In situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range
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United States of America Patent
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Jul 19, 2005
Grant Date -
Jul 24, 2003
app pub date -
Apr 24, 2002
filing date -
Apr 24, 2001
priority date (Note) -
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Abstract
An oil shale formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formation to a desired temperature. An average temperature and/or pressure within the formation may be controlled to inhibit production of hydrocarbons that have carbon numbers greater than a selected carbon number. In some embodiments, the selected carbon number may be 25. A small amount of hydrocarbons having carbon numbers greater than the selected carbon number may be entrained in vapor produced from the formation.
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