Method and composition for recovering hydrocarbon fluids...

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 59/10 (2006.01) C09K 8/74 (2006.01) C09K 8/88 (2006.01) E21B 43/22 (2006.01) E21B 43/27 (2006.01) C08G 59/00 (2006.01) C08G 73/02 (2006.01) C09K 3/00 (2006.01) E21B 43/16 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2538753

A method of modifying the permeability to water of a subterranean formation comprising injecting into the subterranean formation an aqueous composition comprising from about 0.005 percent to about 2 percent, by weight, of an alkyl or an alkylene oxide branched polyhydroxyetheramine or a salt thereof, wherein the fatty alkyl or alkylene oxide branched polyhydroxyetheramine is prepared by reacting a diepoxide with a) one or more fatty alkyl or alkylene oxide functionalized amines or a mixture of one or more alkylene oxide functionalized amines and b) one or more amines having two reactive hydrogen atoms and c) optionally reacting the resulting polyhydroxyetheramine with an acid or alkylating agent to form the salt.

L'invention concerne un procédé de modification de la perméabilité à l'eau d'une formation souterraine, ce procédé consistant à injecter, dans la formation souterraine, une composition aqueuse comprenant environ 0,005 à environ 2 pour cent, par rapport à son poids, d'une polyhydroxyétheramine à ramification alkyle ou oxyde d'alkylène ou d'un de ses sels. Cette polyhydroétheramine à ramification alkyle gras ou oxyde d'alkylène est préparé en faisant réagir un diépoxide avec a) une ou plusieurs amines à fonctionnalisation alkyle gras ou oxyde d'alkylène ou un mélange d'une ou plusieurs amines à fonctionnalisation alkyle gras ou oxyde d'alkylène, et b) une ou plusieurs amines contenant deux atomes d'hydrogène réactifs, ainsi que c) en faisant éventuellement réagir la polyhydroxyétheramine obtenue avec un acide ou un alcoylant afin d'obtenir le sel.

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