Process for recovering shale oil

Details Process for recovering shale oil Process for recovering shale oil

1977-12-30

1979-06-19

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

166259, 166261, E21B 4324, E21C 4110

Patent

active

041584678

ABSTRACT:
An improved process for recovering shale oil from in-situ shale comprising the steps of: (1) mining a first portion of said shale; (2) fragmenting a second portion of said shale; (3) introducing into said second portion a mixture of gases comprising a molecular oxygen supplying gas, carbon dioxide and hydrogen sulfide while maintaining a temperature sufficient to convert kerogen in said second portion to shale oil and to produce carbon dioxide, hydrogen sulfide, gaseous hydrocarbons and other combustion and inert gases; (4) separating said shale oil from an offgas containing said carbon dioxide, hydrogen sulfide, gaseous hydrocarbons and other combustion and inert gases; (5) separating hydrogen sulfide and a first portion of carbon dioxide from a gas of low sulfur content and increased heating value comprising said gaseous hydrocarbons and other combustion and inert gases and a second portion of said carbon dioxide; and (6) recycling said hydrogen sulfide and said first portion of said carbon dioxide to step (3).

REFERENCES:
patent: 3661423 (1972-05-01), Garret
patent: 3994343 (1976-11-01), Cha et al.
patent: 4014575 (1977-03-01), French et al.
patent: 4082146 (1978-04-01), Compton et al.
"Schematic Drawing Showing Processing and Utilization of Sour Gas", The Oil Weekly, 9-21-42, p. 19.

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