Apparatus and method for downhole fluid separation

E - Fixed Constructions – 21 – B

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E21B 43/38 (2006.01) E21B 41/00 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2412931

A well (1) extending from the earth's surface (2) to an underground production formation (4) containing hydrocarbon oil and water, which well (1) above the production formation (4) is provided with a separation chamber (6) in which a static oil/water separator (10) is arranged comprising an inlet (12) to receive well fluid from an inlet well section (13) below the separation chamber (6), an outlet (15) for an oil-enriched component opening into the well section (16) above the separation chamber (6) and an outlet (18) for a water-enriched component opening into a discharge well section (19) below the separation chamber, wherein the height of the separation chamber (6) is larger than the thickness of the dispersion band that is formed under normal operation conditions.

L'invention concerne un puits (1) orienté depuis la surface de la terre (2) vers une formation de production souterraine (4) contenant de l'eau et un hydrocarbure liquide. Ce puits (1) est pourvu, au-dessus de la formation de production (4), d'une chambre de séparation (6) dans laquelle un séparateur (10) hydrocarbure/eau statique est disposé et comprend une entrée (12) de réception d'un fluide de puits provenant d'une section de puits d'entrée (13) sous la chambre de séparation (6), d'une sortie (15) pour un composant enrichi en hydrocarbure donnant sur la section (16) située au-dessus de la chambre de séparation (6) et d'une sortie (18) prévue pour un composant enrichi en eau et débouchant sur une section de puits de décharge (19) sous la chambre de séparation, dans laquelle la hauteur de la chambre de séparation (6) est supérieure à l'épaisseur de la bande de dispersion qui est formée dans des conditions de fonctionnement normal.

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