The present invention provides a method for increasing the retention of a scale inhibitor within a hydrocarbon producing system, said method comprising the steps of: (i) pre-flushing said system with a liquid; (ii) treating said system with a scale inhibitor; and (iii) over-flushing said system with a composition comprising an ionic polymer and a liquid carrier, wherein the concentration of said ionic poliymer in said composition is 5 to 50 %wt.
The present invention provides a corrosion inhibitor composition comprising: a carrier; at least one compound of formulae (ll)-(VII) or a salt or quaternised derivative thereof: wherein R is C5-21 alkyl or alkenyl, preferably alkyl; each R1 is independently an optionaliy substituted group of formula -(CH2)nX wherein n is an integer from 1 to 6 and X is C(O)OZ or SO3Z and Z is H or a cation; and R' is C4-20 alkyl or alkenyl, preferably alkyl; and a quaternary ammonium compound.
C09K 8/54 - Compositions pour inhiber in situ la corrosion dans les puits ou les trous de forage
C10G 75/02 - Inhibition de la corrosion ou des salissures dans des appareils de traitement ou de conversion des huiles d'hydrocarbures, en général par addition d'inhibiteurs de corrosion
E21B 41/02 - Lutte contre la corrosion sur place dans les trous de forage ou dans les puits
3.
Well treatment comprising a polymer formed from a diallyl ammonium salt and a scale inhibitor
The present invention provides a method for increasing the retention of a scale inhibitor within a hydrocarbon producing system (e.g. a subterranean formation), said method comprising contacting said system with a polymer formed from a diallyl ammonium salt and with said scale inhibitor, wherein said polymer formed from a diallyl ammonium salt has a molecular weight of greater than 50,000 (e.g. a molecular weight of 55,000 to 2,000,000).
C09K 8/52 - Compositions pour éviter, limiter ou éliminer les dépôts, p. ex. pour le nettoyage
C09K 8/60 - Compositions pour activer la production en agissant sur la formation souterraine
E21B 37/06 - Procédés ou appareils pour nettoyer les trous de forage ou les puits utilisant des moyens chimiques pour empêcher ou limiter le dépôt de paraffine ou de substances analogues
The invention provides a method for increasing the retention of a proppant within a hydrocarbon producing system (e.g. a subterranean formation), said method comprising contacting a formation comprising said proppant with an organosilane. Kits for use in such methods and which comprise a proppant and separately an organosilane are afso provided.
The present invention provides a method for delivering a scale treatment agent to a hydrocarbon producing system, said method comprising: contacting said system with a foam comprising said scale treatment agent; and shutting said scale treatment agentin said system for at least 0.5 hour.
C09K 8/528 - Compositions pour éviter, limiter ou éliminer les dépôts, p. ex. pour le nettoyage les dépôts inorganiques, p. ex. sulfates ou carbonates
C09K 8/536 - Compositions pour éviter, limiter ou éliminer les dépôts, p. ex. pour le nettoyage caractérisées par leur forme ou par la forme de leurs composants, p. ex. matériaux encapsulés
E21B 37/06 - Procédés ou appareils pour nettoyer les trous de forage ou les puits utilisant des moyens chimiques pour empêcher ou limiter le dépôt de paraffine ou de substances analogues
The present invention provides a method for increasing the retention of a scale inhibitor within a hydrocarbon producing system (e.g. a subterranean formation), said method comprising contacting said system with a polymer formed from a diallyl ammonium salt and with said scale inhibitor, wherein said polymer formed from a diallyl ammonium salt has a molecular weight of greater than 50,000 (e.g. a molecular weight of 55,000 to 2,000,000).
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