| 摘要 |
A method for the recovery of hydrocarbons from a hydrocarbon deposit overlying an aquifer, including injecting a hydrocarbon solvent in the vapour phase into the aquifer to mobilize hydrocarbons in the hydrocarbon deposit; and producing mobilized hydrocarbons from the hydrocarbon deposit. Mobilized hydrocarbons are produced from the aquifer, and the hydrocarbon solvent is injected along one or more predominantly horizontal injection wells in the aquifer that are spaced from and alternate with the production well or wells. The hydrocarbon solvent is a hydrocarbon solvent selected from the group consisting of ethane, propane, butane. Apparatus for the recovery of hydrocarbons from a hydrocarbon deposit overlying an aquifer, includes at least a first and preferably several injection wells drilled into the aquifer, the injection wells having a portion open to fluid communication with the aquifer; and at least a first production well and preferably several production wells drilled into one of the aquifer and the deposit, and spaced horizontally from the injection well, the first production well including a pump for pumping oil from the well. The injection wells and production wells preferably lie parallel to each other, spaced apart and alternate. A solvent recovery system is also preferably connected between adjacent injection wells and production wells. The injection and production wells preferably have a portion lying horizontally in the aquifer. The aquifer may be created by hydraulic fracturing of the base of the deposit.
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