Surfactant waterflooding enhanced oil recovery process

Details Surfactant waterflooding enhanced oil recovery process Surfactant waterflooding enhanced oil recovery process

1981-11-05

1984-07-17

Guynn, Herbert B.

Wells

Receptacles

With separate air chamber having openable passage

166273, 166274, 166275, E21B 4322

Patent

active

044604815

ABSTRACT:
Disclosed is a surfactant waterflooding enhanced oil recovery process and surfactant fluid suitable for use in an enhanced oil recovery process which accomplishes an increase in the amount of oil recovered over prior art methods. The surfactant fluid contains an alkylpolyalkoxy sulfate or alkylarylpolyalkoxy sulfate, or an alkylpolyalkoxyalkylene sulfonate or alkylarylpolyalkoxyalkylene sulfonate, either alone or in combination with an organic sulfonate anionic surfactant, such as petroleum sulfonate. The optimum average degree of ethoxylation of the alkoxy sulfate or alkoxy sulfonate surfactant is identified, and the surfactant fluid is formulated with a mixture of ethoxylated and sulfated or ethoxylated and sulfonated surfactants, having a broad even range of degree of ethoxylation.

REFERENCES:
patent: 3508612 (1970-04-01), Reisberg et al.
patent: 3827497 (1974-08-01), Dycus et al.
patent: 3977471 (1976-08-01), Gale et al.
patent: 4018278 (1977-04-01), Shupe
patent: 4066124 (1978-01-01), Carlin et al.
patent: 4088189 (1978-05-01), Shupe

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