Electrokinetic enhanced hydrocarbon recovery from oil shale
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United States of America Patent
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May 19, 2015
Grant Date -
Nov 1, 2012
app pub date -
Dec 22, 2011
filing date -
Dec 21, 2010
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Abstract
Disclosed herein are methods for extracting a kerogen-based product from subsurface (oil) shale formations. These methods rely on chemically modifying the shale-bound kerogen using a chemical oxidant so as to render it mobile. The oxidant is provided to a formation fluid in contact with the kerogen in the subsurface shale utilizing electrokinetic-induced migration. An electric field is generated through at least a portion of the kerogen rich zone to induce electrokinetic migration of the oxidant. A mobile kerogen-based product, that includes reaction products of kerogen conversion, is urged toward a production well utilizing electrokinetic-induced migration, and withdrawn from the subsurface shale formation. An electric field generated through at least a portion of the kerogen rich zone can also be utilized to induce migration of catalysts or catalyst precursors.
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