Process and apparatus for enhanced hydrocarbon recovery

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2675807

A method for recovering hydrocarbons from a reservoir includes separating air into a nitrogen-rich gas and an oxygen-rich gas, oxidizing a hydrocarbon fuel with at least part of the oxygen-rich gas to produce steam and a CO2-rich gas, injecting at least part of the steam through an injection well into the reservoir to heat the hydrocarbons, purging the injection well with at least part of the nitrogen-rich gas, and injecting at least part of the CO2-rich gas into the reservoir containing the heated hydrocarbons.

L'invention concerne un procédé permettant de récupérer des hydrocarbures à partir d'un réservoir, le procédé inclut la séparation de l'air en un gaz riche en azote et en un gaz riche en oxygène, l'oxydation d'un carburant composé d'hydrocarbures avec au moins une partie du gaz riche en oxygène afin de produire de la vapeur et un gaz et riche en CO2, l'injection d'au moins une partie de la vapeur par l'intermédiaire d'un puits d'injection dans le réservoir afin de chauffer les hydrocarbures, la purge du puits d'injection avec au moins une partie du gaz riche en azote et l'injection d'au moins une partie du gaz riche en CO2 dans le réservoir contenant les hydrocarbures chauffés.

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