Patent Number: 7,610,962

Title: Sour gas injection for use with in situ heat treatment

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.

Inventors: Fowler; Thomas David (Houston, TX)

Assignee: Shell Oil Company

International Classification: E21B 36/04 (20060101); E21B 43/24 (20060101); E21B 43/40 (20060101)

Expiration Date: 1/03/02017