Determining the locus of a processing zone in a retort through c

Details Determining the locus of a processing zone in a retort through c Determining the locus of a processing zone in a retort through c

1977-05-13

1979-05-01

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166259, 299 2, E21B 4324, E21B 4700

Patent

active

041518772

ABSTRACT:
The locus of a processing zone advancing through a fragmented permeable mass of particles in an in situ oil shale retort in a subterranean formation containing oil shale is determined by withdrawing a sample of gas passing through the retort through a channel through unfragmented formation and in fluid communication with the retort, and analyzing the composition of withdrawn gas. The channel can be artificially formed such as by hydraulic fracturing of unfragmented formation, or can be a naturally occurring permeable layer such as a tuff bed in the formation containing oil shale.

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Carpenter, H. C., et al, "Retorting Ungraded Oil Shale as Related to in situ Combustion," ACS Preprint, vol. 15, 1971, Laramie Petroleum Research Center, Laramie, Wyoming, 14 pages.
Rothman, A. J., "Lawrence Livermore Laboratory Quarterly Report", Jul. 30, 1976.

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