Process for recovery of carbonaceous materials from subterranean

Details Process for recovery of carbonaceous materials from subterranean Process for recovery of carbonaceous materials from subterranean

1975-04-17

1976-09-14

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

299 4, 166259, 299 13, E21B 4324, E21B 4326

Patent

active

039803392

ABSTRACT:
Subterranean mineral deposits, such as oil shale or the like, are prepared for in-situ retorting by selectively mining out an area at the base of the deposit leaving an overlying deposit supported in a suitable manner such as by a plurality of pillars. The overlying deposit is expanded in any suitable manner into the underlying area in a fashion to create a predetermined distribution of permeability from an area of low permeability to an area of high permeability. An inlet is provided at the low permeability area and an outlet at the high permeability area. A suitable medium is introduced into the deposit at the low permeability end for extracting and forcing mineral values from the deposit toward the outlet end for recovery.

REFERENCES:
patent: 2761663 (1956-09-01), Gerdetz
patent: 3620301 (1971-11-01), Nichols et al.
patent: 3630283 (1971-12-01), Knutson et al.
patent: 3661423 (1972-05-01), Garret
patent: 3877373 (1975-04-01), Bergmann et al.
patent: 3902422 (1975-09-01), Coursen

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