Operation of an in situ oil shale retort

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01) E21B 43/247 (2006.01)

Patent

CA 1096301

1. BE IT KNOWN THAT CHANG YUL CHA of 1904 Glenmont Dr., Bakersfield, CA 93309 United States of America and ROBERT S. BURTON, III of 565 McMullin Drive, Grand Junction, Colorado 81501, United States of America having made an invention entitled: "IN SITU OIL SHALE RETORTING" the following disclosure contains a correct and full description of the invention and of the best mode known to the inventors of taking advantage of the same. ABSTRACT An in situ oil shale retort containing a fragmented permeable mass of formation particles containing oil shale is formed in a subterranean formation. The void fraction of the fragmented mass is from about 10 to about 25 per cent, and the weight average diameter of particles in the fragmented mass is from about 0.02 to about 0.3 foot (6 to 90mm). A combustion zone is established in the fragmented mass and combustion zone feed the combustion zone, at a rate such as to maintain the modified Reynolds number of gas passing through the combustion zone at a value ranging from about 0.1 to about 20.

321360

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