Gas seal for an in situ oil shale retort and method of forming thermal barrier
Patent
·
OSTI ID:864133
A gas seal is provided in an access drift excavated in a subterranean formation containing oil shale. The access drift is adjacent an in situ oil shale retort and is in gas communication with the fragmented permeable mass of formation particles containing oil shale formed in the in situ oil shale retort. The mass of formation particles extends into the access drift, forming a rubble pile of formation particles having a face approximately at the angle of repose of fragmented formation. The gas seal includes a temperature barrier which includes a layer of heat insulating material disposed on the face of the rubble pile of formation particles and additionally includes a gas barrier. The gas barrier is a gas-tight bulkhead installed across the access drift at a location in the access drift spaced apart from the temperature barrier.
- Research Organization:
- Occidental Oil Shale, Inc., Grand Junction, CO (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC20-78LC10036
- Assignee:
- Occidental Oil Shale, Inc. (Grand Junction, CO)
- Patent Number(s):
- 4,315,657
- Application Number:
- 06/131398
- OSTI ID:
- 864133
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/299/405/
access
access drift
additionally
adjacent
angle
apart
approximately
barrier
bulkhead
communication
containing
containing oil
disposed
drift
drift space
excavated
extends
formation
formation containing
formation particles
formed
forming
fragmented
fragmented permeable
gas
gas seal
gas-tight
heat
heat insulating
installed
insulating
insulating material
layer
location
mass
material
material disposed
method
oil
oil shale
particles
particles contain
particles containing
permeable
permeable mass
pile
provided
repose
retort
rubble
seal
shale
shale retort
situ
situ oil
spaced
spaced apart
subterranean
subterranean formation
temperature
thermal
thermal barrier
access
access drift
additionally
adjacent
angle
apart
approximately
barrier
bulkhead
communication
containing
containing oil
disposed
drift
drift space
excavated
extends
formation
formation containing
formation particles
formed
forming
fragmented
fragmented permeable
gas
gas seal
gas-tight
heat
heat insulating
installed
insulating
insulating material
layer
location
mass
material
material disposed
method
oil
oil shale
particles
particles contain
particles containing
permeable
permeable mass
pile
provided
repose
retort
rubble
seal
shale
shale retort
situ
situ oil
spaced
spaced apart
subterranean
subterranean formation
temperature
thermal
thermal barrier