A method of controlling growth and heat loss of an in situ...

Details A method of controlling growth and heat loss of an in situ... A method of controlling growth and heat loss of an in situ...

E - Fixed Constructions

21

B

E21B 43/16 (2006.01)

Patent

CA 2639851

This invention is a solvent based gravity drainage process whereby the vertical growth rate of the chamber is restricted by placing, monitoring and managing a buoyant gas blanket at the top of the vapour chamber. This invention reduces the heat loss to the overburden as well as providing a means to preserve a barrier layer of bitumen saturated reservoir sand at the top of the pay zone in reservoirs where there is limited or no confining layer present.

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