In situ conversion process utilizing a closed loop heating...

E - Fixed Constructions – 21 – B

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E21B 43/24 (2006.01) E21B 36/00 (2006.01)

Patent

CA 2605729

The invention provides an in situ conversion system for producing hydrocarbons from a subsurface formation, that includes: a plurality of u-shaped wellbores in the formation; piping positioned in at least two of the u-shaped wellbores; a fluid circulation system coupled to the piping, and an electrical power supply. The fluid circulation system is configured to circulate hot heat transfer fluid through at least a portion of the piping to form at least one heated portion of the formation. The electrical power supply is configured to provide electrical current to at least a portion of the piping (220) located below an overburden in the formation to resistively heat at least a portion of the piping and the heat transfers from the piping to the formation. The invention also provides methods of using the in situ conversion system to produce hydrocarbons from the subsurface formation.

L~invention se rapporte à un système de conversion in situ pour produire des hydrocarbures à partir d~une formation de subsurface, qui comprend : une pluralité de puits en forme de u dans la formation ; une tuyauterie positionnée dans au moins deux des puits en forme de u ; un système de circulation de fluide couplé à la tuyauterie, et une alimentation en énergie électrique. Le système de circulation de fluide est configuré pour diffuser le fluide caloporteur chaud à travers au moins une partie de la tuyauterie afin de former au moins une partie chauffée de la formation. L~alimentation en énergie électrique est configurée pour fournir en courant électrique au moins une partie de la tuyauterie (220) située en dessous d~une sous-charge dans la formation pour chauffer par effet Joule au moins une partie de la tuyauterie et transférer la chaleur de la tuyauterie à la formation. L~invention fournit également des procédés d~utilisation du système de conversion in situ pour produire des hydrocarbures à partir d~une formation de subsurface.

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