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US 7,581,587 B2Granted
Method for in-situ combustion of in-place oils
AssigneePrecision Combustion, Inc.
InventorWilliam C. Pfefferle
Life of this patent
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Abstract
A novel method is provided for in situ combustion and recovery of oil from underground reservoirs including injecting air into the reservoir at a region near the reservoir floor, withdrawing combustion products from a region near the reservoir ceiling, and collecting oil from a horizontal production well near the reservoir floor.
Claims9
A method of in-situ combustion for recovery of oil from an underground oil reservoir comprising:
- a) injecting air into the reservoir via an injection well in a region near the reservoir floor;
- b) establishing a combustion front wherein hot combustion gases rise at the combustion front with combustion progressing from heel to toe;
- c) withdrawing combustion products from a region near the reservoir ceiling whereby heated oil drains to the reservoir floor;
- and
- d) collecting oil from a horizontal production well near the reservoir floor whereby the horizontal production well defines a heel proximate to the injection well.
2 more elements
Dependencies are inferred from the claim text.