Fire flood process

Details Fire flood process Fire flood process

E - Fixed Constructions

21

B

166/37

E21B 43/24 (2006.01)

Patent

CA 1060788

IMPROVED FIRE FLOOD PROCESS Abstract of the Disclosure In an underground in situ combustion process for the recovery of oil from formations having high permeabilities, after combustion has been initiated, water containing a surfactant and air are injected under condi- tions such that the water upon contact with the hot formation vaporizes, creating slugs of condensible foam in an amount sufficient to generate a significant resistance factor of at least 5, which improves volumetric sweep efficiency by retarding the mobility of the steam and subsequent slugs of air. Air and water, including a surfactant, can be injected simultaneously as a mixture or as alternate slugs of water containing a surfactant and air.

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