Composition and process for enhanced oil recovery

Details Composition and process for enhanced oil recovery Composition and process for enhanced oil recovery

1987-03-24

1988-04-12

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

252 8554, E21B 4322

Patent

active

047367954

ABSTRACT:
A process for recovering crude oil from a subterranean formation comprising injecting into the formation a liquid composition consisting essentially of a specific surfactant in an aqueous medium and injecting a gas to urge the composition toward a production well. The surfactant has the general formula RCH.sub.2 CH.dbd.C(R)CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.m X, wherein R is C.sub.3 -C.sub.8 alkyl, m is an integer from 1 to 10, and X is a sulfonate, sulfate, glyceryl sulfonate, or carboxylate anion neutralized by a sodium, potassium, or ammonium cation.

REFERENCES:
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patent: 4203491 (1980-05-01), Reisberg
patent: 4436672 (1984-03-01), Naylor
patent: 4466891 (1984-08-01), McCoy
patent: 4485873 (1984-12-01), Balzer et al.
patent: 4534411 (1985-08-01), Morita et al.
patent: 4572294 (1986-02-01), Duerksen et al.
patent: 4676316 (1987-06-01), Mitchell

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