Water-external microemulsion and method of recovering oil therew

Details Water-external microemulsion and method of recovering oil therew Water-external microemulsion and method of recovering oil therew

1975-06-20

1976-10-05

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, 252 855D, E21B 4322

Patent

active

039839400

ABSTRACT:
A water-external microemulsion and a method of recovering crude oil therewith, the water-external microemulsion being one which comprises at least 90% by weight of an aqueous medium, an oil component and a surfactant comprising a C.sub.8-16 orthoxylene sulfonate in an amount greater than the critical micelle concentration to form the microemulsion. The water-external microemulsion allows for effective and efficient crude oil recovery by providing minimum adsorption and low oil-water interfacial tension.

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patent: 3734185 (1973-05-01), Jones
patent: 3799263 (1974-03-01), Prillieux et al.
patent: 3827497 (1974-08-01), Dycus et al.

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