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...http://www.google.de/patents/US6918443?utm_source=gb-gplus-sharePatent US6918443 - In situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range
