In situ thermal processing of a coal formation to increase a permeability/porosity of the formation
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United States of America Patent
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Mar 15, 2005
Grant Date -
Jun 10, 2004
app pub date -
Apr 24, 2001
filing date -
Apr 24, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coal formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H.sub.2, 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 pyrolysis temperature. Heat may increase a permeability of the formation. The permeability may increase uniformly throughout the treated formation. The permeability of the treated portion may increase to a relatively high permeability as compared to an initial permeability of the untreated coal formation. The porosity of the treated formation may also uniformly increase.
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