E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 37/06 (2006.01) C09K 8/584 (2006.01) E21B 43/22 (2006.01)
Patent
CA 2385605
The present invention generally relates to a method and a composition useful in restoring the permeability of a porous underground petroleum-containing formation. Restoring permeability to the formation enhances the injectivity thereby accelerating petroleum recovery. The method of the invention comprises treating said formation with a composition which comprises a combination of at least one nonionic compound, preferably an alkoxylated alcohol, with at least one cationic compound, preferably a quaternary ammonium compound, in an amount effective to improve the permeability of the formation. The composition may also optionally contain an alkyl glycoside.
La présente invention concerne un procédé et une composition permettant de rétablir la perméabilité d'une formation souterraine poreuse renfermant du pétrole. Le rétablissement de cette perméabilité se traduit par une amélioration de la capacité d'injection, ce qui améliore le rendement. Le procédé selon l'invention consiste à traiter cette formation à l'aide d'une composition comprenant une combinaison d'au moins un composé non ionique, de préférence, un alcool alcoxylaté, avec au moins un composé cationique, de préférence, un composé d'ammonium quaternaire, selon une quantité efficace pour améliorer la perméabilité de la formation. Cette composition peut éventuellement contenir un alkyl glycoside.
Gadberry James F.
Johnson Andress K.
Slikta Alberto
Akzo Nobel N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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