Abstract: A process for the recovery of hydrocarbons from a hydrocarbon bearing formation and in which are situated an upper injection well and a lower production well is presented. The region between the wells is preheated by circulating hot solvent through at least part of both of the wells until hydraulic communication between both wells is achieved. Solvent is injected into the upper injection well at or above its critical temperature and the solvent is pentane or a mixture of butane and pentane. A hot solvent chamber is created consisting of solvent vapor and liquid. Bitumen and solvent are mixed at the boundary of the solvent chamber so formed. The hydrocarbon and solvent are caused to be mixed to drain downwards by gravity and sideways by pressure gradient towards the lower production well. The mixture is produced to the surface through the lower production well.

Abstract: 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, the method comprising the steps: preheating an area around and between the wells by circulating hot solvent through the completed interval of each of the wells until sufficient hydraulic communication between both wells is achieved; injecting one or more hydrocarbon solvents into the upper injection well at or above critical temperature of the solvent or solvent mixture, thereby causing a mixture of hydrocarbon and solvent to flow by gravity drainage to the lower production well; and producing the hydrocarbon to the surface through the lower production well. A non-condensable gas may be injected into the solvent chamber created by the hydrocarbon solvent.

Abstract: A process for the recovery of hydrocarbons from a hydrocarbon bearing formation and in which are situated an upper injection well and a lower production well is presented. The region between the wells is preheated by circulating hot solvent through at least part of both of the wells until hydraulic communication between both wells is achieved. Solvent is injected into the upper injection well at or above its critical temperature and the solvent is pentane or a mixture of butane and pentane. A hot solvent chamber is created consisting of solvent vapour and liquid. Bitumen and solvent are mixed at the boundary of the solvent chamber so formed. The hydrocarbon and solvent are caused to be mixed to drain downwards by gravity and sideways by pressure gradient towards the lower production well. The mixture is produced to the surface through the lower production well.

Abstract: 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, the method comprising the steps: preheating an area around and between the wells by circulating hot solvent 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, thereby causing a mixture of hydrocarbon and solvent to flow by gravity drainage to the lower production well; and producing the hydrocarbon to the surface through the lower production well.

Abstract: 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, the method comprising the steps: preheating an area around and between the wells by circulating hot solvent 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, thereby causing a mixture of hydrocarbon and solvent to flow by gravity drainage to the lower production well; and producing the hydrocarbon to the surface through the lower production well. A non-condensable gas may be injected into the solvent chamber created by the hydrocarbon solvent.

Abstract: 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, the method comprising the steps: preheating an area around and between the wells by circulating hot solvent 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, thereby causing a mixture of hydrocarbon and solvent to flow by gravity drainage to the lower production well; and producing the hydrocarbon to the surface through the lower production well.