Steam-foam drive

Details Steam-foam drive Steam-foam drive

1991-08-30

1992-12-22

Suchfield, George A.

Wells

Processes

Cyclic injection then production of a single well

166269, 166272, 166303, 166309, E21B 4324

Patent

active

051727633

ABSTRACT:
The time delay experienced between the commencement of the steam-foam drive and the subsequent incremental increase in oil production rate is reduced by simultaneously (a) injecting steam into the lower level of a subterranean oil-bearing formation and (b) injecting foam into the upper elevation of the formation. Preferably, the elevation where the foam is injected is gradually lowered while maintaining the steam injection elevation substantially constant. The accelerated response rate improves the economics of the steam-foam drive.

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Mohammadi et al., "Characteristics of Steam-Foam Drive Process in Massive Multi-Zone and Thin Single-Zone Reservoirs," Presented at UNITAR/UNDP 5th Int. Conference on Heavy Crude and Tar Sands (Feb. 17-22, 1991) Caracas, Venezuela.

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