A coal 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 pyrolysis temperature. A formation may be selected...http://www.google.es/patents/US6820688?utm_source=gb-gplus-sharePatente US6820688 - In situ thermal processing of coal formation with a selected hydrogen content and/or selected H/C ratio
In situ thermal processing of coal formation with a selected hydrogen ...
