Using tunnels for treating subsurface hydrocarbon containing formations
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United States of America Patent
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Apr 24, 2012
Grant Date -
Nov 5, 2009
app pub date -
Apr 10, 2009
filing date -
Apr 18, 2008
priority date (Note) -
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Abstract
A system for treating a subsurface hydrocarbon containing formation includes one or more tunnels having an average diameter of at least 1 m. At least one tunnel is connected to the surface. Two or more wellbores extend from at least one of the tunnels into at least a portion of the subsurface hydrocarbon containing formation. At least two of the wellbores contain elongated heat sources configured to heat at least a portion of the subsurface hydrocarbon containing formation such that at least some hydrocarbons are mobilized.
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