acquiring standardized acoustic parameter data while drilling; acquiring time-depth relationship of historical acoustic curve data of drilled wells, and current actual drilling time-depth relationship; performing interpolation based on the current actual drilling time-depth relationship, to acquire interpolated current actual drilling time-depth relationship; correcting the interpolated current actual drilling time-depth relationship; and completing current precise depth correction based on the current actual drilling acoustic curve.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups
• G01V 1/50 - Analysing data

Abstract

A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 of the reference material 1, correcting the correlation by reference material 2; calculating the lead-uranium mass ratio A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 of the reference material 1, correcting the correlation by reference material 2; calculating the lead-uranium mass ratio ( 206 Pb 238 U ) un A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 of the reference material 1, correcting the correlation by reference material 2; calculating the lead-uranium mass ratio ( 206 Pb 238 U ) un of the columbite-tantalite sample to be tested by using the corrected correlation; finally, determining the uranium-lead age UPbtun of the columbite-tantalite sample to be tested based on the lead-uranium mass ratio A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 of the reference material 1, correcting the correlation by reference material 2; calculating the lead-uranium mass ratio ( 206 Pb 238 U ) un of the columbite-tantalite sample to be tested by using the corrected correlation; finally, determining the uranium-lead age UPbtun of the columbite-tantalite sample to be tested based on the lead-uranium mass ratio ( 206 Pb 238 U ) un . A method for accurately correcting the age of columbite-tantalite by using double-reference-material includes: using at least two kinds of columbite-tantalite with known ages as reference materials; determining the positive correlation between the lead-uranium ion ratio and the uranium ion ratio of the columbite-tantalite based on test results of a lead-uranium ion ratio ( 206 Pb + 238 U 16 ⁢ O + ) Cstd ⁢ 1 and a uranium ion ratio ( 238 U 16 ⁢ O 2 + 238 U 16 ⁢ O + ) Cstd ⁢ 1 of the reference material 1, correcting the correlation by reference material 2; calculating the lead-uranium mass ratio ( 206 Pb 238 U ) un of the columbite-tantalite sample to be tested by using the corrected correlation; finally, determining the uranium-lead age UPbtun of the columbite-tantalite sample to be tested based on the lead-uranium mass ratio ( 206 Pb 238 U ) un . The method is fast and reliable, and greatly increases the accuracy in calculating the age of columbite-tantalite, and the method represents the latest international test design and calibration method in this field, and is of great practical value.

IPC Classes  ?

• G01N 23/2258 - Measuring secondary ion emission, e.g. secondary ion mass spectrometry [SIMS]
• G01N 33/24 - Earth materials
• H01J 49/00 - Particle spectrometers or separator tubes
• H01J 49/04 - Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locksArrangements for external adjustment of electron- or ion-optical components
• H01J 49/14 - Ion sourcesIon guns using particle bombardment, e.g. ionisation chambers

Abstract

The application provides an estimation method of detecting elevation by a semi-airborne electromagnetic method, including the following steps: S1, judging original elevation data to obtain wrong point data and normal data; S2, filtering the wrong point data by an improved Kalman filtering method, and filtering the normal data by a conventional Kalman filtering method; S3, fusing a filtering result of the wrong point data and a filtering result of the normal data, and taking a fused result as a measured value sequence used in a next working process; and S4, repeating the S1-S3 until the fused result meets preset requirements.

IPC Classes  ?

• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
• G01V 3/12 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with electromagnetic waves

Abstract

A precise deep oil and gas navigation system based on structural evaluation of a sand/shale formation, and a device are provided. The precise deep oil and gas navigation system is implemented by: acquiring basic data of a target well location as well as basic data and an acoustic LWD curve of an adjacent well; dividing a basic data group; retaining extremely strongly correlated data and strongly correlated data of the basic data group, and performing dimensionality reduction; constructing a three-dimensional fusion feature data volume based on a dimensionality-reduced fusion feature parameter and a time-frequency spectrum; predicting a missing curve according to the three-dimensional fusion feature data volume; and correcting a stratigraphic structure model based on the missing curve to guide the design of a drilling trajectory.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• G01V 11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups
• G06F 30/28 - Design optimisation, verification or simulation using fluid dynamics, e.g. using Navier-Stokes equations or computational fluid dynamics [CFD]

Abstract

A multifunctional and visual rock triaxial testing system is provided. The multifunctional and visual rock triaxial testing system includes an axial loading system, a high-energy accelerator computerized tomography (CT) scanning system, a turntable system, a triaxial pressure cell, a fluid fracturing pump, a temperature pump, a confining pressure loading pump, a power oil source, and an integrated control console, where the turntable system is configured to drive the high-energy accelerator CT scanning system to rotate, so as to scan an internal structure of a rock sample; and the triaxial pressure cell and the fluid fracturing pump are configured to conduct compression and fracturing tests on the rock sample, respectively.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
• G01N 33/24 - Earth materials

Abstract

The present disclosure relates to a method and a system for updating a three-dimensional lithology model for precision navigation of deep oil and gas in real time, aiming to solve the problem that an existing while drilling model is difficult to adapt to a real-time update of the model in a strong heterogeneous reservoir, which leads to a decrease in accuracy of an established prediction model and a lack of a drilling ratio. The present disclosure includes: dividing pre-processed seismic data into three pieces of single-frequency seismic waveform data by a wavelet frequency division method; selecting an optimal single-frequency combination according to a correlation coefficient between gamma ray prediction curves and measured curves at different depths; and computing a single-frequency gamma ray prediction model while drilling, updated with drilling, and a full-band gamma ray distribution model while drilling, updated with drilling, by means of the optimal single-frequency combination.

IPC Classes  ?

• G06T 17/05 - Geographic models
• E21B 43/16 - Enhanced recovery methods for obtaining hydrocarbons

Abstract

The present disclosure relates to the technical field of acoustic detection while drilling, in particular to a method and a device for identifying near-bit lithology based on intelligent voiceprint identification, including acquiring rock sound data; pre-processing the acquired rock sound data; extracting voiceprint features of pretreated rock sounds; establishing a rock voiceprint feature database; training the intelligent voiceprint identification algorithms according to the lithology labels and voiceprint feature data in the rock voiceprint feature database; intelligently identifying or predicting the rock voiceprint features using the intelligent voiceprint identification algorithms and outputting the lithology identification results. The present disclosure can greatly enhance the real-time availability and accuracy of obtaining near-bit stratum lithology data in-site, which can effectively improve the reservoir drilling rate and timely avoid drilling risks.

IPC Classes  ?

• E21B 47/14 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

A physical simulation test system for studying a tunnel structure under active fault movements includes: a simulation box, a loading frame, a first loading mechanism, a second loading mechanism and a third loading mechanism. The simulation box is a hollow and open box structure including a first box and a second box that can slide relative to each other. The loading frame includes a crossbeam, a first bracket, a second bracket, and a third bracket. The simulation box is located below the crossbeam, between the first bracket and the second bracket, and in front of the third bracket. The first loading mechanism is disposed on the first bracket, the second loading mechanism is located below the first box, and the third loading mechanism is disposed on the third bracket. The three loading mechanisms are configured to provide loading forces in three different directions to the first box.

IPC Classes  ?

• G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces

Abstract

Provided are a method and a device for mobile rapid exploration of mineral resources. The device includes a main magnetic sensor, a slave magnetic sensor and a ground vertical magnetic field sensor arranged in a ground reference station. During exploration, on the one hand, a semi-airborne artificial source exploration method is used to collect signals with the main magnetic sensor and the slave magnetic sensor, in which the slave magnetic sensor collects low-frequency motion noise, and the main magnetic sensor collects low-frequency motion noise and vertical magnetic field signals synchronously. On the other hand, vertical magnetic field signals in a same survey area are collected by the ground vertical magnetic field sensor, and then the low-frequency motion noise collected by the main magnetic sensor is estimated twice through two correlation mappings, so as to obtain a final vertical magnetic field measurement signal.

IPC Classes  ?

• G01V 3/16 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for use during transport, e.g. by a person, vehicle or boat specially adapted for use from aircraft
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

A density inversion method comprises acquiring local gravity anomalies of a target body to be measured at many measurement points within a target measurement area; acquiring information of distance between a center position of an area the target body being located and a specified boundary of the target measurement area; determining a target inversion depth to be used in density inversion for the target body based on the information of distance and the specified depth; and substituting the local gravity anomaly of the target body at each measurement point and the target inversion depth into a preset layer density inversion formula which is a transform formula of a density inversion formula in the case of a constant density in a longitudinal cross-section, to obtain a density distribution of the target body in a transverse cross-section. The accuracy of the density distribution obtained through the density inversion can be improved.

IPC Classes  ?

• G01V 7/06 - Analysis or interpretation of gravimetric records

Abstract

A pose calibration method for an aerospace magnetometer includes the following steps: mounting a magnetometer and a camera on a vehicle body; in the ground state, completely expanding a stretching rod mounted on the vehicle body, and taking photos from multiple angles by the camera in the Earth's full gravity mode; in the near-moon gravity mode, taking photos from multiple angles by the camera; comparing the photos in the Earth's full gravity mode and the near-moon gravity mode to obtain a reference database; and repeating S2 and S3 in an on-orbit state, and comparing the photographing result with the reference database to obtain a length and an angle of the stretching rod. According to the pose calibration method, the photographed structure in the on-orbit state is compared with the reference database to obtain the length and the angle of the stretching rod.

IPC Classes  ?

• G01C 25/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
• G01C 21/08 - NavigationNavigational instruments not provided for in groups by terrestrial means involving use of the magnetic field of the earth

Abstract

A ground receiving front-end compensation system for intelligent guide drilling borehole-ground electromagnetic transmission is provided, and includes a ground sensing module located below the underground wellhead, a ground system located between the underground wellhead and the measuring electrode, a measuring electrode and a compensation electrode; the ground system, the measuring electrode and the compensation electrode are located at the same side of the underground wellhead, a measuring electrode spacing (a first preset distance) is a distance from the underground wellhead to the measuring electrode; a compensation electrode spacing (a second preset distance) is a distance from the underground wellhead to the compensation electrode, the second preset distance is greater than the first preset distance; an induction signal of the ground sensing module enters the ground system, and the ground system outputs compensation current based on the induction signal, and compensates the measuring signal based on the compensation current.

IPC Classes  ?

• G01V 3/28 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
• E21B 47/13 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. of radio frequency range

Abstract

Disclosed are density determination method, apparatuses, and electronic device, applied in geophysical exploration, comprising: acquiring Bouguer gravity anomalies at measurement points for a target body to be measured; determining a Bouguer gravity anomaly of the target body for each measurement point as a first anomaly based on the Bouguer gravity anomalies at the measurement points, and determining a Bouguer gravity anomaly of a reference body corresponding to the target body to be measured at the measurement point as a second anomaly at the measurement point, based on the Bouguer gravity anomalies at the measurement points; calculating a difference between the first anomaly and the second anomaly at the measurement point as a local gravity anomaly; and performing density inversion on the target body to be measured to obtain density distribution in transverse cross-section of the target body, thereby obtaining the density of the target body more accurately.

IPC Classes  ?

• G01V 7/00 - Measuring gravitational fields or wavesGravimetric prospecting or detecting
• G01N 9/00 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity

Abstract

Disclosed in the present invention are an apparent resistivity measurement system and method using a semi-airborne electromagnetic method. The system comprises: a magnetic field sensor, used for acquiring magnetic field response data; an electric field sensor, used for acquiring electric field response data; and a processor, the magnetic field sensor and the electric field sensor each being connected to the processor, and the processor being used for calculating a tipper according to the magnetic field response data, calculating impedance, Cannia apparent resistivity, and fitting apparent resistivity according to the magnetic field response data and the electric field response data, and performing inversion according to one or more of the tipper, the fitting apparent resistivity, the impedance, and the Cannia apparent resistivity to obtain subsurface resistivity. According to the apparent resistivity measurement system using a semi-airborne electromagnetic method of the present invention, an electric field is introduced, and the influence of an emission field source is eliminated by means of the ratio of an electromagnetic field, thereby improving interpretation precision; on the system, the signal-to-noise ratio of the system is improved by measuring electric and magnetic field signals in the horizontal direction which have stronger signal strength and slower attenuation along with a transceiving distance, and the detection range and the detection depth can be effectively expanded.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

A rock true-triaxial testing system based on computerized tomography (CT) scanning aims to solve problems in the prior art, that is, the rigidity of the frame in the testing system is insufficient; high-pressure lines, wires, and signal lines are entangled when rotating; and the reaction frame and loading actuators obstruct the ray. The rock true-triaxial testing system includes a true-triaxial loading system and a high-energy accelerator-based CT scanning system, where the high-energy accelerator-based CT scanning system is located inside the true-triaxial loading system, and the high-energy accelerator-based CT scanning system is configured to image an internal structure of a cubic rock sample and continuously apply a stress to the cubic rock sample through a plurality of piston extension rods in the true-triaxial loading system. The rock true-triaxial testing system reduces radiation attenuation, and ensures imaging quality and a stable and smooth loading process.

IPC Classes  ?

• G01N 3/12 - Pressure-testing
• G01N 3/02 - Investigating strength properties of solid materials by application of mechanical stress Details
• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
• G01N 33/24 - Earth materials

Abstract

Disclosed in the present disclosure are an apparent resistivity measuring system and method using a semi-airborne electromagnetic method. The system includes: a magnetic field sensor for acquiring magnetic field response data; an electric field sensor for acquiring electric field response data; and a processor, where the magnetic field sensor and the electric field sensor each are connected to the processor, and the processor is configured to perform calculation to obtain tippers according to the magnetic field response data, perform calculation to obtain impedance, Cagniard apparent resistivity and fitted apparent resistivity according to the magnetic field response data and the electric field response data, and perform inversion according to one or more kinds of data of the tippers, the fitted apparent resistivity, the impedance and the Cagniard apparent resistivity to obtain underground resistivity.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

The present application proposes an airborne electromagnetic signal observation device and a system carried by an unmanned aerial vehicle (UAV). The device includes an inner frame, an outer frame and a flexible support that are connected to each other. The device and the system can enhance the stability of the sensor in flight and greatly suppress motion noise.

IPC Classes  ?

• B64U 20/80 - Arrangement of on-board electronics, e.g. avionics systems or wiring
• G01R 31/08 - Locating faults in cables, transmission lines, or networks
• H04B 3/46 - MonitoringTesting
• B64U 101/00 - UAVs specially adapted for particular uses or applications

Abstract

The present invention pertains to the technical field of aeromagnetic survey, and specifically pertains to a storage device for a data analyzer for aerospace magnetic field measurement, which comprises a storage box body, a moving structure for facilitating movement is connected to the storage box body, a shielding structure for shielding sunlight is connected to the storage box body, an accommodating structure for accommodating an article is connected to the storage box body, a support structure for supporting is connected to the accommodating structure, and a placing structure for placing is connected to the storage box body.

IPC Classes  ?

• A45C 15/00 - Purses, bags, luggage or other receptacles covered by groups , combined with other articles
• A45C 5/06 - Rigid or semi-rigid luggage with outside compartments
• A45C 5/14 - Rigid or semi-rigid luggage with built-in rolling means
• A45C 13/00 - PURSESLUGGAGEHAND CARRIED BAGS DetailsAccessories
• A45C 13/02 - Interior fittingsMeans for holding or packing articles

Abstract

A noise reduction measurement method of acoustic while drilling data based on signal synchronization is provided. The method performs pre-sampling before effective excitation of a low-frequency pulser, then extracts center frequency and phase information of noise of the low-frequency pulser by fast Fourier transform, and adjusts the excitation and sampling time of the acoustic signal according to the center frequency and phase information of the noise of the low-frequency pulser. Accordingly, the coincidence of the acoustic signal excited by the acoustic instrument and the acoustic signal generated by operation excitation of the pulser can be actively avoided, and the signal-to-noise ratio of the received signal of the acoustic instrument can be effectively improved.

IPC Classes  ?

• G01V 1/50 - Analysing data

Abstract

The present disclosure provides a method and device for synchronizing azimuth detection data while drilling. The method includes: starting, by a control module, according to a command that measurement has been started sent by a tool face angle measurement module, a timer to record a first time, and sending, by the control module, a detection signal acquisition starting command to a detection signal acquisition module; performing, by the detection signal acquisition module, a parameter configuration according to the detection signal acquisition starting command, and sending, by the detection signal acquisition module, a command that work has been started to the control module based on a configuration completion state; stopping the timer and recording a second time by the control module according to the command that work has been started.

IPC Classes  ?

• E21B 47/022 - Determining slope or direction of the borehole, e.g. using geomagnetism

Abstract

The present application discloses a carrier wave distortion compensation method for an MWD mud continuous wave system, comprising: in the downhole, modulating the carrier wave according to the transmission data to obtain a mud continuous wave signal to be transmitted; transmitting the mud continuous wave signal to the ground via a mud channel; denoising the received pressure signal on the ground to obtain a denoised mud continuous wave signal; performing subsequent processing on the denoised mud continuous wave signal to obtain the final transmission data; and performing downhole distortion compensation before modulating the carrier wave or performing ground distortion compensation on the denoised mud continuous wave signal before performing subsequent processing. The present application reduces the bit error rate of the MWD mud continuous wave system by performing waveform distortion compensation prior to downhole modulation or during performing signal processing on the ground.

IPC Classes  ?

• G01V 1/36 - Effecting static or dynamic corrections on records, e.g. correcting spreadCorrelating seismic signalsEliminating effects of unwanted energy
• G01V 1/22 - Transmitting seismic signals to recording or processing apparatus

Abstract

A freely-combinable multifunctional ocean-bottom seismic detection device includes a cabin body having a sealed structure and is made of a titanium alloy. A hydrophone, a first power interface, and a signal transmission sealing connector are mounted on an upper flange. A digital collector, a broadband seismometer, a global positioning system (GPS), and an electronic compass are mounted in the cabin body. The broadband seismometer is mounted on a leveling mechanism. Rechargeable lithium batteries are mounted in sealed battery compartments. A settlement coupling frame is arranged below the cabin body and is detachably connected to the cabin body. An uncoupling mechanism is mounted at a top of the cabin body. The device has a synchronous arrangement function of deployment as an independent node with data stored inside the instrument, and quick integration into a seabed foundation (or a subsurface buoy) with real-time data transmission.

IPC Classes  ?

• G01V 1/18 - Receiving elements, e.g. seismometer, geophone
• G01V 1/16 - Receiving elements for seismic signalsArrangements or adaptations of receiving elements
• G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas

Abstract

A method and system for real-time calculating a microseismic focal mechanism based on deep learning is provided, which belongs to the technical field of microseismic monitoring. The method includes: creating a training dataset, the training data including simulated DAS microseismic strain data and a focal mechanism corresponding to the simulated DAS microseismic strain data; training a focal mechanism calculation model by using the training dataset, with the simulated DAS microseismic strain data as an input and the focal mechanism corresponding to the simulated DAS microseismic strain data as a target output, so as to obtain a trained focal mechanism calculation model; collecting DAS microseismic strain data by a surface and downhole DAS acquisition system; performing preprocess operations such as removing abnormally large values on the DAS microseismic strain data; inputting the preprocessed DAS microseismic strain data into a trained focal mechanism calculation model to obtain a focal mechanism.

IPC Classes  ?

• G01V 1/50 - Analysing data
• G01V 1/46 - Data acquisition
• G06N 3/0464 - Convolutional networks [CNN, ConvNet]

Abstract

The invention discloses a method for improving the calibration efficiency of an accelerometer, comprising the following steps: S100: obtaining original data of the quartz flexible accelerometer at a plurality of time nodes; S200: establishing a linear regression model according to the original data; and S300: forward predicting predicted values of performance parameters of the quartz flexible accelerometer at a plurality of target time nodes according to the linear regression model. In the solutions of the application, the establishment of the linear regression model improves the calibration efficiency of the quartz flexible accelerometer, and reduces the number of times a dedicated device is used, thus saving costs.

IPC Classes  ?

• G01P 21/00 - Testing or calibrating of apparatus or devices covered by the other groups of this subclass
• G01P 15/08 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values

Abstract

A ground transmitting system and method for electromagnetic transmission between a well and a ground for intelligent drill guiding includes a well site power generation device, a ground transmitting device and current transmission ground electrodes. The well site power generation device, the ground transmitting device and the current transmission ground electrodes are connected in sequence. The well site power generation device is used for supplying power to the ground transmitting device. The ground transmitting device is used for sending generated current waveform to the current transmission ground electrodes through a transformer. The current transmission ground electrodes are used for sending the current waveform to an underground receiver through a drill pipe and strata to complete a ground transmitting for the electromagnetic transmission between the well and the ground for the drill guiding.

IPC Classes  ?

• E21B 47/13 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. of radio frequency range
• G01V 3/30 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with electromagnetic waves

Abstract

The present description relates to the field of geological exploration, and discloses a method and system for extracting features of logging while drilling and drilling-time logging based on Unet dual-channel output, aiming at solving the problem that the prior art 5 cannot integrate various types of information for lithology classification. The present invention comprises: acquiring stratum data of different wells; eliminating outliers, normalizing and resampling; performing data reconstruction via a self-encoder-based artificial neural network based on the pre-trained data to obtain stratum reconstructed data for training; inputting the data to be analyzed from shallow to deep in segments, performing 10 dynamic optimization while drilling on the pre-trained self-encoder-based artificial neural network by a quantile loss function; and extracting the independent components output by the encoder dual-channel for unsupervised clustering, and fitting to obtain a stratum lithology determination result corresponding to the current data to be analyzed.

IPC Classes  ?

• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• G01V 20/00 - Geomodelling in general

Abstract

The disclosure discloses a device and a processing method for offsetting an attitude error of a semi-airborne electromagnetic system. The method includes following steps: adjusting attitude angles of the adjustable offset coil based on the changing attitude angle of the measuring coil; obtaining a magnetic induction intensity of offset coils based on the offset coil pairs after an attitude angle adjustment; performing a calculation based on the magnetic induction intensity of the offset coils to obtain attitude error data of the measuring coil; obtaining a magnetic induction intensity of the measuring coil with an attitude error offset based on the magnetic induction intensity and the attitude error data of the measuring coil.

IPC Classes  ?

• G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
• G01R 33/00 - Arrangements or instruments for measuring magnetic variables

Abstract

A signal acquisition method of an azimuthal electromagnetic wave resistivity instrument includes receiving, by a receiving antenna, a magnetic induction signal after formation attenuation, and converting the received magnetic induction signal into an electrical signal; amplifying, by a preamplifier circuit, a fixed gain of a received signal with nV level amplitude induced on the receiving antenna; controlling a filtering circuit to filter the amplified signal; amplifying the filtered signal using a programmable amplifier circuit to generate a target signal; and conducting digital conversion for the target signal that meets the requirements of low-frequency acquisition.

IPC Classes  ?

• G01V 3/28 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device using induction coils
• E21B 47/024 - Determining slope or direction of devices in the borehole

Abstract

The present disclosure discloses an in situ U—Pb dating method for calcite, including: cutting a calcite sample to prepare an epoxy resin sample target; placing the sample in a laser ablation sample chamber, and adjusting a position of the sample in an optical axis direction; conducting line scanning ablation on the sample target, and measuring ion signal intensity data of 43Ca, 88Sr, 139La, and 238U; conducting two-dimensional (2D) element imaging to obtain a 2D element content distribution map; according to the 2D element content distribution map, determining a high-U analysis target area, conducting point ablation on the high-U target area, and measuring ion signal intensity data of 206Pb, 207Pb, and 238U; and after the element signal data is obtained, calculating 207Pb/206Pb and 238U/206Pb fractionation coefficients, correcting ratios of an unknown sample, constructing a Tera-Wasserbug diagram, and calculating age data and an initial Pb isotope (207Pb/206Pb) composition of the calcite sample.

IPC Classes  ?

• G01N 33/24 - Earth materials
• G01N 1/28 - Preparing specimens for investigation
• G01N 30/72 - Mass spectrometers
• G01N 33/202 - Constituents thereof

Abstract

The present disclosure is adapted to the field of geological exploration, and provides to a high-frequency magnetotelluric sounding instrument-based inversion method for energy spectrum, which provides that the energy spectrum obtained by transforming the time sequence signal in the high-frequency magnetotelluric data is defined as the model objective function and the data in the inversion objective function, to obtain the underground large-scale conductivity structure by inversion, which avoids the modification of the conventional detection method and detection instrument, and does not add extra expense and is easy to operate.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

The present disclosure is adapted to the field of geological exploration technology, and provides a semi-airborne electromagnetic-based method for extracting secondary field signal, in which two detection points with different distances from the emission source are provided on the flight route (detection route) during the detection process, and compares the signals detected at the two adjacent detection points to extract the secondary field signal, to better filter out the information generated by the primary electromagnetic field from the extracted field signal, so as to improve the signal quality of the secondary field signal detected by the semi-airborne electromagnetic method, and lay the foundation for high-quality imaging interpretation.

IPC Classes  ?

• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
• G01V 3/165 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device

Abstract

The present application is suitable for the technical field of geological measurements. Provided is an energy spectrum inversion method of a high-frequency magnetotelluric instrument. The method uses energy spectrums, which are obtained by performing transformation processing on time sequence signals in high-frequency magnetotelluric data, as data in an inversion objective function and uses a model objective function, so as to obtain a large-scale telluric conductivity structure by means of inversion. The method avoids modifications on present observation methods and observation instruments and thus does not cause extra expenses and is easy to operate.

IPC Classes  ?

• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

The present application is applicable to the technical field of geological survey, and provides a method for extracting a pure secondary field signal based on a semi-airborne electromagnetic method. According to the method, in an observation process, two observation points having different distances from an emitting source are set on a flight route (an observation line), and observed signals at the two neighboring observation points are compared to extract a secondary field signal. Information generated by a primary electromagnetic field can be better filtered out from the extracted field signal, the semi-airborne signal quality is improved, and a foundation is laid for high-quality imaging interpretation.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

Polymer-coated nanoparticles, a composite nano-emulsion and a macro-emulsion are provided. In the polymer-coated nanoparticles, the polymer self-assembles into a cage-shaped structure to coat the nanoparticles; and the nanoparticles are iron-containing metal oxides. The polymer-coated nanoparticle shell provided by the present invention can be used as a stabilizer to prepare a composite nano-emulsion, and furthermore, a stable macro-emulsion can be prepared at an extremely low concentration. The problems that high-concentration surfactants and solid particles are required to stay on an oil-water interface in macro-emulsion synthesis, and surface tension is reduced to stabilize large oil drops are overcome.

IPC Classes  ?

• C08K 9/08 - Ingredients agglomerated by treatment with a binding agent
• C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media

Abstract

An irregular seismic data collection method is based on forward modeling. The method includes: fully collecting geological information of a work area to build a geological model, determining arrangement parameters of receiver points and shot points for regular high-density collection and irregular sparse collection, performing irregular optimization design on positions of the shot points based on forward modeling, performing irregular optimization design on positions of the receiver points based on forward modeling, and outputting a preferred irregular sparse observation system. Compared with the existing technologies, an arrangement scheme of shot points and receiver points in the present invention, including the irregular sparse observation system, implements irregular optimization design of the shot points and the receiver points based on a forward modeling technology by using a greedy strategy, so that the designed irregular observation system can suppress to the greatest extent spatial aliasing caused by irregular sparse collection.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G06F 17/14 - Fourier, Walsh or analogous domain transformations

Abstract

A method for detecting adsorption performance of microplastics for heavy metals using low-field NMR relaxation method, including: establishing a reference line reflecting a relationship between a target heavy metal ion concentration and a transverse relaxation time; conducting a heavy metal adsorption experiment on microplastics and obtaining samples at different time points; detecting transverse relaxation times of the multiple samples obtained; determining a heavy metal ion concentration of each sample based on the reference line of the target heavy metal ion concentration and the transverse relaxation time; analyzing data and implementing a model fitting process. The method according to the present disclosure does not require cumbersome and complicated sample pre-processing, it can be measured immediately after sampling, it is simple, fast and low-cost, the method has a wide detection limit, the detection is faster, non-destructive testing can be achieved.

IPC Classes  ?

• G01N 24/08 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
• G01N 1/28 - Preparing specimens for investigation
• G01N 1/38 - Diluting, dispersing or mixing samples

Abstract

The present disclosure belongs to the field of geological exploration, and particularly relates to a seismic acquisition system based on a frequency domain expansion MEMS sensor, aiming at solving the problem that vibration frequencies exceed the frequency range of the MEMS sensor due to strong vibrations and cross coupling of multi-frequency signals usually occurring in well logging while drilling. When the MEMS sensor suffers strong vibrations or the MEMS sensor that can be selected cannot ensure that the frequency requirement of a measurement signal is stably met, the frequency domain expander of the present disclosure expands the frequency domain of a detection signal, so that the MEMS sensor can measure strong vibrations and out-of-band frequencies to a certain extent, the application range of the seismic acquisition system is extended, and the anti-mutation capability of the seismic acquisition system is improved.

IPC Classes  ?

• G01V 1/46 - Data acquisition
• G01V 1/18 - Receiving elements, e.g. seismometer, geophone

Abstract

A method for automatically identifying an active source azimuth of a planet seismometer, comprising: intercepting a three-channel original time sequence in a duration before and after an active source first arrival signal of each support leg received by a planet seismometer in turn; converting the three-channel original time sequence to a horizontal plane based on a pitch angle and a roll angle of the planet seismometer after being deployed to a surface of a planet; converting a time sequence of the horizontal plane to RTZ coordinates and calculating the maximum amplitudes of components of a vibration signal; constructing a target function based on the maximum amplitudes of components of a vibration signal, and scanning an azimuth of the planet seismometer at preset angle intervals, wherein when the target function reaches the minimum, the corresponding azimuth of the planet seismometer is the optimal estimation.

IPC Classes  ?

• G01V 1/30 - Analysis
• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups

Abstract

Provided are a method and a system for transient electromagnetic-induced polarization field separation and multi-parameter information extraction. The method includes the following steps: obtaining electromagnetic data influenced by an induced polarization effect; performing a separating treatment of an induced polarization field and an electromagnetic field on the electromagnetic data influenced by the induced polarization effect to obtain a pure electromagnetic response field and a pure induced polarization response field; based on the pure electromagnetic response field and the pure induced polarization response field, respectively performing a multi-parameter information inversion to complete an extraction of geoelectric parameters. This system includes a data obtaining module, a field separation module and a parameter inversion module.

IPC Classes  ?

• G01V 3/12 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with electromagnetic waves
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

A seismometer with high sensitivity, broadband and all-dip is provided, The which relates to the technical field of seismometer, including a first force feedback module, an insulator, a top cover, a terminal post, an upper leaf spring, a mass block, a casing, a sealing ring, an insulation gasket, a guide spring, a wire frame, a magnetic shoe, a compensation ring, a lower leaf spring, a bottom cover, a second force feedback module and a third force feedback module. It provides the broadband seismometer technology based on dynamic force balance feedback and the all-dip broadband seismometer technology based on dip angle perception, which breaks through the limitations of conventional seismometers in sensitivity, frequency band, and dip angle, and truly realizes a seismometer with high sensitivity, broadband, and all-dip.

IPC Classes  ?

• G01V 1/18 - Receiving elements, e.g. seismometer, geophone
• G01V 1/00 - SeismologySeismic or acoustic prospecting or detecting
• G01V 1/16 - Receiving elements for seismic signalsArrangements or adaptations of receiving elements
• G01V 1/20 - Arrangements of receiving elements, e.g. geophone pattern
• G01V 1/30 - Analysis

Abstract

The present invention belongs to the field of geological exploration and specifically relates to the fault characterization method and system for precise navigation of deep oil and gas based on image fusion, aiming to solve the problem that faults in deep formations are difficult to characterize with conventional seismic interpretation methods. The present invention includes: obtaining amplitude gradient images by calculating amplitude gradient vectors; calculating dip attribute images based on the enhanced seismic data; fusing gradient amplitude attribute fault confidence region with dip angle attribute data volume that defines the fault position through a hierarchical wavelet transform method to obtain a superimposed fault attribute map; dividing bead-like structures based on superimposed fault attribute maps; calculating the score of branch fault data points based on the center point position of bead-like structures, and dividing and analyzing the dominant fault areas.

IPC Classes  ?

• G01V 1/30 - Analysis
• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection

Abstract

A semi-airborne electromagnetic survey device and a semi-airborne electromagnetic survey method based on coaxial coplanar mutual reference coil assembly are provided. The device includes a measuring coil and a reference coil with linear correlation of additive motion noise; the reference coil and the measuring coil have a same bandwidth, are coaxial and coplanar and are in hard connection or soft connection; detection resolution of the reference coil only distinguishes the additive motion noise; detection resolution of the measuring coil distinguishes real vertical magnetic field signals and motion noise simultaneously; the reference coil has a much smaller outer diameter than the measuring coil. In the method, one coil only receives the additive motion noise, and an other coil simultaneously receives the additive motion noise and the real vertical magnetic field signals; and the additive motion noise received by the two coils is cancelled to obtain the real vertical magnetic field signals.

IPC Classes  ?

• G01V 3/16 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for use during transport, e.g. by a person, vehicle or boat specially adapted for use from aircraft
• G01V 3/36 - Recording data
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
• G01V 3/165 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device

Abstract

The invention belongs to the field of environmental monitoring, and in particular relates to a method for optimally selecting a carbon storage site based on multi-frequency band seismic data. The method comprises the steps of: performing seismic wavelet spread spectrum simulation based on three-dimensional post-stack seismic data to obtain spread spectrum simulated wavelets; building an isochronous stratigraphic framework model of a target horizon, and calculating the geometric structure and spatial distribution of a fault-karst; then performing waveform-indicated inversion to obtain a wave impedance inversion data volume, and obtaining a stable stratum wave impedance data volume through a virtual well cross-well wave impedance interpolation; calculating the difference between the stable stratum wave impedance data volume and the wave impedance inversion data volume to obtain an abnormal wave impedance data volume, then obtaining a fault-karst reservoir bed interpretation model, and determining the position of a carbon storage box.

IPC Classes  ?

• G01V 1/48 - Processing data

Abstract

Disclosed is a synchronization method for an MWD mud pulse telemetry system. The method comprises: determining a synchronous training sequence on the basis of a frame structure of downhole sent data; constructing a correlation between the down-hole sending synchronous training sequence waveform and the uphole synchronous training sequence local waveform by means of the irrelevance of the trigonometric function; and performing correlation calculation on the synchronous training codeword waveform, which is received uphole and is subjected to the first modulation, and the synchronous training sequence local waveform, which is subjected to the second modulation, so as to obtain a correlation curve, and finding a synchronous position by means of the correlation curve.

IPC Classes  ?

• E21B 47/20 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid by modulation of mud waves, e.g. by continuous modulation

Abstract

A test system and a test method for replacing natural gas hydrate with carbon dioxide are disclosed, relating to the technical field of exploitation of natural gas hydrates. The test system comprises a sample reaction vessel, a sample boundary condition loading device, a methane gas supply device, a carbon dioxide gas supply device, an output article collection and measurement device, and a data acquisition control device. A sample-sealing rubber sleeve and an upper sample-sealing plate are arranged in an inner cavity of the vessel, the sample-sealing rubber sleeve, a lower tray and the upper sample-sealing plate form a sample-sealing space. An axial pressure loading plate is arranged on the upper sample-sealing plate, and an upper cover plate is provided with an axial pressure loading injection hole. A side shrouding is provided with a confining pressure loading injection hole and a product discharge hole.

IPC Classes  ?

• G01N 33/24 - Earth materials
• G01N 30/02 - Column chromatography
• G01N 30/06 - Preparation
• G01N 30/24 - Automatic injection systems

Abstract

A multi-stage perforation and shock wave combined device and method for initial fracture enhancement are provided. The multi-stage perforation and shock wave combined device for initial fracture enhancement includes a perforating gun and a shock wave excitation nipple, where the perforating gun is configured to fire perforating bullets into a formation to form initial fractures; the shock wave excitation nipple is connected to the perforating gun, and includes an energetic rod capable of exploding after excitation and a feeding assembly; the feeding assembly includes a pushing head, a reciprocating spring, and a feeding spring; and the reciprocating spring is configured to push the pushing head, so as to push a spare energetic rod into a target position.

IPC Classes  ?

• E21B 43/263 - Methods for stimulating production by forming crevices or fractures using explosives
• E21B 43/116 - Gun or shaped-charge perforators
• E21B 23/08 - Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
• E21B 47/09 - Locating or determining the position of objects in boreholes or wellsIdentifying the free or blocked portions of pipes

Abstract

A calibration method for a measurement-while-drilling device; when measuring data at sea level, the calibration method comprises: horizontally suspending a measurement-while-drilling device; measuring amplitudes and phases at different heights; horizontally rotating the measurement-while-drilling device a plurality of times, and measuring amplitudes and phases at different heights after each horizontal rotation; and when the sum of the angles of the plurality of horizontal rotations is greater than 360 degrees, calculating an azimuth correction factor according to the measured amplitudes and phases. The calibration method for a measurement-while-drilling device is carried out on a wide seawater interface, so that the influence of boundary effect can be eliminated. Uniform medium properties of air and seawater can be simplified into a one-dimensional double-layer medium model, while an air-seawater environment ensures the consistency between a forward model and a measured environment. High air-seawater conductivity contrast can enhance azimuth signal strength. Moreover, by means of multi-angle measurement at different heights, the accuracy of calibration can also be greatly improved.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

Abstract

A data analysis and storage apparatus for aeromagnetic survey, comprising a storage box body (1), a moving structure (2) convenient to move being connected to the storage box body (1), a shielding structure (3) used for sunlight shielding being connected to the storage box body (1), an accommodation structure (4) used for accommodating articles being connected to the storage box body (1), a supporting structure (5) used for supporting being connected to the accommodation structure (4), and a placement structure (6) used for placement being connected to the storage box body (1).

IPC Classes  ?

• B65D 25/24 - External fittings for spacing bases of containers from supporting surfaces, e.g. legs
• B65D 6/06 - Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal, plastics, wood or substitutes therefor characterised by shape of drawer-and-shell type
• B65D 81/07 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using resilient suspension means
• B65D 25/28 - Handles
• B65D 43/16 - Non-removable lids or covers hinged for upward or downward movement
• B65D 85/68 - Containers, packaging elements or packages, specially adapted for particular articles or materials for machines, engines or vehicles in assembled or dismantled form

Abstract

A magnetofluid enhanced electromagnetic heating device and method for preventing and treating secondary hydrates around a well are provided. When exploiting natural gas hydrates by depressurization, secondary hydrates or ice can form due to the decreasing temperature around the well, so that gas migration in sediment is blocked, and the gas production is reduced. According to this disclosure, a coil is arranged outside a casing pipe to generate an alternating electromagnetic field radiated to sediment. As a result, magnetite nanoparticles naturally contained in the sediment generate magnetothermal effect to heat the sediment. Additionally, the magnetofluid containing the ferromagnetic nanoparticles can be injected together with fracturing fluid during hydraulic fracturing of the reservoir, so that the magnetothermal effect of the sediment is further enhanced. Thus, secondary hydrates or ice can be prevented from forming around the well so that the exploitation efficiency of natural gas hydrates is improved.

IPC Classes  ?

• E21B 36/04 - Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
• E21B 41/00 - Equipment or details not covered by groups
• E21B 43/26 - Methods for stimulating production by forming crevices or fractures

Abstract

The present invention discloses a model parameter design method and device for simulating propagation of seismic waves at any discontinuous interface, including: reading source wavelet and model parameters; selecting a space step and a time step according to the model parameters, and setting a space order of the finite difference numerical simulation; discretizing the discontinuous interface in the medium, and according to the threshold judgment criteria, obtaining many staircase discretization results for the discontinuous interface; conducting a forward modeling on the obtained multiple results of staircase discretization for the discontinuous interface by using the finite difference method, and setting parameters of the forward modeling; and obtaining the final simulation results by the superposition of the forward modeling results of different staircase-discretization of the discontinuous interface. The present invention can greatly improve the calculation efficiency.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection

Abstract

Disclosed in the embodiments of the present application are a signal transmission method, apparatus and device based on a drilling device, and a medium. Signal transmission is applied to a signal transmission system of a drilling device, wherein the signal transmission system comprises a master node and a plurality of slave nodes, and the master node communicates with the plurality of slave nodes by means of a 1-wire bus. The signal transmission method comprises: a master node sending to a designated slave node an instruction signal obtained by coupling a TTL signal with a data request signal, wherein the data request signal is a critical identifiable signal having the same cycle as the TTL signal, so as to ensure that a system can identify the logic level of the instruction signal and a 1-wire bus is occupied in real time; and the designated slave node receiving the instruction signal, performing decoupling on the instruction signal to obtain the data request signal, obtaining a reply signal on the basis of the data request signal, coupling the reply signal with the TTL signal to obtain a feedback signal, and sending the feedback signal to the master node.

IPC Classes  ?

• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• H04L 12/40 - Bus networks

Abstract

The present disclosure belongs to the field of geological prospecting and particularly relates to an intelligent real-time updating method and system for a stratigraphic framework with geosteering-while-drilling, aiming to solve the problems of insufficient precision in position and dipping angle of a stratigraphic framework due to differences in parameters measured by different instruments for well logging and mud logging while drilling. The method of the present disclosure comprises: obtaining existing well data, and acquiring well logging data and images imaged while-drilling in real time; constructing an initial stratigraphic framework model, eliminating abnormal values, and conducting dimensionality reduction; and based on dimensionality reduction well logging data, conducting non-linear clustering through a density peak clustering method, obtaining a marker layer primary prediction result through a marker layer prediction model of a depth belief network and conducting correction, to obtain a corrected stratigraphic framework model and to adjust a drilling trajectory.

IPC Classes  ?

• G01V 1/48 - Processing data
• G01V 1/36 - Effecting static or dynamic corrections on records, e.g. correcting spreadCorrelating seismic signalsEliminating effects of unwanted energy
• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
• E21B 47/00 - Survey of boreholes or wells
• E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G01V 1/30 - Analysis
• G01V 1/50 - Analysing data
• G01V 11/00 - Prospecting or detecting by methods combining techniques covered by two or more of main groups
• G01V 20/00 - Geomodelling in general
• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• G06N 3/04 - Architecture, e.g. interconnection topology
• G06N 3/08 - Learning methods
• G06T 7/00 - Image analysis
• G06T 17/05 - Geographic models
• G06V 10/74 - Image or video pattern matchingProximity measures in feature spaces
• G06V 10/762 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using clustering, e.g. of similar faces in social networks
• G06V 10/82 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using neural networks

Abstract

A data synchronization method for azimuthal measurement-while-drilling. The data synchronization method comprises: a control module enabling, according to a measurement-started command sent by a tool face angle measurement module, a timer to record a first time, and sending a detection-signal collection starting command to a detection signal collection module; the detection signal collection module performing parameter configuration according to the detection signal collection starting command, and sending a working-started command to the control module on the basis of a configuration-completed state; the control module disabling, according to the working-started command, the timer and recording second time; and calculating a deviation angle according to a time difference between the first time and the second time, and correcting the tool face angle measurement module on the basis of the deviation angle. Further provided is a data synchronization device for azimuthal measurement-while-drilling.

IPC Classes  ?

• G01V 13/00 - Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups

Abstract

Embodiments of the present disclosure provide a multi-physical field imaging method based on PET-CT and DAS, comprising: wrapping distributed acoustic sensors on a surface of a non-metallic sample to be tested, and then placing them in a pressure device; loading triaxial pressures; preparing a tracer fluid; pumping the tracer fluid into the non-metallic sample; collecting PET images and CT images of internal structure of the non-metallic sample, meanwhile, monitoring internal acoustic emission events of the non-metallic sample in real time; combining the PET images with the CT images, to obtain PET/CT images; locating the acoustic emission events, and obtaining occurrence time and spatial location of internal structural perturbations; and analyzing a mechanism of fluid-solid coupling effect in the non-metallic sample under loaded stress. The imaging method and system of the present disclosure can accurately and reliably image the fluid-solid coupling process in the material.

IPC Classes  ?

• G01T 1/29 - Measurement performed on radiation beams, e.g. position or section of the beamMeasurement of spatial distribution of radiation
• A61B 5/00 - Measuring for diagnostic purposes Identification of persons
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G01N 23/046 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
• G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
• G01N 29/22 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic wavesVisualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object Details

Abstract

Disclosed is a combined submarine seismic acquisition node with a secondary positioning function, including an ocean bottom node connected with an external loading ship; a protective sleeve circumferentially covering outside the ocean bottom node; and response components fixed inside the ocean bottom node, and the response components are configured to send position information of the ocean bottom node, and the response components may perform an information interaction with the loading ship.

IPC Classes  ?

• G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas

Abstract

The present disclosure belongs to the field of capture, utilization, and storage of carbon dioxide, particularly relates to a method and system for intelligently identifying a carbon storage box based on a GAN network, and aims at solving the problem that the analysis accuracy of a fault zone area in the prior art is insufficient. The method comprises the steps: delineating seismic waveform data of a stable sedimentary area through a GAN network, and removing seismic waveform data points in the fault zone area; obtaining a stable sedimentary background seismic waveform data invertomer; obtaining a three-dimensional wave impedance prediction data volume; making a difference to obtain an abnormal wave impedance data volume; retaining abnormal wave impedance data of fault-karst in the three-dimensional variance attribute volume to obtain a fault-karst wave impedance data volume; and then obtaining a carbon storage box interpretation model.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G01V 1/30 - Analysis

Abstract

A method, device, and system for evaluating geological and engineering sweet spots in an unconventional reservoir based on dual-energy computed tomography (CT) comprises acquiring and preprocessing a high-energy CT image and a low-energy CT image of a core from a core region, acquiring and preprocessing a high-energy CT image and a low-energy CT image of a core from a core reference sample, calculating a density and an effective atomic number of each pixel in the core region of a target reservoir, acquiring a geological sweet spot index and an engineering sweet spot index, acquiring evaluation results of geological and engineering sweet spots at different depths of the core region in the target reservoir, and matching the evaluation results to acquire reservoir types corresponding to the different depths of the core region in the target reservoir. The present disclosure achieves accurate and efficient reservoir evaluation and classification.

IPC Classes  ?

• G06V 10/764 - Arrangements for image or video recognition or understanding using pattern recognition or machine learning using classification, e.g. of video objects
• G06V 20/10 - Terrestrial scenes
• G06V 10/24 - Aligning, centring, orientation detection or correction of the image

Abstract

A method for determining rock wettability based on contact angle measurement and correction of multiple oil globules includes: saturating a rock sample with oil, placing a shooting angle calibration circle on a measurement surface of the rock sample, and placing the rock sample saturated with oil in water for water imbibition and oil displacement to form a rock sample with multiple oil globules; acquiring an image of a measurement surface of the rock sample with multiple oil globules at a shooting angle α and a deformation degree of the calibration circle in a shooting field of view, and calculating the shooting angle α; correcting, based on the shooting angle α, a contact angle measurement value γ through a contact angle correction model to acquire a contact angle correction value θ; and determining, based on the contact angle correction value θ, wettability of the rock sample.

IPC Classes  ?

• G01N 13/02 - Investigating surface tension of liquids
• G01N 33/24 - Earth materials

Abstract

A double-table vibration test apparatus, comprising two auxiliary apparatuses and two vibration apparatuses (60), wherein each auxiliary apparatus comprises: a lifting/lowering device (10) provided with a lifting/lowering part (11); and a sliding member (20) assembled on the lifting/lowering part (11), the sliding member (20) sliding with respect to the lifting/lowering part (11) in the longitudinal direction. A drilling tool is lifted by the two auxiliary apparatuses, so that the weight of the drilling tool does not exceed the maximum bearing capacity of the vibration apparatuses (60). According to the test apparatus, the vibration apparatuses (60) are not susceptible to damage, and during a vibration test process, the drilling tool is not susceptible to overturning.

IPC Classes  ?

• G01M 7/02 - Vibration-testing
• G01M 7/00 - Vibration-testing of structuresShock-testing of structures

Abstract

2 flowing state monitoring, the present invention can observe more data with higher reliability and effectively aims at the problem of strong inter-well heterogeneity.

IPC Classes  ?

• G01D 21/02 - Measuring two or more variables by means not covered by a single other subclass
• G01M 3/04 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
• G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
• G01V 3/02 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with propagation of electric current

Abstract

An exploration method and system for pegmatite veins, the exploration method comprising the following steps: on the basis of a target region where pegmatite veins are located, arranging three grounding electrodes at each observation point, and collecting the potential difference of every two grounding electrodes; on the basis of the arrangement positions of the grounding electrodes and the potential differences, drawing a multi-observation path graph; obtaining, on the basis of the horizontal change of the multi-observation path graph, resistivity change characteristics of the pegmatite veins, and determining the position and lithological characteristics of the pegmatite veins according to the resistivity change characteristics. Functional modules with different functions are used to form the exploration system for implementing the exploration method. Accurate exploration of steeply-inclined narrow pegmatite veins can be achieved, and thus the problems of the traditional observation mode using the potential difference between two points, such as poor resolution with respect to steeply-inclined, high-resistivity and narrow veins, are solved.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01V 3/36 - Recording data

Abstract

Disclosed is an exploration method and system for pegmatite veins. The exploration method includes: three grounding electrodes are arranged at each observation point in a target area where pegmatite veins are located, and collecting electric field differences between two groups of grounding electrodes; drawing a multi-channel map, based on positions of the grounding electrodes, according to the electric field differences; obtaining resistivity variation characteristics of pegmatite veins according to the transverse variation of multi-channel map, and determining locations and lithologic characteristics of pegmatite veins according to the resistivity variation characteristics. Through functional modules with different functions, an exploration system is formed to realize the exploration method mentioned in the application.

IPC Classes  ?

• G01V 3/08 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
• G01N 33/24 - Earth materials
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction
• G01N 27/04 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance

Abstract

Disclosed is a rock similar material satisfying a water-induced strength degradation characteristic and a preparation method and use thereof. The rock similar material satisfying the water-induced strength degradation characteristic includes an aggregate, a cementing material, and an additive, where the aggregate includes quartz sand, barite powder, and bentonite, and the cementing material includes cement and gypsum.

IPC Classes  ?

• C04B 11/28 - Mixtures thereof with other inorganic cementitious materials
• C04B 14/06 - QuartzSand
• C04B 14/10 - Clay
• C04B 14/36 - Inorganic materials not provided for in groups
• C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
• C04B 28/04 - Portland cements
• C04B 103/22 - Set retarders
• C04B 111/00 - Function, property or use of the mortars, concrete or artificial stone

Abstract

A method and apparatus for underwater acoustic communication are disclosed. A data packet frame structure in the communication transmission includes a preamble, a synchronization code, and a data code. A guard interval is disposed between the preamble and the synchronization code. This method utilizes the different impact response environments of linear frequency modulation signals in different frequency bands to obtain the mapping relationships corresponding to the characteristics of the impulse responses in the frequency band, and adopts the quadrature phase shift keying (QPSK) modulation method to convert four groups of LMF signals with different center frequencies and the same modulation frequency, representing different symbols for signal transmission, where the LFM carrier signal of each center frequency can represent two bits of binary information to improve transmission efficiency. The apparatus for underwater acoustic communication also has the above-mentioned technical effects.

IPC Classes  ?

• H04L 27/00 - Modulated-carrier systems
• H04B 13/02 - Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
• H04L 27/26 - Systems using multi-frequency codes

Abstract

The present disclosure provides a method and system for predicting a relative permeability curve based on machine learning. The present disclosure takes logging curve data as an input, and water saturation endpoint values as an output to establish a first relative permeability curve starting point model, and takes the logging curve data and a predicted water saturation starting value output from the first relative permeability curve starting point model as an input, and relative permeabilities under different water saturations as an output to establish a first relative permeability model, thereby obtaining a comprehensive prediction method for the relative permeability curve based on deep learning, and implying control mechanisms and parameters to a model.

IPC Classes  ?

• E21B 49/02 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil

Abstract

The present disclosure discloses a method of obtaining a seismic while drilling signal. The method comprises the following steps: arranging geophones by using a first observation method to obtain a first seismic reference signal and a second seismic reference signal; arranging geophones by using a second observation method to obtain first seismic data; arranging geophones by using a third observation method to obtain second seismic data; comparing the first seismic reference signal with the second seismic reference signal to obtain a first output reference signal, and optimizing the first output signal to obtain a second output reference signal. The present disclosure obtains square matrix and near-wellhead seismic while drilling data through the combination of geophone square matrix combined observation, near-wellhead observation, and survey line observation, the data acquisition efficiency is relatively high, the signal-to-noise ratio is high, and thus, the problem of near-surface noise interference is effectively solved.

IPC Classes  ?

• G01V 1/28 - Processing seismic data, e.g. for interpretation or for event detection
• G01V 1/18 - Receiving elements, e.g. seismometer, geophone

Abstract

A graph neural network (GNN)-based prediction system for total organic carbon (TOC) in shale solves the problem that the existing shale TOC prediction method cannot fully analyze the complex nonlinear relationship between all logging curves and TOC. The prediction system adopts a method including: acquiring and preprocessing a plurality of logging curves of a target well location in a target shale bed to acquire a plurality of standardized logging curves, windowing the plurality of standardized logging curves, and inputting the windowed logging curves and weight matrix into a trained GNN-based TOC prediction network to acquire TOC of the target well location. The prediction system inputs the plurality of logging curves as correlative multi-dimensional dynamic graph data for analysis and can acquire the complex nonlinear relationship between the logging curves and TOC, thus improving the prediction accuracy of TOC.

IPC Classes  ?

• G06N 5/022 - Knowledge engineeringKnowledge acquisition
• G06N 3/08 - Learning methods

Abstract

An adjustable device for railway to cross active faults is provided to fix a rail and a sleeper, including: a fastener mounting base, disposed between the rail and sleeper; clamping pipes, disposed between the fastener mounting base and the sleeper, the sleeper is provided with a through groove, and the clamping pipes are detachably fixed inside the through groove; control parts, disposed on an inner wall of the clamping pipes, each of the control parts is configured to detect lateral pressures between the fastener mounting base and corresponding one of the clamping pipes, thereby to separate the corresponding one of the clamping pipes from the through groove, the device ensures that the rail will not produce bending deformations after the lateral dislocation of the bottom layer during earthquake events, and ensure that a train or rail repair vehicle can pass at a low speed after earthquake.

IPC Classes  ?

• E01B 9/66 - Rail fastenings allowing the adjustment of the position of the rails, so far as not covered by the preceding groups

Abstract

An ion beam cutting calibration system includes a sample cutting table, a coarse calibration device, a microscopic observation device, and a flip table. The flip table includes a flip plate, which is configured to drive the sample cutting table to swing in a vertical plane. The swing axis of the flip plate is collinear with the side edge of the top surface of the ion beam shielding plate close to the sample. Through the coordinated operation of the flip table, the microscopic observation device, the sample cutting table, and the coarse calibration device, the ion beam cutting calibration system avoids the problem that when the position relationship between the sample and the shielding plate is observed from multiple angles during calibration loading, the sample and the shielding plate are likely to be moved out of the field of vision of the microscope and out of focus.

IPC Classes  ?

• H01J 37/20 - Means for supporting or positioning the object or the materialMeans for adjusting diaphragms or lenses associated with the support
• H01J 37/31 - Electron-beam or ion-beam tubes for localised treatment of objects for cutting or drilling
• G02B 27/32 - Fiducial marks or measuring scales within the optical system
• G02B 25/00 - EyepiecesMagnifying glasses
• G02B 21/24 - Base structure

Abstract

A method and system for determining acoustic emission (AE) parameters of rock based on moment tensor analysis. The method includes: constructing, according to macroscopic mechanical parameters, a numerical model of a rock specimen to be tested; loading the numerical model through particle flow code software to simulate a failure process of the rock specimen to be tested, and identifying fracturing time and positions of microcracks when the PFC software loads the numerical model; determining, when the PFC software loads the numerical model, if rock grains of two sequentially generated microcracks include common rock grains, and an interval for generating the two microcracks is less than duration time of a present AE event, the two microcracks as a same AE event; taking geometric centers of all microcracks within a spatial range of an AE event as source positions of the corresponding AE event; and determining AE parameters of the AE event.

IPC Classes  ?

• G01N 3/06 - Special adaptations of indicating or recording means
• G01N 3/08 - Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
• G01N 3/60 - Investigating resistance of materials, e.g. refractory materials, to rapid heat changes

Abstract

The present disclosure provides a method and a system for high-resolution seismic fault detection by means of an adversarial neural network, including following steps of: training a target adversarial neural network based on a preset training sample set, so as to obtain a trained target adversarial neural network, wherein the preset training sample set includes seismic data and fault labels, the target adversarial neural network includes: a segmentation module, a feature fusion module, and a discriminator module, the segmentation module is a module configured for obtaining a fault feature based on the preset training sample set, and the feature fusion module is a module configured for fusing the fault feature and the seismic data into a global feature map; and performing seismic fault detection on a target seismic image based on the trained target adversarial neural network.

IPC Classes  ?

• G01V 1/30 - Analysis
• G06N 3/08 - Learning methods

Abstract

The present invention belongs to the field of treatment for data identification and recording carriers, and specifically relates to a method and system for analyzing filling for a karst reservoir based on spectrum decomposition and machine learning, which aims to solve the problems that by adopting the existing petroleum exploration technology, the reservoir with fast lateral change cannot be predicted, and the development characteristics of a carbonate cave type reservoir in a large-scale complex basin cannot be identified. The method comprises: acquiring data of standardized logging curves; obtaining a high-precision 3D seismic amplitude data body by mixed-phase wavelet estimation and maximum posteriori deconvolution and enhancing diffusion filtering. According to the method and the system, the effect of identifying the development characteristics of the carbonate karst cave type reservoir in the large-scale complex basin can be achieved, and the characterization precision is improved.

IPC Classes  ?

• G01V 1/30 - Analysis
• G01V 5/12 - Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using gamma- or X-ray sources
• G06N 3/08 - Learning methods

Abstract

Disclosed is a tunnel protection structure suitable for active fault areas and high ground stress areas, and relates to the technical field of tunnel engineering construction. The tunnel protection structure comprises at least one protection unit, wherein a plurality of protection units are sequentially connected and distributed along the axial direction of a tunnel, and the protection units comprise a radial protection ring and two axial protection rings which are fixedly arranged between a lining structure and surrounding rock and are distributed along the axial direction of the tunnel; the radial protection ring comprises a plurality of radial buffer energy consumption layers which are sequentially sleeved along the radial direction of the tunnel; and the axial protection ring comprises a plurality of axial buffer energy consumption layers which are sequentially and fixedly connected along the axial direction of the tunnel.

IPC Classes  ?

• E21D 11/05 - Lining with building materials using compressible insertions

Abstract

A purification system for nitrogen gas and xenon gas in water and a static isotopic analysis method thereof are provided. The system includes a sample container, a carbon dioxide ice cold trap, a gas delivery main pipe and a mass spectrometer for noble gas communicated sequentially. The gas delivery main pipe is provided with branch pipelines communicated with a cryo pump and a vacuum pump set respectively, the mass spectrometer for noble gas is communicated with the vacuum pump set, and the cryo pump adsorbs or releases nitrogen gas and/or xenon gas by setting different temperatures of the cryo pump. Inlet and outlet sides of the carbon dioxide ice cold trap are respectively provided with a first valve and a second valve. Fourth and fifth valves are respectively disposed between the gas delivery main pipe and the vacuum pump set, and between the gas delivery main pipe and the cryo pump.

IPC Classes  ?

• G01N 27/623 - Ion mobility spectrometry combined with mass spectrometry
• G01N 1/42 - Low-temperature sample treatment, e.g. cryofixation
• G01N 1/40 - Concentrating samples
• F25J 3/08 - Separating gaseous impurities from gases or gaseous mixtures
• B01D 8/00 - Cold trapsCold baffles

Abstract

This application provides an adaptive damping magnetic field sensor, including: a receiving coil, an adaptive damping matching resistance circuit, and an amplifying circuit; where the receiving coil is used for receiving an earth response signal generated by the earth under excitation of an emission source, and generating an induced voltage; the adaptive damping matching resistance circuit is used for receiving the induced voltage generated by the receiving coil and automatically matching a damping resistance value to obtain a near-source broadband observation signal; and the amplifying circuit is used for amplifying the observation signal with a constant gain and outputting a sensor output signal. This application carries out automatic matching control on the damping resistance value through the adaptive damping matching resistance circuit, thereby ensuring that the sensor can stably and reliably implement fine observation of an earth response under near-source, broadband and complex scene conditions.

IPC Classes  ?

• G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
• G01R 33/385 - Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
• G01V 3/40 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for measuring magnetic field characteristics of the earth

Abstract

The present invention provides a device and a method for measuring fluid saturation in nuclear magnetic resonance (NMR) on-line displacement, the method comprising: measuring a nuclear magnetic resonance (NMR) T2 spectrum under the dead volume filling of the on-line displacement system as displacing phase fluid and the core to be measured as saturated nuclear magnetic detection phase fluid to generate a calibrated T2 spectrum; measuring a nuclear magnetic resonance (NMR) T2 spectrum of a process in which the core to be measured is converted from a saturated displaced phase fluid into a displacing phase fluid to generate a displacement process T2 spectrum; generating the fluid saturation of the on-line displacement system in real time according to the generated calibrated T2 spectrum and the displacement process T2 spectrum. The present invention achieves the purpose of improving measurement precision of fluid saturation in the on-line displacement process.

IPC Classes  ?

• G01N 24/08 - Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
• G01N 15/08 - Investigating permeability, pore volume, or surface area of porous materials
• G01R 33/44 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
• G01V 3/32 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for well-logging operating with electron or nuclear magnetic resonance
• G01V 3/38 - Processing data, e.g. for analysis, for interpretation or for correction

Abstract

Disclosed are a signal transmission method, device and equipment based on drilling equipment, and a medium, the signal transmission is applied to a signal transmission system of the drilling equipment, the signal transmission system includes a master node and a plurality of slave nodes, and the master node communicates with the slave nodes through a 1-wire bus. The signal transmission method includes: sending, by the master node, an instruction signal coupled by a TTL signal and a data request signal to a specified slave node, wherein the data request signal is a critical identifiable signal with the same period as the TTL signal so as to ensure that the system can identify the logic level of the instruction signal and occupy the 1-wire bus in real time; and receiving, by the specified slave node, the instruction signal, decoupling the instruction signal to obtain the data request signal, obtaining a reply signal according to the data request signal, coupling the reply signal with the TTL signal to obtain a feedback signal, and sending the feedback signal to the master node.

IPC Classes  ?

• G06F 13/40 - Bus structure
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Abstract

Disclosed is a contactless connector, a signal processing method and a storage medium. The contactless connector can be in communication connection to a plug matched with the contactless connector. The plug is provided with a second magnetic core and a second coil, and the second coil is spirally arranged at the periphery of the second magnetic core and forms a secondary coil with the second magnetic core. The contactless connector includes: at least two plug interfaces, each of the plug interfaces including a first magnetic core; and a first coil, spirally arranged at an inner periphery of the first magnetic core of each of the plug interfaces and forming a main coil with the first magnetic core. When the contactless connector and a plurality of plugs are connected through at least two plug interfaces, the main coil and the secondary coil are electromagnetically coupled to realize communication connection between the contactless connector and the plurality of plugs. According to the present application, it can be achieved that the wiring difficulty between devices may be reduced while the service life of the connector is ensured.

IPC Classes  ?

• H04B 5/00 - Near-field transmission systems, e.g. inductive or capacitive transmission systems
• H04B 1/38 - Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• H04B 1/48 - Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H01F 38/14 - Inductive couplings

Abstract

Disclosed is a signal processing circuit, a contactless connector, a signal processing method and a storage medium. One end of a cable of the signal processing circuit can be connected to a device and the other end of the cable of the signal processing circuit is connected to a port processing unit for receiving a signal transmitted by the device and/or transmitting a signal to the device; one end of the port processing unit is connected to the cable, and the other end of the port processing unit is connected to a signal processing unit for acquiring a data communication transmission mode of a port of the device connected to a connector, and performing interface configuration on the cable according to the data communication transmission mode; and the signal processing unit is connected to the main coil or the secondary coil, and is configured to, if receiving the signal transmitted by the device, transmit the signal to the main coil and/or the secondary coil, and/or is configured to, if receiving the signal transmitted by the main coil and/or the secondary coil, transmit the signal to the device according to the data communication transmission mode. According to the present application, the contactless connector adapts to different transmission protocols of the device port while remote wireless signal transmission is realized.

IPC Classes  ?

• G06F 13/40 - Bus structure
• G06F 13/42 - Bus transfer protocol, e.g. handshakeSynchronisation
• H04L 69/08 - Protocols for interworkingProtocol conversion
• H01R 13/66 - Structural association with built-in electrical component
• H01R 24/40 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
• H04B 3/02 - Line transmission systems Details

Abstract

The present invention relates to alternating stress fatigue testing equipment. The alternating stress fatigue testing equipment includes a pedestal on which linear guide rails are arranged; a deflection loading device which is arranged on the pedestal and configured to, in response to a clamped to-be-measured object being driven to slide to a first position, enable the to-be-measured object to be bent to a target degree and keep the to-be-measured object after the to-be-measured object is bent to the target degree, wherein the deflection loading device is rotatably connected to the to-be-measured object; two hinged shaft supports which are arranged on the linear guide rails, wherein the hinged shaft supports are symmetrically arranged about a longitudinal center line of the deflection loading device, connected to both ends of the to-be-measured object respectively, and configured to be adjusted obliquely to adapt to the bending of the to-be-measured object to the target degree.

IPC Classes  ?

• G01N 3/20 - Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
• G01N 3/04 - Chucks
• G01N 3/32 - Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
• E21B 47/007 - Measuring stresses in a pipe string or casing

Abstract

A media Parameter-modified method for realizing an adaptive expression of an arbitrary discontinuous surface, comprising the following steps: importing an initial forward model, importing anisotropic parameters; and setting a space step and a time step according to the initial forward model parameters; and then starting a stepped discretization of a free surface of the initial forward model; and using a corrected constitutive relationship to correct a first level parameter of the initial forward model; and bringing the corrected constitutive relationship into a displacement stress equation, and the influence of the free surface can be introduced in the case of the anisotropic media after series of operation. The present disclosure can make an accurate numerical simulation of a wave field near the discontinuous surface, and the accurate numerical simulation will contribute to the extraction and analysis of information from the seismic data.

IPC Classes  ?

• G06F 30/23 - Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
• G01V 1/30 - Analysis
• G06F 111/10 - Numerical modelling

Abstract

An electromagnetic wave field data processing method is provided and includes determining loss-free electromagnetic wave field data corresponding to electromagnetic wave field data according to the electromagnetic wave field data; performing first amplitude compensation on the electromagnetic wave field data and the loss-free electromagnetic wave field data; extracting waveform information; determining a first sequence corresponding to the electromagnetic wave field data and a second sequence corresponding to the loss-free electromagnetic wave field data which meet a preset condition respectively from the waveform information, determining time sequences corresponding to the first sequence and the second sequence; and determining an attenuation coefficient of the electromagnetic wave field data according to a first preset mode and performing second amplitude compensation on the electromagnetic wave field data according to the attenuation coefficient.

IPC Classes  ?

• G01S 13/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
• G01S 13/88 - Radar or analogous systems, specially adapted for specific applications

Abstract

A dip angle-steering median filtering method based on a niche differential evolution algorithm, comprising the following steps: dividing a data to be processed into a series of overlapping time-space windows; obtaining an event energy curve in a time-space window and obtaining an event position according to a local maximum value of the event energy curve; obtaining event dip angles and coherence values of the event dip angles through the niche differential evolution algorithm at the event position; filtering the event dip angles according to the event dip angles and the coherence values of the event dip angles; and performing a median filtering sequentially along a filtering dip angle. The disclosure can simultaneously obtain all dip angles of intersecting events and a true three-dimensional feature enable the present disclosure to obtain a better filtering effect.

IPC Classes  ?

• G01V 1/38 - SeismologySeismic or acoustic prospecting or detecting specially adapted for water-covered areas
• B62D 15/02 - Steering position indicators
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear

Abstract

Embodiments of the present application provide a density inversion method and apparatus, and an electronic device. The method comprises: obtaining local gravity anomalies of a target object under measurement at a plurality of measurement points in a target measurement area (S101); acquiring distance information between a center position of an area where the target body is located and a specified boundary, wherein the specified boundary is the boundary of the target measurement area (S102); on the basis of the distance information and a specified depth, determining a target inversion depth utilized when performing density inversion on the target object (S103); and substituting the local gravity anomaly of the target body at each measurement point and the target inversion depth into a preset layer density inversion formula to obtain a density distribution of the target body on a transverse cross section, wherein the layer density inversion formula is: a deformation formula of the density inversion formula under the condition that the longitudinal cross section density is unchanged (S104). On the basis of the present solution, the accuracy of the density distribution obtained by inversion can be improved.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06F 17/14 - Fourier, Walsh or analogous domain transformations

Abstract

A reception compensation apparatus based on airborne transient electromagnetic method is disclosed, and includes a receiver coil, a transmitter coil, at least one compensation coil, and at least one compensation magnetic core, where the transmitter coil is disposed around a periphery of the receiver coil. The at least one compensation magnetic core is disposed around an outer surface of the transmitter coil. The at least one compensation coil is disposed around an outer surface of the compensation magnetic core.

IPC Classes  ?

• G01V 3/10 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
• G01V 3/165 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device

Abstract

A density determination method and apparatus, and an electronic device, which are applied to the technical field of geophysical exploration. The density determination method comprises: acquiring Bouguer gravity anomalies at a plurality of measurement points set for a target body to be measured; for each measurement point, determining the Bouguer gravity anomaly of said target body at the measurement point on the basis of the Bouguer gravity anomalies at the plurality of measurement points and taking same as a first anomaly at the measurement point, and on the basis of the Bouguer gravity anomalies at the plurality of measurement points, determining a Bouguer gravity anomaly, at the measurement point, of a reference body corresponding to said target body, and taking same as a second anomaly at the measurement point; for each measurement point, calculating the difference between the first anomaly and the second anomaly at the measurement point, and taking same as a local gravity anomaly; and performing density inversion on said target body on the basis of the local gravity anomaly of said target body at each measurement point, so as to obtain a density distribution of said target body on a cross section. By means of the method, the density of a target body can be acquired more accurately.

IPC Classes  ?

• G01V 7/00 - Measuring gravitational fields or wavesGravimetric prospecting or detecting
• G01N 9/00 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity