Methods of treating a tar sands formation are described herein. Methods for treating a tar sands may include providing heat to at least part of a hydrocarbon layer in the formation from one or more heaters located in the formation. The heat may be allowed to transfer from the heaters to at least a portion...http://www.google.com.au/patents/US20080128134?utm_source=gb-gplus-sharePatent US20080128134 - Producing drive fluid in situ in tar sands formations
