Compositions for use in oil recovery and method of use

Details Compositions for use in oil recovery and method of use Compositions for use in oil recovery and method of use

1982-03-31

1985-02-05

Guynn, Herbert B.

Compositions

Leather or fur treating

166275, 26050113, E21B 4322

Patent

active

044977174

ABSTRACT:
Betaines containing the morpholine nucleus, some of which are novel per se, are dissolved in sea water or formation water, the concentration of betaine being from 200 to 100,000 ppm to give a surfactant solution suitable for displacing crude oil from a formation in an enhanced oil recovery process. Included in the solution can be an anionic surfactant containing in its structure an ethoxylated benzene ring which shows a synergistic effect with the betaine in lowering the interfacial tension of the surfactant solution against oil. These betaines have high tolerance towards divalent metal cations and high temperature stability as compared with betaines previously proposed for enhanced oil recovery.

REFERENCES:
patent: 2217846 (1940-10-01), Orthner et al.
patent: 3448128 (1969-06-01), Marumo et al.
patent: 3689470 (1972-09-01), Shachat
patent: 3873583 (1975-03-01), Walz et al.
patent: 3939911 (1976-02-01), Maddox, Jr. et al.
patent: 4193452 (1980-03-01), Wilson et al.
patent: 4216097 (1980-08-01), Stournas

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