Steam assisted gravity drainage processes with the addition of oxygen
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United States of America Patent
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Oct 20, 2015
Grant Date -
Apr 25, 2013
app pub date -
Sep 27, 2012
filing date -
Oct 21, 2011
priority date (Note) -
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Abstract
A steam assisted gravity drainage process that includes the addition of oxygen for recovering hydrocarbons from a hydrocarbon reservoir is described. Steam and an oxygen-containing gas are separately and continuously injected into the hydrocarbon reservoir to heat hydrocarbons and water to drain, by gravity, to a horizontal production well. The process can include controlling the ratio of oxygen and steam from about 0.05 to about 1.00 (v/v). The steam assisted gravity drainage process can further include removing non-condensable combustion gases from the reservoir to avoid undesirable pressures in the reservoir. The non-condensable combustion gases can be removed from the reservoir by at least one separate vent-gas well.
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