Sweep improvement in enhanced oil recovery

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

E - Fixed Constructions

21

B

166/33

E21B 43/25 (2006.01)

Patent

CA 1221305

ABSTRACT A method for mobility control 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. The mixed surfactant comprises a lignosulfonate and a surfac- tant with strong foaming characteristics.

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