Sour gas injection for use with in situ heat treatment
AssigneeShell Oil Company
InventorThomas David Fowler
Life of this patent
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Abstract
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method for providing acidic gas to a subsurface formation is described herein. The method may include providing heat from one or more heaters to a portion of a subsurface formation; producing fluids that include one or more acidic gases from the formation using a heat treatment process. At least a portion of one of the acidic gases may be introduced into the formation, or into another formation, through one or more wellbores at a pressure below a lithostatic pressure of the formation in which the acidic gas is introduced.
Claims20
A method for providing acidic gas to a subsurface formation, comprising:
- providing heat from one or more heaters to a portion of a subsurface formation;
- producing fluids from the formation using a heat treatment process, wherein the produced fluids comprise one or more acidic gases, wherein at least one of the acidic gases comprises hydrogen sulfide;
- and
- introducing at least a portion of the acidic gas comprising hydrogen sulfide into the formation, or into another formation, through one or more wellbores at a pressure below a lithostatic pressure of the formation in which the acidic gas is introduced.
A method for providing acidic gas to a subsurface formation, comprising:
- providing heat from one or more heaters to a portion of a subsurface formation;
- producing fluids from the formation using an in situ heat treatment process, wherein the produced fluids comprise one or more acidic gases;
- and
- introducing at least a portion of the acidic gases through a substantially horizontal portion of at least one wellbore positioned near or at the bottom of an aquifer in the formation, or positioned near or at the bottom of an aquifer in another formation.
Dependencies are inferred from the claim text.