Secondary oil recovery

Details Secondary oil recovery Secondary oil recovery

B - Operations, Transporting

01

D

B01D 61/00 (2006.01) C02F 1/44 (2006.01) E21B 43/20 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2606596

A process for injecting water into a subterranean petroleum-bearing formation for petroleum recovery, said method comprising: a) positioning a selective membrane (14) between an aqueous solution (18) and formation water (20) having a higher solute concentration than the aqueous solution (18), such that water, passes across the membrane (14) by osmosis to dilute the formation water (20), b) injecting the diluted formation water (22) into the petroleum-bearing formation, c) recovering formation water from the petroleum-bearing formation, and d) using at least a portion of the recovered formation water in step a) .

L'invention concerne un procédé permettant d'injecter de l'eau dans une formation souterraine comprenant du pétrole aux fins de récupération de celui-ci, le procédé consistant: a) à positionner une membrane sélective entre une solution aqueuse et de l'eau de la formation possédant une concentration en solutés supérieure à celle de la solution aqueuse, de manière que l'eau passe sur la membrane par osmose, afin de diluer l'eau de la formation, b) à injecter l'eau de la formation diluée dans la formation souterraine comprenant du pétrole, c) à récupérer l'eau de la formation de la formation comprenant du pétrole et d) à utiliser au moins une partie de l'eau de la formation récupérée à l'étape a) .

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