Pulsed in situ exothermic shock wave and retorting process...

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) C09K 8/60 (2006.01) E21B 43/247 (2006.01)

Patent

CA 2008826

PULSED IN SITU EXOTHERMIC SHOCK WAVE AND RETORTING PROCESS FOR HYDROCARBON RECOVERY ABSTRACT An active combustion zone is established in situ within a permeable hydrocarbon formation. The permeable formation is periodically charged with a combustible gas mixture, and is thereafter subjected to a high pressure pulse produced by detonation of the combustible gas mixture within an injection well. The combustible gas mixture is displaced through the permeable formation in advance of the combustion flame front in response to a high pressure pulse produced by detonation of the pressurized combustible gas mixture within the injection well. In the preferred embodi- ment, the combustible injection gas is a mixture of hydrogen gas and chlorine gas. As the hydrogen/chlorine gas mixture undergoes combustion, a large volume of high pressure, high temperature hydrogen chloride gas is produced, together with an aqueous solution of hydrochloric acid. The hydrochloric acid is forced into the surrounding permeable formation, and reacts with the carbonaceous materials to separate nitro- genous, sulphurous and arsenic compounds from the liquid oil product.

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