Method and apparatus for producing tar sand deposits containing conductive layers
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United States of America Patent
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Aug 27, 1991
Grant Date -
N/A
app pub date -
Aug 23, 1990
filing date -
Aug 23, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method are 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, with horizontal 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.
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