Method of gas-cap air injection for thermal oil recovery

Method of gas-cap air injection for thermal oil recovery

Sanmiguel, J E and Toews, M A and Freeman, L W

US Patent 8,176,980 2012

Abstract : A method for producing bitumen or heavy oil from a subsurface oil sands reservoir, the subsurface oil sands reservoir and an overlying gas zone in fluid communication, the method includes providing an in situ combustion process in the overlying gas zone, to create łdots