05060726 is referenced by 253 patents and cites 17 patents.

An apparatus and method are disclosed for producing thick tar sand deposits by preheating of thin, relatively highly conductive layers which are a small fraction of the total thickness of a tar sand deposit, with horizontal electrodes and steam stimulation. The preheating is continued until the viscosity of the tar in a thin preheated zone adjacent to the highly 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 and apparatus for producing tar sand deposits containing conductive layers having little or no vertical communication
Application Number
7/571391
Publication Number
5060726
Application Date
August 23, 1990
Publication Date
October 29, 1991
Inventor
John W Gardner
West University
TX, US
Harold J Vinegar
Houston
TX, US
Carlos A Glandt
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 43/30
E21B 43/24
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