04691771 is referenced by 250 patents and cites 12 patents.

Oxygen is injected into a petroleum bearing subsurface formation penetrated by production well and the petroleum in the formation is subjected to in-situ combustion to heat the formation in a zone surrounding the production well. After heating by the in-situ combustion, heated hydrogen is injected into the heated formation zone by way of the production well. By way of another well penetrating the petroleum bearing subsurface formation and spaced from the production well, fluid is injected into the formation to drive petroleum in the formation between the two wells to the production well for recovery. Hydrogenation of the petroleum occurs in the heated zone in the presence of hydrogen therein.

Title
Recovery of oil by in-situ combustion followed by in-situ hydrogenation
Application Number
653905
Publication Number
4691771
Application Date
September 15, 1986
Publication Date
September 8, 1987
Inventor
Leslie C Rose
Rocky Mount
VA, US
Charles H Ware
Roanoke
VA, US
Agent
Arthur F Zobal
Assignee
WorldEnergy Systems
TX, US
IPC
E21B 43/30
E21B 43/243
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