Steam Flooding with Oxygen Injection, and Cyclic Steam Stimulation with Oxygen Injection
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Sep 27, 2012
filing date -
Oct 24, 2011
priority date (Note) -
Abandoned
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Abstract
A process to recover heavy oil from a hydrocarbon reservoir, said process comprising injecting oxygen-containing gas and steam separately injected via separate wells into the reservoir to cause heated hydrocarbon fluids to flow more readily to a production well, wherein:
- (i) the hydrocarbon is heavy oil (API from 10 to 20; with some initial gas injectivity(ii) the ratio of oxygen/steam injectant gas is controlled in the range from 0.05 to 1.00 (v/v)(iii) the process uses Cyclic Steam Stimulation or Steam Flooding techniques and well geometry, with extra well(s) or a segregated zone to inject oxygen gaswherein the oxygen contact zone within the reservoir is less than substantially 50 metres long.
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