| 摘要 |
A process for the recovery of hydrocarbon such as bitumen/EHO from a hydrocarbon bearing formation in which are situated an upper injection well and a lower production well 5, involves the steps of: preheating an area around and between the wells by circulating hot solvent 1 through the completed interval of each of the wells until sufficient hydraulic communication between both wells is achieved; injecting one of more hydrocarbon solvents into the upper injection well at or above critical temperature of the solvent or solvent mixture to create a solvent chamber, thereby causing a mixture of hydrocarbon and solvent to flow by downwards by gravity drainage and sideways by pressure to the lower production well 5; and producing the hydrocarbon to the surface through the lower production well 5. A non-compressible gas may also be injected into the solvent chamber. |
