Heating tar sands formations to visbreaking temperatures
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United States of America Patent
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Dec 22, 2009
Grant Date -
Nov 20, 2008
app pub date -
Oct 19, 2007
filing date -
Oct 20, 2006
priority date (Note) -
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Abstract
Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. The heat may be controlled so that at least a majority of the section reaches an average temperature of between 200° C. and 240° C., which results in visbreaking of at least some hydrocarbons in the section. At least some visbroken hydrocarbon fluids may be produced from the formation.
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