04926941 is referenced by 265 patents and cites 14 patents.

A method is disclosed for producing thick tar sand deposits by preheating of thin, relatively conductive layers which are a small fraction of the total thickness of a tar sand deposit. The thin conductive layers serve to confine the heating within the tar sands to a thin zone adjacent to the conductive layers even for large distances between rows of electrodes. The preheating is continued until the viscosity of the tar in a thin preheated zone adjacent to the conductive layers is reduced sufficiently to allow steam injection into the tar sand deposit. The entire deposit is then produced by steam flooding.

Title
Method of producing tar sand deposits containing conductive layers
Application Number
7/419172
Publication Number
4926941
Application Date
October 10, 1989
Publication Date
May 22, 1990
Inventor
Michael Prats
Houston
TX, US
Harold J Vinegar
Houston
TX, US
Carlos A Glandt
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 43/24
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