Azimuthal nmr imaging while drilling

Details Azimuthal nmr imaging while drilling Azimuthal nmr imaging while drilling

G - Physics

01

V

G01V 3/32 (2006.01)

Patent

CA 2595732

NMR measurements are made with a MWD tool having azimuthal sensitivity. The permanent magnet may be a U-shaped magnet or may have an opposed pair of magnets with axial orientation. The tool is designed for pulsing with short sequences for estimating BVI and CBW and minimizes the effect of tool motion.

L'invention se rapporte à un outil de mesure en cours de forage (MWD) à détection azimutale permettant d'effectuer des mesures par RMN. L'aimant permanent peut être un aimant en U, ou peut comprendre une paire d'aimants opposés présentant une orientation axiale. Cet outil est conçu pour émettre des impulsions par séquences brèves, afin d'estimer le volume apparent irréductible, et le volume d'eau liée aux argiles, et pour réduire les effets du déplacement de l'outil.

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