Water-alternating-gas flooding of a hydrocarbon-bearing...

Details Water-alternating-gas flooding of a hydrocarbon-bearing... Water-alternating-gas flooding of a hydrocarbon-bearing...

E - Fixed Constructions

21

B

166/34

E21B 43/18 (2006.01) E21B 43/16 (2006.01) E21B 43/20 (2006.01)

Patent

CA 1305047

Docket 870038 000 WATER-ALTERNATING-GAS FLOODING OF A HYDROCARBON-BEARING FORMATION ABSTRACT A zone of a subterranean formation containing a low-viscosity crude oil which has already been waterflooded to completion is sequentially flooded with alternating slugs of produced gas and water to produce incremental amounts of the oil. The zone is characterized as a low-permeability zone having mixed geology, i.e., containing two or more rocks of differing permeability randomly distributed throughout the zone.

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