Heavy oil recovery process using intermittent steamflooding

Details Heavy oil recovery process using intermittent steamflooding Heavy oil recovery process using intermittent steamflooding

E - Fixed Constructions

21

B

166/32

E21B 43/30 (2006.01) E21B 43/24 (2006.01)

Patent

CA 1264147

HEAVY OIL RECOVERY PROCESS USING INTERMITTENT STEAMFLOODING ABSTRACT This invention is a method for recovering viscous hydrocarbonaceous fluids from a subterranean formation containing one or more vertically extensive, narrow, high permeability conduits. At least one injection well communicates with at least one production well via said conduits. Steam is injected into said injection well until the water-oil ratio becomes excessive at the production well. The production well is then shut in until the formation is pressurized. Steam injection is then stopped and the production well is opened for production by pressure depletion. This cycle is repeated until oil recovery becomes uneconomical.

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