A method for oil recovery from an oil field

E - Fixed Constructions – 21 – B

Patent

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E21B 43/16 (2006.01) C01B 3/36 (2006.01) C01B 3/38 (2006.01) C10G 2/00 (2006.01)

Patent

CA 2509944

A method for increasing oil recovery from an oil reservoir in which method surplus gas streams from a plant for synthesis of higher hydrocarbons from natural gas is injected into the reservoir, is described. The surplus streams from the plant is the tailgas from the synthesis and optionally nitrogen from an air separation unit which delivers oxygen or oxygen enriched air to the plant for synthesis of higher hydrocarbons.

L'invention concerne un procédé destiné à améliorer la récupération du pétrole à partir d'un réservoir de pétrole. Selon ce procédé, les flux de gaz excédentaires provenant d'une installation de synthèse d'hydrocarbures supérieurs à partir d'un gaz naturel sont injectés dans le réservoir. Les flux excédentaires provenant de l'installation sont le gaz résiduaire résultant de la synthèse et éventuellement de l'azote provenant d'une unité de séparation d'air acheminant de l'oxygène ou de l'air enrichi en oxygène vers l'installation en vue d'une synthèse d'hydrocarbures supérieurs.

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