Carbon dioxide injection with in situ combustion process for hea

Details Carbon dioxide injection with in situ combustion process for hea Carbon dioxide injection with in situ combustion process for hea

1984-12-24

1987-03-17

Suchfield, George A.

Wells

Processes

In situ combustion

166263, E21B 43243

Patent

active

046499970

ABSTRACT:
The invention process is a method of conducting in situ combustion in heavy oil or tar sand reservoirs wherein carbon dioxide is injected into the formation prior to, during, or prior to and during in situ combustion. The carbon dioxide may be injected concurrently with the injection of the oxygen-containing gas or the oxygen-containing gas and carbon dioxide may be injected in alternate slugs. The injection of carbon dioxide aids in situ combustion by lowering the viscosity of the oil, creating channels in the heavy oil deposits for the passage of the oxygen-containing gas and increasing the mobility of oil ahead of the combustion front.

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