Downhole gas separation method and system

Details Downhole gas separation method and system Downhole gas separation method and system

B - Operations, Transporting

01

D

B01D 53/22 (2006.01) B01D 61/00 (2006.01) E21B 43/16 (2006.01) E21B 43/38 (2006.01)

Patent

CA 2453677

A method of separating a multi-component fluid in a wellbore uses at least one fluid separation membrane (21) having a feed side and a permeate side that is incorporated in the wellbore. A flowing stream (16) of the multi-component fluid obtained from a subterranean zone (11) being in fluid communication with the wellbore is passed across the feed side of the membrane (21) at a first pressure. A retentate stream (18) depleted in at least one component compared to the multi-component fluid is withdrawn from the feed side of the membrane (21) and passed to the earth's surface. A permeate stream (17), at a second pressure is withdrawn from the permeate side, in which the permeate stream (17) is enriched in at least one component compared with the multi-component fluid. The second pressure is controlled to maintain the second pressure below the first pressure.

L'invention concerne un procédé de séparation d'un fluide à composants multiples dans un puits au moyen, au moins, d'une membrane de séparation de fluide (21) possédant un côté alimentation et un côté perméat, cette membrane étant incorporée dans le puits. Un flux (16) du fluide à composants multiples, obtenu à partir d'une zone souterraine (11) en communication avec le puits, est passé, à une première pression, à travers la membrane (21) par son côté alimentation. Un flux de rétentat (18), appauvri d'au moins un composant par rapport au fluide à composants multiples, est soutiré du côté alimentation de la membrane (21) et ramené à la surface. Un flux de perméat (17), est soutiré, à une seconde pression, du côté perméat de la membrane, ce flux de perméat (17) étant enrichi en au moins un composant par rapport au fluide à composants multiples. La seconde pression est régulée de façon à la maintenir inférieure à la première pression.

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