In situ oil shale retorting process using introduction of gas at

Details In situ oil shale retorting process using introduction of gas at In situ oil shale retorting process using introduction of gas at

1977-04-04

1978-10-10

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

166251, 166259, E21B 4324, E21B 4326, E21C 4110

Patent

active

041193458

ABSTRACT:
Values are recovered from a subterranean in situ oil shale retort containing a fragmented permeable mass of formation particles by passing a measuring gas through the retort to determine the presence of a blockage in the fragmented mass. If there is such a blockage, only a portion of the fragmented mass is processed and the portion of the fragmented mass having the blockage is left unprocessed. This is effected by introducing a processing gas to the retort at an intermediate location between opposing ends of the fragmented mass and withdrawing gaseous and liquid products of processing at an end of the fragmented mass remote from such blockage.

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