A method for treating a hydrocarbon containing formation

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01) C09K 8/592 (2006.01) E21B 43/241 (2006.01)

Patent

CA 2406742

A method is disclosed for treating a hydrocarbon containing formation in situ and producing a hydrocarbon fluid from the formation, which method comprises pyrolysing hydrocarbons present in the formation at a pressure of at least 1.5 bar during the production of the hydrocarbon fluid from the formation. Optionally the method is followed by the step of producing synthesis gas which step comprises reacting the hydrocarbon containing formation which is partly depleted by the method according to the invention with a synthesis gas generating fluid. Optionally the synthesis gas so produced is converted into hydrocarbons and/or energy is generated by expanding and/or combusting the synthesis gas so produced or using it in a fuel cell.

L'invention concerne un procédé permettant, d'une part, de traiter, in situ, une formation à teneur en hydrocarbure et, d'autre part, de produire un fluide hydrocarboné à partir de la formation. Ce procédé consiste à réaliser une pyrolyse des hydrocarbures se trouvant dans la formation, à une pression d'au moins 1, 5 bars pendant la production du fluide hydrocarboné à partir de la formation. Eventuellement, le procédé est suivi d'une étape de production d'un gaz de synthèse. Cette étape consiste à faire réagir la formation à teneur en hydrocarbure, laquelle est partiellement appauvrie par le procédé décrit dans cette invention, à l'aide d'un fluide produisant un gaz de synthèse. Eventuellement, le gaz de synthèse ainsi produit est transformé en hydrocarbures et/ou de l'énergie est produite par expansion et/ou combustion du gaz de synthèse ainsi produit, ou ce gaz de synthèse est utilisé dans une pile à combustible.

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