Surfactant compositions useful in enhanced oil recovery...

E - Fixed Constructions – 21 – B

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31/16, 134/30

E21B 43/22 (2006.01) B01F 17/00 (2006.01) C09K 8/584 (2006.01)

Patent

CA 1146834

ABSTRACT Surfactant composistions comprising: (1) an alkylated diphenyl oxide sulfonate, (2) a petroleum sulfonate, (3) a condensation product of an alkanol and an alkylene oxide, and (4) a glycol ether are useful in enhanced oil recovery processes.

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