Method and plant for increasing oil recovery by gas injection

E - Fixed Constructions – 21 – B

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E21B 43/16 (2006.01) C01B 3/34 (2006.01) C07C 29/151 (2006.01) C10G 2/00 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2458634

A method and a plant for simultaneous production of a gas for injection into an oil field and production of methanol, dimethyl ether and/or other oxygenated hydrocarbons or production of higher hydrocarbons from natural gas is disclosed. An air separation unit (ATR) for production of pure nitrogen for injection and pure oxygen for production of synthesis gas ("syngas") by authermal reformation of a natural gas is an essential part of the method and plant.

L'invention concerne un procédé et une installation permettant de produire simultanément un gaz destiné à être injecté dans un champ pétrolifère et du méthanol, de l'oxyde de diméthyle et/ou d'autres hydrocarbures oxygénés ou des hydrocarbures supérieurs provenant de gaz naturels. Une colonne de distillation d'air servant à la production d'azote pur destiné à l'injection et d'oxygène pur destiné à la production de gaz de synthèse par reformation autothermique d'un gaz naturel constitue une partie essentielle de ce procédé et de cette installation.

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