Polyamine salts as clay stabilizing agents

Details Polyamine salts as clay stabilizing agents Polyamine salts as clay stabilizing agents

C - Chemistry, Metallurgy

08

F

C08F 22/40 (2006.01) C07D 207/40 (2006.01) C09K 17/20 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2546469

A clayish subterranean formation, such as may be encountered in rock surrounding a well bore during hydrocarbon recovery operations may be stabilized with acid ammonium salt of an imide of polymaleic anhydride. The salt may be unneutralized or partially neutralized. The invention is particularly relevant to hydraulic fracturing fluids used in enhanced oil recovery. The compositions of this invention are more environmentally friendly than some current technology.

Une formation souterraine argileuse, telle qu'on peut en trouver dans la roche entourant un puits de forage pendant les opérations d'extraction d'hydrocarbures, peut être stabilisée à l'aide d'un sel d'ammonium acide d'un imide d'anhydride polymaléique. Le sel peut être non neutralisé ou partiellement neutralisé. L'invention s'applique en particulier aux fluides hydrauliques de fracturation utilisés dans des techniques améliorées d'extraction pétrolière. Les compositions de l'invention sont plus écologiques que certaines techniques actuelles.

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