08327932 is referenced by 44 patents and cites 1137 patents.

A method of recovering energy from a subsurface hydrocarbon containing formation includes introducing an oxidizing fluid in a wellbore positioned in at least a first portion of the formation. At least a portion of the first portion of the formation has been subjected to an in situ heat treatment process. The portion includes a treatment area having elevated levels of coke substantially adjacent the wellbore. The pressure in the wellbore is increased by introducing the oxidizing fluid under pressure such that the oxidizing fluid substantially permeates a majority of the treatment area and initiates a combustion process. Heat from the combustion process is allowed to transfer to fluids in the treatment area. Pressure decreases in the wellbore such that heated fluids from the portion of the formation are conveyed into the wellbore. The heated fluids are transferred to a heat exchanger configured to collect thermal energy.

Title
Recovering energy from a subsurface formation
Application Number
12/757632
Publication Number
8327932 (B2)
Application Date
April 9, 2010
Publication Date
December 11, 2012
Inventor
Richard Pollard
Pearland
TX, US
Robert Irving McNeil III
Cypress
TX, US
John Michael Karanikas
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 43/00
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