05339897 is referenced by 298 patents and cites 19 patents.

Disclosed are a method and apparatus for recovering and/or upgrading hydrocarbons utilizing in situ combustion and horizontal wells. Vertical injection wells are utilized to inject an oxidant into a reservoir for in situ combustion, with the combustion gases vented through vertical wells offset from the injection wells, thus causing the combustion front to travel toward the vertical offset wells. Production of hydrocarbons is through horizontal wells positioned beneath the vertical offset wells. Upgrading occurs when the horizontal wells are shut in and hot fluids injected through the offset wells into hydrocarbons that have accumulated at the bottom of the offset wells.

Title
Recovery and upgrading of hydrocarbon utilizing in situ combustion and horizontal wells
Application Number
7/989257
Publication Number
5339897
Application Date
December 11, 1992
Publication Date
August 23, 1994
Inventor
Roland P Leaute
Baton Rouge
LA, US
Assignee
Exxon Producton Research Company
TX, US
IPC
E21B 43/30
E21B 43/243
E21B 43/24
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