THERMAL HYDROCARBON RECOVERY METHOD WITH NON-CONDENSABLE GAS INJECTION
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United States of America Patent
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Issued Date -
Jul 16, 2015
app pub date -
Jan 14, 2014
filing date -
Jan 14, 2014
priority date (Note) -
Abandoned
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Abstract
A method for recovering subsurface hydrocarbons, including heavy oil or bitumen, wherein a heated non-condensable gas such as nitrogen is injected downhole to heat the reservoir, followed by a steam injection step to heat the hydrocarbon to enable its flow to the wellbore and production to surface. The dual injection method can be repeated as desired to enhance production of the hydrocarbon resource, and in the case of cyclic steam stimulation would involve a period of shutting in the well after injection of the non-condensable gas and steam prior to the production phase.
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