Sweep improvement in enhanced oil recovery

Details Sweep improvement in enhanced oil recovery Sweep improvement in enhanced oil recovery

1986-02-21

1987-11-03

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166272, 166273, 166274, 166294, 252 8554, E21B 4324, E21B 4322, E21B 4700

Patent

active

047037970

ABSTRACT:
A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution of a mixed surfactant system. The mixed surfactant system comprises a lignosulfonate foaming agent and a surfactant foaming agent.

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