Mining or in situ disintegration of hard material – Tunnel recovery of fluid material
Patent
1980-09-29
1983-02-08
Pate, III, William F.
Mining or in situ disintegration of hard material
Tunnel recovery of fluid material
299 13, E21C 4110, E21B 43263
Patent
active
043726151
ABSTRACT:
This invention relates to a method of recovering shale oil from a subterranean formation containing oil shale. Unfragmented formation is explosively expanded in a single round of explosions for moving formation located at about the center of a zone of unfragmented formation a greater distance in a given time interval after the beginning of the round than formation located in the unfragmented formation outward from about the center of the unfragmented formation.
The explosive expansion forms a fragmented mass of formation particles containing oil shale in the subterranean formation forming an in situ oil shale retort.
Gas is introduced into the fragmented permeable mass in the in situ oil shale retort for establishing a retorting zone in the fragmented permeable mass wherein oil shale is retorted to produce gaseous and liquid products, and for advancing the retorting zone through the fragmented mass. Gaseous and liquid products are withdrawn from the bottom of the retort.
REFERENCES:
patent: 3848927 (1974-11-01), Livingstone
patent: 3917346 (1975-11-01), Janssen
patent: 4043598 (1977-08-01), French
patent: 4045085 (1977-08-01), Garrett
patent: 4109964 (1978-08-01), Ridley
patent: 4153298 (1979-05-01), McCarthy
patent: 4194789 (1980-03-01), Studebaker
Occidental Oil Shale Inc.
Pate III William F.
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