Method for initiating an in-situ recovery process by the...

Details Method for initiating an in-situ recovery process by the... Method for initiating an in-situ recovery process by the...

E - Fixed Constructions

21

B

166/36

E21B 43/24 (2006.01) E21B 43/243 (2006.01)

Patent

CA 1042784

METHOD FOR INITIATING AN IN-SITU RECOVERY PROCESS BY THE INTRODUCTION OF OXYGEN (D#71,200-DTA-113-F) ABSTRACT OF THE DISCLOSURE A method for starting a process to recover energy raw materials from a subterranean formation whereby igniters are injected into the upper region of the formation and inert gas is injected into the lower region of the formation, and thereafter an oxygen-containing gas is injected at a predetermined oxygen concentration and rate to initiate combustion, followed by increasing the oxygen concentration and/or rate of the injected gas to a maximum value. -I-

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