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Intelligent Magnetic Interference Diagnosis for Downhole Surveys
编号：80 访问权限：仅限参会人 更新：2026-09-23 13:52:56 浏览：1次 口头报告

报告开始：暂无开始时间（Asia/Shanghai）

报告时间：暂无持续时间

所在会场：[暂无会议] [暂无会议段]

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摘要
Measurement-while-drilling directional surveys can remain numerically plausible even when local magnetic interference, sensor bias, vibration, or an invalid geomagnetic reference has degraded azimuth quality. This paper presents a vibration-aware health-monitoring method for downhole magnetic-direction measurements using tri-axial magnetometer and accelerometer data, inclination, toolface, magnetic-field magnitude, dip angle, and geomagnetic-model residual. The protected magnetic-interference function is grounded in U.S. Patent 11 372 128 B2, while the added contribution is a reliability layer that combines data-validity gating, robust residuals, vibration context, cumulative exposure, uncertainty bounds, and graded fault-isolation logic. A normalized illustrative mission contains healthy operation, transients, progressive degradation beginning at 45 percent mission time, and a stronger disturbance after 75 percent. Across the healthy and degraded intervals, median absolute residual changes from 0.18 to 0.86, valid-data fraction from 0.99 to 0.94, health index from 0.91 to 0.43, and dominant-fault confidence from 0.17 to 0.82. Sensitivity tests varying residual weight by plus or minus 25 percent, exposure exponent from 1.5 to 3, and persistence window by a factor of two preserve the ordering of normal, advisory, degraded, and critical states. These normalized values demonstrate algorithm behavior rather than field accuracy. The method is intended for vibration-aware health assessment under variable downhole working conditions and provides a verification path from shadow-mode monitoring to controlled field deployment.
 
关键词
vibration sensing,magnetic interference,intelligent diagnosis,measurement while drilling,condition monitoring,multi-sensor fusion,uncertainty
报告人
ETHAN ZHAN
VP SINOPEC GROUP

稿件作者
ETHAN ZHAN SINOPEC GROUP
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重要日期

  • 会议日期

    11月06日

    2026

    至

    11月08日

    2026

  • 10月15日 2026

    初稿截稿日期

主办单位
IEEE Instrumentation and Measurement Society
承办单位
Sichuan University
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