Waterflooding employing amphoteric surfactants

Details Waterflooding employing amphoteric surfactants Waterflooding employing amphoteric surfactants

1977-07-15

1980-08-05

Guynn, Herbert B.

Compositions

Leather or fur treating

166274, 166275, E21B 4322

Patent

active

042160979

ABSTRACT:
Process for the recovery of oil from a subterranean oil reservoir involving the injection into the reservoir of an aqueous solution of an amphoteric surfactant having an inner quaternary ammonium group linked to a terminal sulfonate or carboxylate group. The amphoteric surfactants may be employed in relatively low concentrations within the range of 0.0005 to 0.1 weight percent and injected in a slug of at least 0.5 pore volume. The invention may be applied in situations in which the reservoir waters and/or the waters employed in formulating the surfactant solution contain relatively high amounts of divalent metal ions. Specifically disclosed amphoteric surfactants include hydrocarbyl dialkyl or dihydroxyalkyl ammonium alkane sulfonates and carboxylates in which the hydrocarbyl group contains from 8 to 26 carbon atoms.

REFERENCES:
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patent: 3219114 (1965-11-01), Oxford
patent: 3280179 (1966-10-01), Ernst
patent: 3349032 (1967-10-01), Krieg
patent: 3469630 (1969-09-01), Hurd et al.
patent: 3660470 (1972-05-01), Hirst
patent: 3939911 (1976-02-01), Maddox et al.
patent: 3977471 (1976-08-01), Gale et al.
patent: 4008768 (1977-02-01), Birk
patent: 4076743 (1978-02-01), Koch et al.
Parris et al., Article in Journal of the Oil Chemists Society, vol. 50, 9-12-73, pp. 509-512.

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