Recovering viscous petroleum from thick tar sand

Details Recovering viscous petroleum from thick tar sand Recovering viscous petroleum from thick tar sand

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01) E21B 36/00 (2006.01)

Patent

CA 1060339

ABSTRACT OF THE DISCLOSURE RECOVERING VISCOUS PETROLEUM FROM THICK TAR SAND Recovery of viscous petroleum such as from thick tar sands is assisted using a closed-loop flow path from the earth's surface through a substantial portion of the forma- tion for conducting hot fluid to reduce the viscosity of the patroleum in the formation to develop a potential passage in the formation outside the flow path into which a drive fluid is injected to promote movement of the petroleum to a production position.

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