Surfactant waterflooding oil recovery method

Details Surfactant waterflooding oil recovery method Surfactant waterflooding oil recovery method

E - Fixed Constructions

21

B

31/11, 166/33

E21B 43/22 (2006.01) C09K 8/584 (2006.01) C09K 8/588 (2006.01)

Patent

CA 1156445

SURFACTANT WATERFLOODING OIL RECOVERY METHOD (D#76,731-C1-F) ABSTRACT OF THE DISCLOSURE Disclosed is a novel surfactant fluid and an oil recovery method using the fluid for recovering oil from subterranean formations thereof by surfactant waterflooding process. The fluid comprises water and at least one sur- factant, preferably including an alkylpolyalkoxyalkylene sulfonate or an alkylarylpolyalkoxyalkylene sulfonate and as an additive for reducing the rigidity of the interfacial film, a silica-polydialkylsiloxane such as a silica-polydi- methylsiloxane. Reduction in rigidity of the interfacial film occupied by surfactant molecules of which the hydro- phobic portion is dissolved in the oil phase and the hydro- philic portion is dissolved in the aqueous phase, improves the effectiveness of the surfactant fluid for recovering oil from subterranean formations. -I-

382038

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