Downhole burner wells for in situ conversion of organic-rich...

E - Fixed Constructions – 21 – B

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E21B 43/243 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2682687

A method for in situ heating of an organic-rich rock formation is provided Preferably the organic-.pi.ch rock formation comprises kerogen. The method may include the steps of providing a first wellbore extending at least to a depth of the organic-rich rock formation, and providing a second wellbore also extending to a depth of the organic-rich rock formation and intersecting the first wellbore. The method may also include injecting air and a combustible fuel into the first wellbore, and providing a downhole burner in the wellbore so as to cause the air and the combustible fuel to mix and to combust at substantially the depth of the organic-rich rock formation. The method may further include circulating combustion products into and up the second wellbore.

L'invention concerne un procédé de réchauffement in situ d'une formation rocheuse riche en matières organiques. La formation rocheuse riche en matières organiques comprend, de préférence, du kérogène. Le procédé consiste à utiliser un premier puits de forage s'étendant au moins jusqu'à une profondeur de la formation rocheuse riche en matières organiques, et à utiliser un second puits de forage s'étendant également jusqu'à une profondeur de la formation rocheuse riche en matières organiques et croisant le premier puits de forage. Le procédé consiste également à injecter de l'air et un combustible dans le premier puits deforage, et à utiliser un brûleur de fond dans le puits de forage de manière à permettre le mélange et la combustion de l'air et du combustible sensiblement au niveau de la formation rocheuse riche en matières organiques. Le procédé consiste également à faire circuler les produits de combustion dans le second puits de forage.

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