Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top
Patent
·
OSTI ID:863521
- 1904 Glenmont Dr., Bakersfield, CA 93309
An in situ oil shale retort having a top boundary of unfragmented formation and containing a fragmented permeable mass has a pocket at the top, that is, an open space between a portion of the top of the fragmented mass and the top boundary of unfragmented formation. To establish a combustion zone across the fragmented mass, a combustion zone is established in a portion of the fragmented mass which is proximate to the top boundary. A retort inlet mixture comprising oxygen is introduced to the fragmented mass to propagate the combustion zone across an upper portion of the fragmented mass. Simultaneously, cool fluid is introduced to the pocket to prevent overheating and thermal sloughing of formation from the top boundary into the pocket.
- Assignee:
- Cha; Chang Y. (1904 Glenmont Dr., Bakersfield, CA 93309)
- Patent Number(s):
- US 4192552
- OSTI ID:
- 863521
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/299/166/
boundary
combustion
combustion zone
comprising
containing
cool
establish
established
establishing
fluid
formation
fragmented
fragmented mass
fragmented permeable
inlet
introduced
mass
method
mixture
mixture comprising
oil
oil shale
overheating
oxygen
permeable
permeable mass
pocket
portion
prevent
propagate
proximate
retort
shale
shale retort
simultaneously
situ
situ oil
sloughing
space
thermal
top
unfragmented
unfragmented formation
upper
upper portion
zone
boundary
combustion
combustion zone
comprising
containing
cool
establish
established
establishing
fluid
formation
fragmented
fragmented mass
fragmented permeable
inlet
introduced
mass
method
mixture
mixture comprising
oil
oil shale
overheating
oxygen
permeable
permeable mass
portion
prevent
propagate
proximate
retort
shale
shale retort
simultaneously
situ
situ oil
sloughing
space
thermal
top
unfragmented
unfragmented formation
upper
upper portion
zone