Method for in situ shale oil recovery

Details Method for in situ shale oil recovery Method for in situ shale oil recovery

1981-01-19

1983-04-12

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

405267, E21C 4110

Patent

active

043795935

ABSTRACT:
A method for the in situ processing of oil shale ore includes the establishment of underground stopes by removing from each a portion of the oil shale ore therein, rubblizing the remaining ore in each stope, extracting the rubblized ore and crushing it to obtain a desired particle size for subsequent processing, and restoring the sized oil shale particles to the stope by backfilling the stope as the rubble is extracted. The stope is maintained substantially filled with ore to provide lateral support to the side walls and reduce the likelihood of caving in the stope. The oil shale is retorted by injection of hot gas into the stope, and residual carbon is recovered from the retorted ore as producer fuel gas. The sensible heat in the ore may thereafter be recovered for use in retorting oil shale ore in an adjacent stope.

REFERENCES:
patent: 2481051 (1949-09-01), Uren
patent: 3460867 (1969-08-01), Cameron et al.
patent: 3765722 (1973-10-01), Crumb
patent: 4140181 (1979-02-01), Ridley
patent: 4234230 (1980-11-01), Weichman
patent: 4285547 (1981-08-01), Weichman

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