Micellar dispersions with tolerance for extreme water hardness f

Details Micellar dispersions with tolerance for extreme water hardness f Micellar dispersions with tolerance for extreme water hardness f

1976-05-24

1977-11-22

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166273, 252 855D, E21B 4322

Patent

active

040591549

ABSTRACT:
A novel, thickened, miscible flooding medium to displace petroleum in subterranean reservoirs is a dispersion of light hydrocarbons, water and a surfactant system. The water may have from about 1500 to 12,000 parts per million polyvalent ions such as calcium and/or magnesium. The surfactant system comprises a water soluble salt of an alkyl or an alkylaryl sulfonate plus a water soluble salt of an alkyl or alkylaryl polyethoxy sulfate anionic surfactant plus a nonionic surfactant such as a polyethoxylated alkyl phenol, a polyethoxylated aliphatic alcohol or a fatty acid mono or dialkanolamide.

REFERENCES:
patent: 3245467 (1966-04-01), Fitch
patent: 3406754 (1968-10-01), Gogarty
patent: 3508611 (1970-04-01), Davis, Jr. et al.
patent: 3688844 (1972-09-01), Roszelle
patent: 3811505 (1974-05-01), Flournoy et al.
patent: 3827496 (1974-08-01), Schroeder
patent: 3827497 (1974-08-01), Dycus et al.
patent: 3830301 (1974-08-01), Holm
patent: 3920073 (1975-11-01), Holm

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