Geosteering in anisotropic formations using multicomponent...

G - Physics – 01 – V

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G01V 3/28 (2006.01)

Patent

CA 2599656

A multicomponent induction logging tool is used on a MWD bottomhole assembly (1221). Multifrequency focusing that accounts for the finite, nonzero, conductivity of the mandrel (1221) is applied. Using separation of modes, the principal components and relative dip angles in an anisotropic medium are determined. The results are used for reservoir navigation in anisotropic media.

Selon la présente invention, un appareil de diagraphie par induction à composantes multiples est utilisé sur un ensemble de fond du puits MWD (1221). Une focalisation à fréquence multiple qui prend en compte la conductivité finie non nulle du mandrin (1221) est appliquée. En utilisant la séparation des modes, les composants principaux et les angles d~inclinaison relatifs dans un milieu anisotrope sont déterminés. Les résultats sont utilisés pour une navigation en réservoir dans des milieux anisotropes.

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