Apparatus and method for wireline imaging in nonconductive muds

E - Fixed Constructions – 21 – B

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E21B 47/12 (2006.01) E21B 47/01 (2006.01) E21B 49/10 (2006.01)

Patent

CA 2581535

A pad mounted resistivity imaging device includes at least one transmitter and two or more arrays of receivers. Analysis of the received signals is done using either amplitude and phase differences between the arrays of receivers, or by analyzing amplitude and phase differences between the transmitters and the receivers. With operating frequencies in excess of 10 MHz, high resolution images of boreholes are obtained.

Un dispositif d'imagerie de la résistivité installé sur un support comprend au moins un émetteur et au moins deux réseaux de récepteurs. L'analyse des signaux reçus est effectuée soit par l'analyse des différences d'amplitude et de phase entre les réseaux de récepteurs soit par l'analyse des différences d'amplitude et de phase entre les émetteurs et les récepteurs. Avec des fréquences de fonctionnement supérieures à 10 MHz, on obtient des images à haute résolution des trous de sonde.

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