An oil shale formation may be treated using an in situ thermal process. Heat may be provided to the treatment area from one or more heat sources. A heat source may be positioned in an uncased wellbore. Heat may be allowed to transfer from the heat source to a section of the formation. Subsequently, hydrocarbons,...http://www.google.com/patents/US7051811?utm_source=gb-gplus-sharePatent US7051811 - In situ thermal processing through an open wellbore in an oil shale formation
In situ thermal processing through an open wellbore in an oil shale formation
