Process for the recovery of oil from a natural oil reservoir

Details Process for the recovery of oil from a natural oil reservoir Process for the recovery of oil from a natural oil reservoir

E - Fixed Constructions

21

B

E21B 43/16 (2006.01) F25J 3/04 (2006.01)

Patent

CA 2447677

A method for recovering oil (24) from a natural oil reservoir (18) includes the steps of separating air to produce an oxygen rich stream (40) and a nitrogen rich stream (34) , providing a natural gas stream (12) and feeding at least part of the oxygen rich stream (40) and the natural gas stream (12) into a gas to liquid or GTL conversion installation (42) to produce hydrocarbon products (44) and heat. The heat produced in the gas to liquid conversion installation is used to produce energy (20) to pressurize (16) the nitrogen in the nitrogen rich stream (34) to produce a pressurized nitrogen rich stream (22). The pressurized nitrogen rich stream (22) is passed into a natural oil reservoir (18) to enhance the recovery of oil (24) from the reservoir.

L'invention concerne un procédé d'extraction d'hydrocarbures (24) dans un réservoir d'hydrocarbures bruts (18), consistant d'abord à séparer l'air pour produire un courant riche en oxygène (40) et un courant riche en azote (34), à fournir un courant de gaz naturel (12), et à injecter au moins une partie desdits courant riche en oxygène (40) et courant riche en gaz naturel (12) dans une installation de conversion de gaz/liquide (GTL) (42) pour obtenir des produits hydrocarbonés (44) et de la chaleur. La chaleur produite dans l'installation de conversion gaz/liquide est utilisée pour produire de l'énergie (20) servant à pressuriser (16) l'azote contenu dans le courant riche en azote (34), et produire ainsi un courant riche en azote pressurisé (22). Le courant riche en azote pressurisé (22) est passé dans un réservoir d'hydrocarbures bruts (18) pour améliorer l'extraction d'hydrocarbures (24) du réservoir.

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