Borehole conductivity profiler

G - Physics – 01 – N

Patent

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Details

G01N 11/02 (2006.01) E21B 43/10 (2006.01) E21B 49/00 (2006.01) G01N 11/12 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2499638

A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A flexible liner is everted (turned inside out) into the borehole with an internal pressurized fluid. As the liner displaces the ambient fluid in the borehole into the surrounding formation, the rate of descent of the liner is recorded. As the impermeable liner covers the flow paths in the wall of the hole, the descent rate slows. From the measured descent rate, the flow rates out discrete sections of the borehole are determined.

La présente invention concerne un procédé pour utiliser une colonne perdue de puits à éversion afin d'effectuer des mesures de conductivité de fluide dans des matériaux entourant un tuyau, un tube ou une conduite, tel qu'un puits souterrain. Une colonne perdue souple est retournée vers l'extérieur dans le puits à l'aide d'un fluide sous pression interne. Lorsque la colonne perdue déplace le fluide qui l'entoure dans le puits à l'intérieur de la formation souterraine, la vitesse de descente de la colonne perdue est enregistrée. Lorsque la colonne perdue imperméable recouvre les voies d'écoulement dans la paroi du puits, la vitesse de descente diminue. Les vitesses d'écoulement hors de sections discrètes du puits sont alors déterminées à partir de la vitesse de descente mesurée.

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