Microemulsions which compatibly incorporate viscosifiers and the

Details Microemulsions which compatibly incorporate viscosifiers and the Microemulsions which compatibly incorporate viscosifiers and the

1979-07-02

1981-06-09

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

166275, 252 855D, E21B 4322

Patent

active

042719070

ABSTRACT:
To improve the sweep efficiency of a microemulsion flooding process to recover crude oil from a subterranean formation, a mobility control polymer is added to the microemulsion to increase its viscosity. To enable the compatible incorporation of the polymer and surfactant into the microemulsion, while still utilizing an aqueous component having a salinity near that of the formation, a microemulsion oil component is used for which the surfactant's optimal salinity is substantially higher than for reservoir crude oil.

REFERENCES:
patent: 3719606 (1973-03-01), Froning et al.
patent: 3827496 (1974-08-01), Schroeder
patent: 3981361 (1976-09-01), Healy
patent: 4125156 (1978-11-01), Gunsmann

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