Enhanced oil recovery process utilizing a lignosulfonate as a _s

Details Enhanced oil recovery process utilizing a lignosulfonate as a _s Enhanced oil recovery process utilizing a lignosulfonate as a _s

1982-11-22

1984-10-30

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4322

Patent

active

044795424

ABSTRACT:
To reduce the surfactant adsorption in a subterranean formation during a surfactant or microemulsion flooding process, lignosulfonate salts are injected into the formation after the surfactant solution has already been injected. The lignosulfonate afterflush may contain a thickener to promote better sweep efficiency, and water or brine will usually be used to drive the lignosulfonate salts through the reservoir to a production well.

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patent: 4271906 (1981-06-01), Bousaid et al.
patent: 4276933 (1981-07-01), Kudchadker et al.
patent: 4313500 (1982-02-01), Johnson, Jr. et al.
patent: 4384997 (1983-05-01), Detroit

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