Reservoir treatment by injecting mixture of CO.sub.2 and hydroca

Details Reservoir treatment by injecting mixture of CO.sub.2 and hydroca Reservoir treatment by injecting mixture of CO.sub.2 and hydroca

1976-01-20

1976-12-07

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166263, E21B 4318

Patent

active

039956938

ABSTRACT:
A process is provided in which hydrocarbon gas containing CO.sub.2 is injected into an oil containing reservoir as an aid in recovering oil from the reservoir. Oil can be produced from at least one production well in said reservoir while hydrocarbon gas containing less CO.sub.2 than the injected mixture of hydrocarbon gas and CO.sub.2 can be recovered from production wells other than the oil producing well. Backflowing of the injection well produces a gas containing more CO.sub.2 than the gas originally injected. The method provides an in situ separation of CO.sub.2 from hydrocarbon gas.

REFERENCES:
patent: 2623596 (1952-12-01), Whorton et al.
patent: 2875830 (1959-03-01), Martin
patent: 2875832 (1959-03-01), Martin
patent: 3811503 (1974-05-01), Burnett et al.
patent: 3823777 (1974-07-01), Allen et al.
patent: 3871451 (1975-03-01), Brown

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