Sulfonate-cosurfactant mixtures for use in hard brines during oi

Details Sulfonate-cosurfactant mixtures for use in hard brines during oi Sulfonate-cosurfactant mixtures for use in hard brines during oi

1978-11-28

1981-05-12

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, E21B 4322

Patent

active

042666104

ABSTRACT:
Alkyl vinyl ether-maleic anhydride copolymers, alone or in combination with ethoxylated acids and/or ethoxylated amides and, optionally, together with polyalkoxylated carboxylic acids, polyalkoxylated amides and sulfated derivatives thereof, ethoxylated alkyl phenols, ethoxylated alcohols and the corresponding sulfated derivatives, sulfated aliphatic alcohols and alkylene oxide block copolymers, are useful to stabilize sulfonate surfactants, e.g., petroleum sulfonates, e.g., for use in tertiary oil recovery.

REFERENCES:
patent: 3493048 (1970-02-01), Jones
patent: 3500924 (1970-03-01), Poettmann
patent: 3508612 (1970-04-01), Reisberg et al.
patent: 3637494 (1972-01-01), Sullivan
patent: 3734187 (1973-05-01), Norton et al.
patent: 3768560 (1973-10-01), Hill et al.
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3827496 (1974-08-01), Schroeder
patent: 3856656 (1975-01-01), Flournoy et al.
patent: 4021356 (1977-05-01), Kudchadker et al.

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