Oil recovery process employing cyclic wettability alteration

Details Oil recovery process employing cyclic wettability alteration Oil recovery process employing cyclic wettability alteration

1988-05-11

1989-06-27

Neuder, William P.

Wells

Processes

With indicating, testing, measuring or locating

356274, E21B 4322

Patent

active

048420654

ABSTRACT:
A surfactant solution is injected into an oil-wet fractured formation and becomes the preferred wetting phase of the matrix blocks in the formation thereby displacing oil from the matrix blocks into the fracture network. The formation is then flodded with water to displace the oil from the fracture network to the surface while returning the matrix blocks to an oil-wet condition. The injection cycle is repeated until the formation is depleted.

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