Methods for treating a tar sands formation are disclosed herein. Methods for treating a tar sands formation may include providing heat to at least part of a hydrocarbon layer in the formation from one or more heaters located in the formation. Pressure may be allowed to increase in an upper portion of...http://www.google.ca/patents/US7677310?utm_source=gb-gplus-sharePatent US7677310 - Creating and maintaining a gas cap in tar sands formations
