Multiple transmitter and receiver well logging device with...

G - Physics – 01 – V

Patent

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G01V 3/08 (2006.01)

Patent

CA 2584585

A device and method for obtaining an electromagnetic propagation measurement of a subterranean geologic formation, with the formation being intersected by a borehole. The device comprises a transmitter for transmitting an electromagnetic signal and a first and second receiver for receiving the transmitted signal. The device further comprises a circuit for injecting a calibration signal into the first receiver and the second receiver, and a processor for processing the uncalibrated receiver signal and the calibration signal to obtain electromagnetic propagation measurement that is free from errors introduced by the receiving elements of the system. The processor may include a receiver data acquisition circuit for correcting data acquisition errors related to the first receiver and the second receiver.

L'invention concerne un dispositif et un procédé permettant d'obtenir une mesure de la propagation électromagnétique d'une formation géologique souterraine, la formation croisant un trou de forage. Le dispositif comprend un émetteur de signaux électromagnétiques et un premier et un second récepteurs de signaux électromagnétiques. Le dispositif comprend également un circuit permettant d'injecter un signal d'étalonnage dans le premier récepteur et dans le second récepteur, ainsi qu'un processeur permettant de traiter le signal de récepteur non étalonné et le signal étalonné pour fournir une mesure de la propagation électromagnétique sans erreurs introduites par les éléments récepteurs du système. Le processeur peut comprendre un circuit d'acquisition de données de récepteur permettant de corriger les erreurs d'acquisition de données liées au premier récepteur et au second récepteur.

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