Method for Viscous Hydrocarbon Production Incorporating Steam and Solvent Cycling
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
Apr 28, 2010
filing date -
Apr 29, 2009
priority date (Note) -
Abandoned
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Abstract
A method for producing hydrocarbons from a reservoir containing the hydrocarbon comprises a steam assisted gravity drainage (SAGD) incorporating cyclic steam, heavy (e.g. greater than C4) solvent and light (e.g. C2 to C4) solvent injection. The method involves a series of steps wherein the injection of the respective streams is varied. The method provides a significant improvement in hydrocarbon extraction efficiency as compared to a SAGD process alone and mitigates many of the drawbacks associated with typical SAGD operations.
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