System and method for installation and use of devices in...

E - Fixed Constructions – 21 – B

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E21B 49/10 (2006.01) E21B 33/124 (2006.01) E21B 41/00 (2006.01) G01V 11/00 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2501480

Making measurements with a main borehole and a microborehole extending from the main boehole into the formation, is performed with sensing devices positioned to measure at zones located in the microborehole. One or more packers can be installed in the microborehole to hydraulically isolate the measurement zones from each other and/or main borehole. In a microborehole fluid samples can be taken, fluid tracers be injected and various sensors including geophones can be incorporated.

L'invention concerne des procédés et des systèmes permettant d'effectuer des mesures relatives à une formation rocheuse comprenant un forage principal, un microforage s'étendant dans la formation rocheuse à partir du forage principal, et un ou plusieurs dispositifs de détection, placés et adaptés de manière à effectuer des mesures dans des zones de mesure situées dans le microforage. Une garniture d'étanchéité peut également être installée dans le microforage, ladite garniture d'étanchéité étant dimensionnée et adaptée de manière à assurer l'isolation hydraulique des zones de mesure des conditions présentes dans d'autres parties du microforage et/ou du forage principal. L'invention a également trait à des procédés et à des systèmes permettant de prélever des échantillons de fluide et d'injecter des traceurs de fluide dans un microforage.

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