04993490 is referenced by 31 patents and cites 18 patents.

A method for the production of bitumen from a subterranean reservoir having a zone of increased effective permeability therein. In particular, a first well is in fluid communication with the zone of increased effective permeability at a first level in the reservoir. Fluid communication is established between a second well and the zone of increased effective permeability at a second level above the first level in the reservoir. In-situ combustion is initiated in the reservoir proximate the second well. Combustion sustaining fluid is injected through the second well into the zone of increased effective permeability so that bitumens in the reservoir are mobilized by the in-situ combustion and flow downward through the reservoir towards the first well, through which they are recovered. By using this method, a stable in-situ combustion process is established which avoids fingering and channelling and accompanying early oxygen breakthrough, consequently improving the efficiency of bitumen production from the reservoir.

Title
Overburn process for recovery of heavy bitumens
Application Number
7/416554
Publication Number
4993490
Application Date
October 3, 1989
Publication Date
February 19, 1991
Inventor
Roland P Leaute
Calgary
CA
David J Stephens
London
GB
Agent
Pamela L Wilson
Assignee
Exxon Production Research Company
TX, US
IPC
E21B 43/243
E21B 43/24
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