Arrangement of wells for producing subsurface viscous petroleum

Details Arrangement of wells for producing subsurface viscous petroleum Arrangement of wells for producing subsurface viscous petroleum

E - Fixed Constructions

21

B

166/35

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

Patent

CA 1148855

ABSTRACT OF THE DISCLOSURE "ARRANGEMENT OF WELLS FOR PRODUCING SUBSURFACE VISCOUS PETROLEUM" A method is disclosed for recovering viscous crudes from petroleum-containing formation, such as tar sand deposits, which are too deep to mine economically but not deep enough, or geo- logically not structured properly, to successfully hydraulically fracture for well to well production. The method contemplates a field grid layout of sets of injection and production wells and a subsurface generally horizontal heated tubular member passing through the subsurface petroleum-containing formation. Heated fluids are circulated through the tubular members to heat the viscous crudes in the vicinity of the tubular members and a heated drive fluid is injected through the injection wells to move heated crude toward the production wells.

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