Gas pre-injection for chemically enhanced oil recovery

Details Gas pre-injection for chemically enhanced oil recovery Gas pre-injection for chemically enhanced oil recovery

1980-04-03

1981-09-08

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166292, E21B 4322, E21B 3313

Patent

active

042879507

ABSTRACT:
A method for the chemically enhanced recovery of oil in which a gas is injected into the oil-bearing formation prior to the commencement of any surfactant flood. The pre-injection of gas allows the chemical flood to function more effectively and also permits the use of unthickened pushers and smaller surfactant banks.

REFERENCES:
patent: 2053285 (1936-09-01), Grebe
patent: 3244228 (1966-04-01), Parrish
patent: 3386506 (1968-06-01), Quance
patent: 3464491 (1969-09-01), Froning
patent: 3548940 (1970-12-01), Reguera et al.
patent: 3586107 (1971-06-01), Parrish
patent: 3599716 (1971-08-01), Thompson
patent: 3599717 (1971-08-01), McMillen
patent: 3653440 (1972-04-01), Reisberg
patent: 3794114 (1974-02-01), Brandon
patent: 3893511 (1975-07-01), Root

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