Sweep improvement in enhanced oil recovery
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United States of America Patent
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-
Nov 3, 1987
Issued Date -
N/A
app pub date -
Feb 21, 1986
filing date -
Dec 28, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for sweep improvement during enhanced oil recovery in a subterranean oil-bearing formation concerns the generation of foam by the dispersion of the displacing fluid in an aqueous solution of a mixed surfactant system. The mixed surfactant system comprises a lignosulfonate foaming agent and a surfactant foaming agent.
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