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Title: Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top

Abstract

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.

Inventors:
 [1]
  1. (1904 Glenmont Dr., Bakersfield, CA 93309)
Issue Date:
OSTI Identifier:
863521
Patent Number(s):
4192552
Assignee:
Cha; Chang Y. (1904 Glenmont Dr., Bakersfield, CA 93309) OSTI
DOE Contract Number:  
ET-77-A-03-1848
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; establishing; combustion; zone; situ; oil; shale; retort; pocket; top; boundary; unfragmented; formation; containing; fragmented; permeable; mass; space; portion; establish; established; proximate; inlet; mixture; comprising; oxygen; introduced; propagate; upper; simultaneously; cool; fluid; prevent; overheating; thermal; sloughing; permeable mass; fragmented permeable; fragmented mass; situ oil; shale retort; combustion zone; oil shale; upper portion; unfragmented formation; mixture comprising; /299/166/

Citation Formats

Cha, Chang Y. Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top. United States: N. p., 1980. Web.
Cha, Chang Y. Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top. United States.
Cha, Chang Y. Tue . "Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top". United States. https://www.osti.gov/servlets/purl/863521.
@article{osti_863521,
title = {Method for establishing a combustion zone in an in situ oil shale retort having a pocket at the top},
author = {Cha, Chang Y.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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