Cosurfactant in preflush for surfactant flood system

Details Cosurfactant in preflush for surfactant flood system Cosurfactant in preflush for surfactant flood system

1979-08-31

1981-06-23

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

E21B 4322

Patent

active

042744881

ABSTRACT:
In a post-primary oil recovery process involving the sequential addition of a saline preflush, a surfactant system comprising a surfactant, a cosurfactant and brine, the improvement comprising the addition of cosurfactant to the preflush. If desired, cosurfactant can also be added to a subsequent injected mobility buffer. The resulting system gives extraordinarily high recovery of oil.

REFERENCES:
patent: 3330344 (1967-07-01), Reisberg
patent: 3348611 (1967-10-01), Reisberg
patent: 3520365 (1970-07-01), Jones
patent: 3520366 (1970-07-01), Jones
patent: 3605891 (1971-09-01), Ayers, Jr.
patent: 3637017 (1972-01-01), Gale et al.
patent: 3885628 (1975-05-01), Reed et al.
patent: 3938591 (1976-02-01), Ossip et al.
patent: 3981361 (1976-09-01), Healy
patent: 4125156 (1978-11-01), Glinsmann

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