Alkaline polymer hot water oil recovery process

Details Alkaline polymer hot water oil recovery process Alkaline polymer hot water oil recovery process

1988-12-19

1990-01-09

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166272, 166273, 166274, 166303, E21B 4324

Patent

active

048921467

ABSTRACT:
The effectiveness of a water injection oil recovery process is increased by incorporating a viscosifying amount of a hydrophilic polymer in the injection fluid, together with from 0.005 to 2.0 percent by weight of an alkalinity agent, preferably sodium hydroxide, and from 0.01 to 5.0 percent by weight of an alkalinity stabilizing agent, preferably sodium carbonate. The hot alkaline polymer water flood is especially effective when applied after a steam flood to recover oil bypassed by the steam.

REFERENCES:
patent: 2813583 (1957-11-01), Marx et al.
patent: 3927716 (1975-12-01), Burdyn et al.
patent: 3977470 (1976-08-01), Chang
patent: 4291765 (1981-09-01), Gilchrist et al.
patent: 4495994 (1985-01-01), Brown et al.
patent: 4597443 (1986-07-01), Shu et al.
patent: 4646833 (1987-03-01), De Ruiter
patent: 4660641 (1987-04-01), Shen

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