In situ retorting of oil shale and energy recovery

Wells – Processes – In situ combustion

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166259, 166267, 166303, 55 23, 299 2, 423573G, E21B 4324, E21C 4110

Patent

active

041695062

ABSTRACT:
Disclosed is a process for the in situ retorting of oil shale and energy recovery from generated off gases. An underground retort containing rubblized oil shale is subjected to retorting, thereby forming shale oil and off gases. The off gases are purified and burned in a gas turbine. Commonly this process comprises forming a subterranean in situ retort containing rubblized oil shale having a void space of about 5 to about 40 percent; passing a retorting gas through the in situ retort to effectively retort the oil shale and produce a mixture of shale oil and off gases; subjecting the mixture of shale oil and off gases to a preliminary separation to remove gross quantities of shale oil from the off gases; passing a portion of the off gases to a purification zone so as to remove off gas impurities which would be detrimental to the environment or the operation of downstream equipment; and passing a portion of the purified off gases to a gas turbine where said off gases are burned and power is generated.

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Perry; Robert H. et al., Chemical Engineers' Handbook, Fifth Edition, McGraw-Hill, 1973, pp. 18-90 to 18-92.
Ridley; Richard D. et al., In Situ Oil Shale Process Development, Quarterly of the Colorado School of Mines, vol. 70, Jul. 1975, No. 3, pp. 123-127.

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