Tracer release method for monitoring fluid flow in a well

Details Tracer release method for monitoring fluid flow in a well Tracer release method for monitoring fluid flow in a well

E - Fixed Constructions

21

B

E21B 47/10 (2006.01) E21B 27/02 (2006.01)

Patent

CA 2410398

A tracer release method for monitoring fluid flow in a well utilizes a deformable container comprising a liquid tracer material which container has an outlet which debouches into the neck portion of a venturi in a well conduit. The container has a wall which is at least partly exposed to the fluid pressure at the relatively wide in- or outlet of the venturi, so that an amount of tracer is injected continuously or discontinuously into the well effluents which is proportional to the pressure difference p across the venturi, which pressure difference p is indicative of the fluid density .rho. and squared fluid velocity .upsilon..

L'invention concerne un procédé de libération de traceur pour surveiller l'écoulement d'un fluide dans un puits, qui utilise un récipient déformable contenant une matière de traceur liquide ; ce récipient comporte un orifice de sortie qui débouche dans la partie rétrécie d'un venturi de conduit de puits. Le récipient comporte une paroi au moins partiellement exposée à la pression de fluide à l'orifice d'entrée ou de sortie, relativement large, du venturi, qui permet d'injecter de manière continue ou discontinue une quantité de traceur dans les effluents du puits ; cette quantité est proportionnelle à la différence de pression p dans le venturi, p indiquant la densité du fluide .rho. et la vitesse au carré du fluide .upsilon..

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