Enhanced oil recovery

Details Enhanced oil recovery Enhanced oil recovery

1983-07-18

1985-02-26

Clingman, A. Lionel

Compositions

Leather or fur treating

260504R, 260505R, 260505A, 260505C, 166273, E21B 4322

Patent

active

045016755

ABSTRACT:
Petroleum may be recovered from subterranean formation in an enhanced oil recovery process by utilizing an aqueous surfactant slug comprising a mixture of a sulfonate of a gas oil which has been obtained from the thermal cracking of coal, a lower alkyl alcohol containing from about 3 to about 6 carbon atoms and a non-ionic surfactant comprising an ethoxylated alcohol containing from about 12 to about 15 carbon atoms. The surfactant slug will be present in an amount sufficient to reduce the interfacial tension between the petroleum and water, thus enabling the petroleum to be recovered in an increased amount.

REFERENCES:
patent: 2227999 (1941-01-01), Brandt et al.
patent: 3508611 (1970-04-01), Davis, Jr. et al.
patent: 3536136 (1970-10-01), Jones
patent: 3970690 (1976-07-01), Suzuki et al.
patent: 3981361 (1976-09-01), Healy
patent: 4058467 (1977-11-01), Sias
patent: 4110229 (1978-08-01), Carlin et al.
patent: 4411802 (1983-10-01), Lester et al.
patent: 4414120 (1983-11-01), Malloy et al.

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