Secondary oil recovery

Details Secondary oil recovery Secondary oil recovery

2011-05-17

2011-05-17

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Producing the well

C166S075120, C166S090100, C166S267000

Reexamination Certificate

active

07942205

ABSTRACT:
A process for injecting water into a subterranean petroleum-bearing formation for petroleum recovery, said method comprising: a) positioning a selective membrane (14) between an aqueous solution (18) and formation water (20) having a higher solute concentration than the aqueous solution (18), such that water passes across the membrane (14) by osmosis to dilute the formation water (20), b) injecting the diluted formation water (22) into the petroleum-bearing formation, c) recovering formation water from the petroleum-bearing formation, and d) using at least a portion of the recovered formation water in step a).

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patent: 0212675 (2002-02-01), None

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