Treating tar sands formations with dolomite
First Claim
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1. A method for treating a formation containing dolomite and hydrocarbons, comprising:
- providing heat at less than the decomposition temperature of dolomite from one or more heaters located in an opening in the formation to at least a portion of the formation;
providing heat at or higher than the decomposition temperature of dolomite in another portion of the formation to produce carbon dioxide, the heating being provided such that the carbon dioxide mixes with hydrocarbons in the formation and reduces the viscosity of such hydrocarbons;
mobilizing hydrocarbon fluids in the formation; and
producing hydrocarbon fluids from the formation.
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Abstract
Methods for treating a tar sands formation are described herein. The tar sands formation may include dolomite and hydrocarbons. Methods may include providing heat at less than the decomposition temperature of dolomite from one or more heaters to at least a portion of the formation. At least some of the hydrocarbon fluids are mobilized in the formation. At least some of the hydrocarbon fluids may be produced from the formation.
1101 Citations
25 Claims
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1. A method for treating a formation containing dolomite and hydrocarbons, comprising:
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providing heat at less than the decomposition temperature of dolomite from one or more heaters located in an opening in the formation to at least a portion of the formation; providing heat at or higher than the decomposition temperature of dolomite in another portion of the formation to produce carbon dioxide, the heating being provided such that the carbon dioxide mixes with hydrocarbons in the formation and reduces the viscosity of such hydrocarbons; mobilizing hydrocarbon fluids in the formation; and producing hydrocarbon fluids from the formation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for treating a formation containing dolomite and hydrocarbons, comprising:
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injecting steam into the formation prior to heating the formation; providing heat at less than the decomposition temperature of dolomite from one or more heaters located in an opening in the formation to at least a portion of the formation; mobilizing hydrocarbon fluids in the formation; and producing hydrocarbon fluids from the formation. - View Dependent Claims (12, 13, 14, 15)
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16. A method for treating a formation containing dolomite and hydrocarbons, comprising:
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providing heat at less than the decomposition temperature of dolomite from one or more heaters located in an opening in the formation to at least a portion of the formation, wherein heating the formation with the one or more heaters creates injectivity in the formation; injecting steam in the formation; mobilizing hydrocarbon fluids in the formation; and producing hydrocarbon fluids from the formation. - View Dependent Claims (17, 18, 19, 20)
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21. A method for treating a formation containing dolomite and hydrocarbons, comprising:
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providing heat at less than the decomposition temperature of dolomite from one or more heaters located in an opening in the formation to at least a portion of the formation; controlling a pressure in the formation to control the decomposition of dolomite in the formation, wherein the formation comprises water; mobilizing hydrocarbon fluids in the formation; and producing hydrocarbon fluids from the formation. - View Dependent Claims (22, 23, 24, 25)
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Specification