Method for effectively handling CO.sub.2 -hydrocarbon gas mixtur

Details Method for effectively handling CO.sub.2 -hydrocarbon gas mixtur Method for effectively handling CO.sub.2 -hydrocarbon gas mixtur

1987-05-21

1988-05-17

Suchfield, George A.

Wells

Processes

Specific pattern of plural wells

166252, 166266, 166268, E21B 4330, E21B 4340, E21B 4700

Patent

active

047444177

ABSTRACT:
In a CO.sub.2 miscible displacement enhanced oil recovery process, produced CO.sub.2 -hydrocarbon gas containing from more than the maximum CO.sub.2 content tolerable in a fuel gas up to about 70 volume percent CO.sub.2 is reinjected into a small portion of the well pattern volume and produced CO.sub.2 -hydrocarbon gas containing more than 70 volume percent CO.sub.2 is reinjected into a larger portion of the well pattern volume. The method provides a more effective utilization of CO.sub.2 in a CO.sub.2 miscible enhanced oil recovery process while maintaining most of the oil-containing formation under miscible conditions.

REFERENCES:
patent: 3811503 (1974-05-01), Burnett et al.
patent: 3995693 (1976-12-01), Cornelius
patent: 4320802 (1982-03-01), Garbo
patent: 4415031 (1983-11-01), Hunt, III
patent: 4664190 (1987-05-01), Carpentier

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