Method for oil recovery by flooding with micellar dispersions co

Details Method for oil recovery by flooding with micellar dispersions co Method for oil recovery by flooding with micellar dispersions co

1975-03-27

1976-06-22

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166275, 252 855D, E21B 4322

Patent

active

039645487

ABSTRACT:
Improved oil recovery by flooding subterranean formations with micellar dispersions; comprised of hydrocarbon, water, cosurfactant, electrolyte, and petroleum sulfonate obtained by sulfonating whole or topped crude oil; is obtained by incorporating within the micellar dispersion about 1.5 to about 4.5 wt. % of active sulfonate groups (e.g. --SO.sub.3 NH.sub.4 or --SO.sub.3 Na) which are attached to the petroleum sulfonate. The micellar dispersions of this invention contain an amount of cosurfactant in excess of the amount required to produce a viscosity maximum with the particular micellar dispersion.

REFERENCES:
patent: 3302713 (1967-02-01), Ahearn et al.
patent: 3480080 (1969-11-01), Murphy
patent: 3497006 (1970-02-01), Jones et al.
patent: 3504744 (1970-04-01), Davis, Jr. et al.
patent: 3508611 (1970-04-01), Davis, Jr. et al.
patent: 3613786 (1971-10-01), Jones et al.
patent: 3740343 (1973-06-01), Jones et al.
patent: 3827496 (1974-08-01), Schroeder

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