Method for recovering oil from an underground formation

Details Method for recovering oil from an underground formation Method for recovering oil from an underground formation

E - Fixed Constructions

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B

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E21B 43/26 (2006.01) C09K 8/58 (2006.01) E21B 43/17 (2006.01) E21B 43/20 (2006.01)

Patent

CA 1128415

ABSTRACT METHOD FOR RECOVERING OIL FROM AN UNDERGROUND FORMATION Oil is recovered from an oil-wet underground formation consisting of permeable blocks surrounded by a fracture network by supplying to the fracture network an aqueous solution of a surfactant suitable to decrease the surface tension between water and oil.

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