Oil recovery method

Details Oil recovery method Oil recovery method

1984-04-13

1985-04-02

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166270, 166274, 252 855D, E21B 4322

Patent

active

045081719

ABSTRACT:
Enhanced oil recovery process comprising the injection of an aqueous solution of an aldehyde and a sulfite into a subterranean formation to react with crude oil and form a surfactant in situ. In a preferred embodiment, an aldehyde/sulfite solution is followed by injection of an aqueous alcohol solution and then an aqueous mobility buffer.

REFERENCES:
patent: 3734187 (1973-05-01), Norton et al.
patent: 3760879 (1973-09-01), Norton et al.
patent: 4473118 (1984-09-01), Wauquier et al.

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