Oil recovery process employing amphoteric surfactants

Details Oil recovery process employing amphoteric surfactants Oil recovery process employing amphoteric surfactants

E - Fixed Constructions

21

B

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

Patent

CA 2618817

An oil recovery method employing amphoteric surfactants with the steps of: a) Injecting into one or more injection wells an aqueous solution containing a mixture of amphoteric surfactants containing mixture of amphoteric surfactants having a hydrocarbyl chain length between 8 and 26 and certain degree of unsaturation, and b) recovering the oil from one or more producing wells. The aqueous injection fluid may also contain one or more of the following: a thickening agent, an alkali, a co-solvent.

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