Method for viscous hydrocarbon production incorporating...

Details Method for viscous hydrocarbon production incorporating... Method for viscous hydrocarbon production incorporating...

E - Fixed Constructions

21

B

E21B 43/24 (2006.01) C09K 8/592 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2701437

A method for producing hydrocarbons from a reservoir containing the hydrocarbon comprises a steam assisted gravity drainage (SAGD) incorporating cyclic steam, heavy (e.g. greater than C4) solvent and light (e.g. C2 to C4) solvent injection. The method involves a series of steps wherein the injection of the respective streams is varied. The method provides a significant improvement in hydrocarbon extraction efficiency as compared to a SAGD process alone and mitigates many of the drawbacks associated with typical SAGD operations.

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