Process for oil recovery from subterranean reservoir rock format

Details Process for oil recovery from subterranean reservoir rock format Process for oil recovery from subterranean reservoir rock format

1986-06-27

1988-02-02

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166275, 252 8554, E21B 4322

Patent

active

047223960

ABSTRACT:
Oil is extracted from subterranean reservoir rock formations by injection of a solution or dispersion of a carboxymethylated oxalkylate R--(OC.sub.3 H.sub.6).sub.m (OC.sub.2 H.sub.4).sub.n OCH.sub.2 COOM in admixture with a more hydrophobic tenside, for example a mono- or dialkylbenzenesulfonate, a petroleum sulfonate or an alkanesulfonate. The process is especially suited for reservoirs governed by strong temperature fluctuations or by a temperature gradient.

REFERENCES:
patent: 4293428 (1981-10-01), Gale et al.
patent: 4448697 (1984-05-01), McCoy et al.
patent: 4457373 (1984-07-01), Balzer et al.
patent: 4478281 (1984-10-01), Balzer et al.
patent: 4485873 (1984-12-01), Balzer et al.
patent: 4501675 (1985-02-01), Malloy et al.
patent: 4542790 (1985-09-01), Balzer
patent: 4561501 (1985-12-01), Shaw et al.
patent: 4582138 (1986-04-01), Balzer

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