Method for enhanced oil recovery through a horizontal...

Details Method for enhanced oil recovery through a horizontal... Method for enhanced oil recovery through a horizontal...

E - Fixed Constructions

21

B

E21B 43/16 (2006.01) E21B 43/243 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2088179

F-6524 pwr -1- A METHOD FOR ENHANCED OIL RECOVERY TROUGH A HORIZONTAL PRODUCTION WELL IN A SUBSURFACE FORMATION BY IN-SITU COMBUSTION ABSTRACT A horizontal production well is located in the lower portion of a heavy viscous oil-bearing reservoir. A vertical injection well is located in the upper portion of the reservoir. Oxygen-enriched gas is injected down the injector well and ignited in the upper portion of the reservoir to create a combustion zone that reduces viscosity of oil in the reservoir as the combustion zone advances downwardly toward the horizontal production well, the reduced-viscosity oil draining into the horizontal production well under force of gravity.

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