Enhanced oil recovery by altering wettability

Details Enhanced oil recovery by altering wettability Enhanced oil recovery by altering wettability

E - Fixed Constructions

21

B

E21B 43/24 (2006.01) E21B 43/16 (2006.01)

Patent

CA 2250648

A process is disclosed for enhancing oil recovery in oil-containing reservoirs formed of water-wet sand. The process involves placing oil-wet sand in the near-bore region of a production well. The process can be used to provide an improvement to both a conventional pressure driven fluid drive process and a conventional steam-assisted gravity drainage process. In the fluid drive process, the drive fluid is injected intermittently.

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