Tertiary recovery process

Details Tertiary recovery process Tertiary recovery process

1978-07-17

1980-06-17

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

166273, 252 855D, E21B 4322

Patent

active

042079462

ABSTRACT:
A process for recovering hydrocarbons from a hydrocarbon-bearing formation penetrated by an injection well and a production well which comprises injecting an aqueous solution of a vinylpyrrolidone polymer into the formation to condition the reservoir, in a first step injecting an aqueous surfactant solution into the formation and recovering hydrocarbons via the said production well. The pretreatment of the formation with the vinylpyrrolidone polymer reduces the consumption or loss of surfactant and thus improves the efficiency of the process. Optionally, after the injection of the aqueous surfactant solution an aqueous drive fluid is injected into the formation.

REFERENCES:
patent: 3421582 (1969-01-01), Falgetter
patent: 3500923 (1970-03-01), Reisberg
patent: 3749169 (1963-07-01), Tate
patent: 3776310 (1973-12-01), Norton et al.
patent: 3811507 (1974-05-01), Flournoy et al.
patent: 3948783 (1976-04-01), Szabo et al.
patent: 4018278 (1977-04-01), Shupe
patent: 4143716 (1979-03-01), Kalfoglou et al.

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