Method of recovering viscous petroleum from thick tar sand

Details Method of recovering viscous petroleum from thick tar sand Method of recovering viscous petroleum from thick tar sand

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01)

Patent

CA 1065758

ABSTRACT OF THE DISCLOSURE METHOD OF 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 formed in a well by concentric casing and tubular members extending from the earth's surface through a substantial portion of the formation for conducting hot fluid to reduce the viscosity of the petroleum 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 the well for production up a production flow line exten- ding up the interior of the tubular member.

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