| 摘要 |
A method for extracting oil from a formation is disclosed. The method includes selecting a condensing solvent having a high vapour pressure at low temperatures and injecting the solvent into the formation. Then the solvent is condensed in the formation to deliver a latent heat of condensation to said oil and to mobilize said oil. The oil is then produced, and solvent is recovered from the produced oil. The recovered solvent is then conditioned for reinjection by being heated by means of a heat pump and compressor. Then it is reinjected into the formation. In a preferred aspect the thermal coefficient of production is greater than 1. An oil recovery system for carrying out the process is also disclosed.
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