Method of oil recovery by flooding employing betaine solutions

Details Method of oil recovery by flooding employing betaine solutions Method of oil recovery by flooding employing betaine solutions

1977-01-10

1978-05-23

Guynn, Herbert B.

Compositions

Leather or fur treating

166274, 166275, 26050113, E21B 4322

Patent

active

040909697

ABSTRACT:
A method of extracting mineral oil from subterranean formation by flooding comprising the steps of forcing an aqueous liquid into a subterranean formation containing mineral oil and displacing the mineral oil through at least one bore hole in the subterranean formation, said aqueous liquid containing from 0.01% to 15% by weight of an amphoteric surface-active compound selected from the group consisting of (1) a betaine having the formula ##STR1## wherein R.sub.1 and R.sub.2 are members selected from the group consisting of hydrogen and alkyl having from 1 to 18 carbon atoms, with the proviso that the sum of the carbon atoms in R.sub.1 + R.sub.2 is from 9 to 18, R.sub.3 and R.sub.4 are members selected from the group consisting of lower alkyl and lower alkylol, x is an integer from 2 to 4, y is an integer from 0 to 1 and z is an integer from 1 to 4, and (2) mixtures of said betaine with up to 20% by weight of an acid having the formula ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, x and z have the above-assigned values.

REFERENCES:
patent: 3275552 (1966-09-01), Kern et al.
patent: 3360550 (1967-12-01), Cowen et al.
patent: 3792731 (1974-02-01), Feuerbacher et al.
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3888797 (1975-06-01), Marumo
patent: 3939911 (1976-02-01), Maddox et al.

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