Enhanced oil recovery

Details Enhanced oil recovery Enhanced oil recovery

1981-09-08

1983-10-25

Guynn, Herbert B.

Compositions

Leather or fur treating

166275, 260505C, E21B 4322

Patent

active

044118023

ABSTRACT:
The recovery of residual oil which is found in subterranean reservoirs may be accomplished by utilizing an aqueous surfactant slug to reduce the interfacial tension between the oil and water. A surfactant slug which may be used will comprise a mixture of a neutralized sulfonate derivative from powdered coal, a lower alkyl alcohol which possesses from about 3 to about 6 carbon atoms and a non-ionic surfactant comprising an ethoxylated n-alcohol possessing from about 12 to about 15 carbon atoms. The surfactant slug will possess relatively low interfacial tension which may be in the range of from below 10.sup.-3 dynes per cm.

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patent: 3981361 (1976-09-01), Healy
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patent: 4013569 (1977-03-01), Chiu et al.
patent: 4058467 (1977-11-01), Sias
patent: 4110229 (1978-08-01), Carlin et al.
patent: 4214999 (1980-07-01), Carlin et al.

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