MEASUREMENT OF VIBRATION DISPLACEMENT IN NMR LOGGING WHILE DRILLING

Yubin Sun, Li Kong, Jingjing Cheng

Abstract

The random vibration of the drill collar results in the additional attenuation to the NMR LWD signals, which will bring additional error in the process of T2 spectrum inversion. The determination of the displacement will help to recuperate the signals. This paper studied the property of the drill collar and proposed a scheme to determine the random vibration displacement which used two tri-axis vibration accelerometers and a two axis magnetometer. The simulation results and the shaking table test demonstrate that this scheme is effective and can be implemented in the instrument.

Keywords

measurement, random vibration, displacement, NMR LWD

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IMEKO-WC-2015-TC22-440.pdf

DOI

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IMEKO TC

TC22 - Vibration Measurement

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