Heating subsurface formations with fluids
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United States of America Patent
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Sep 11, 2012
Grant Date -
Apr 29, 2010
app pub date -
Oct 9, 2009
filing date -
Oct 13, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of treating a hydrocarbon formation includes providing heat to the hydrocarbon formation from a plurality of heaters. The heat transfers from the heaters so that at least a section the formation reaches a selected temperature. The section includes hydrocarbons having an API gravity below 10°. A solution including water is provided to the section. A temperature of the solution is at least 250° C. A pressure of the formation is maintained such that the water remains a liquid at 250° C. At least a some of the hydrocarbons in the section having an API gravity below 10° are contacted to produce hydrocarbon fluids. The hydrocarbon fluids in the section are mobilized. The hydrocarbon fluids include hydrocarbons having an API gravity of at least 10°.
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