Patent ID: 9163491
Filing Date: 2015-10-20
Classification: E21B

Abstract:
1. A process to recover hydrocarbons from a hydrocarbon reservoir, namely bitumen, said process comprising; establishing a horizontal production well in the hydrocarbon reservoir; injecting an oxygen-containing gas in a first stream through a first injector and steam in a second stream through a second injector separate from the first stream but simultaneously and continuously into the hydrocarbon reservoir to cause heated hydrocarbons and water to drain, by gravity, to the horizontal production well; maintaining, when injecting the oxygen-containing gas and the steam, an oxygen/steam injectant gas ratio from 0.05 to 1.00 (v/v); and removing non-condensable combustion gases from hydrocarbon reservoir to avoid undesirable pressures in the hydrocarbon reservoir, wherein the non-condensable combustion gases are removed from at least one separate vent-gas well.