Method for operating a production well in an oxygen driven in-situ combustion oil recovery process
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United States of America Patent
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-
Jul 8, 1986
Grant Date -
N/A
app pub date -
Dec 28, 1983
filing date -
Dec 28, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for operating a production well during an oxygen driven in-situ combustion oil recovery process comprising continuously injecting an inert gas such as nitrogen or carbon dioxide into the bottom of the production well at a predetermined low injection rate, preferably 0.1 to 2 MSCF/day, and continuously monitoring the oxygen concentration of the produced effluent gas and the bottomhole temperature of the production well. In the event that the oxygen content of the effluent gas increases to a value within the range of 5 to 20 volume percent or the bottomhole temperature of the production well increases to a value within the range of 200.degree. to 300.degree. F., the injection rate of the inert gas into the bottom of the production well is increased to a maximum rate until the oxygen concentration of the effluent gas and the bottomhole temperature are reduced to a safe level.
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