Recovering oil by injecting aqueous alkali, cosurfactant and...

Details Recovering oil by injecting aqueous alkali, cosurfactant and... Recovering oil by injecting aqueous alkali, cosurfactant and...

E - Fixed Constructions

21

B

31/14

E21B 43/22 (2006.01) C09K 8/584 (2006.01)

Patent

CA 1216745

A B S T R A C T RECOVERING OIL BY INJECTING AQUEOUS ALKALI, COSURFACTANT AND GAS A process of recovering oil from a subterranean reservoir in which the oil is acidic but forms monovalent cation soaps of only relatively low interfacial activity when reacted with aqueous alkaline solutions, comprises displacing the oil toward a pro- duction location with a mixture of gas and cosurfactant-containing aqueous alkaline solution.

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