Method and system for increasing oil production from an oil...

Details Method and system for increasing oil production from an oil... Method and system for increasing oil production from an oil...

E - Fixed Constructions

21

B

E21B 43/40 (2006.01) E21B 43/38 (2006.01)

Patent

CA 2367712

A method and system for increasing oil production from an oil well producing a mixture of oil and gas at an elevated pressure through a wellbore penetrating an oil-bearing formation containing an oil-bearing zone and an injection zone, by separating at least a portion of the gas from the mixture of oil and gas to produce a separated gas and an oil- enriched mixture; utilizing energy from at least a portion of the mixture of oil and gas to compress at a surface at least a portion of the separated gas to produce a compressed gas having sufficient pressure to be injected into the injection zone; injecting the compressed gas into the injection zone; and recovering at least a major portion of the oil-enriched mixture

L'invention concerne un procédé et un système permettant d'augmenter la production de pétrole d'un puits produisant un mélange de pétrole et de gaz à une pression élevée par un forage s'introduisant dans une formation pétrolifère pourvue d'une zone pétrolifère et d'une zone d'injection. Le procédé consiste à séparer au moins une partie du gaz du mélange pétrole/gaz afin d'obtenir un gaz séparé et un mélange enrichi en pétrole, au moyen de l'énergie d'au moins une partie du mélange pétrole/gaz afin de comprimer, sur une surface, au moins une partie du gaz séparé pour produire un gaz comprimé ayant une pression suffisante pour être injecté dans la zone d'injection. Le procédé consiste ensuite à récupérer la majeure partie du mélange enrichi en pétrole.

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