Method of recovering hydrocarbons using single well...

Details Method of recovering hydrocarbons using single well... Method of recovering hydrocarbons using single well...

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01) E21B 43/16 (2006.01)

Patent

CA 2031814

Production of viscous hydrocarbons is initiated by first injecting an injection fluid down at least two tubing strings in a wellbore having multiple tubing strings therein. Following an initiation phase, flow of injection fluid in the production tubing string is ceased, and production of formation fluid to the surface commenced in the heated tubing. The production of formation fluids is controlled, and entry of uncondensed steam from the forma- tion into the wellbore avoided by maintaining a liquid level in the formation which is above the production perforations.

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