Surfactant-stabilized foams for enhanced oil recovery
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United States of America Patent
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Dec 24, 1991
Grant Date -
N/A
app pub date -
Jul 3, 1990
filing date -
Jul 3, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A foam is provided for use in a subterranean oil-bearing formation for reducing and controlling the mobility of a gaseous drive fluid. The foam is generated using an inert gas and a fluorocarbon surfactant solution in admixture with an amphoteric or anionic hydrocarbon surfactant solution. A relatively small amount of the fluorocarbon surfactant is operative, when mixed with the hydrocarbon surfactant and foamed, to generate a foam that has better stability when in contact with oil than a foam made with hydrocarbon surfactant alone.
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