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Design and development of borehole three-component time-domain electromagnetic detection system.

Jiangjie Huang1, Haoqing Jiang1, Lihua Liu1

  • 1Key Laboratory of Electromagnetic Radiation and Sensing Technology, Aerospace Information Research Institution, Chinese Academy of Sciences, Beijing 100190, China.

The Review of Scientific Instruments
|June 12, 2026
PubMed
Summary

A new three-component time-domain electromagnetic detection system was developed for long-range underground borehole exploration. This system offers optimized control and high-precision data acquisition for enhanced wellbore imaging.

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Area of Science:

  • Geophysics
  • Electromagnetism
  • Borehole Geophysics

Background:

  • Underground wellbore environments present significant structural constraints for detection systems.
  • Long-range detection is crucial for effective borehole exploration and resource assessment.

Purpose of the Study:

  • To design and develop a robust three-component time-domain electromagnetic detection system for borehole applications.
  • To address the challenges of limited space and the need for long-range detection in underground wellbores.

Main Methods:

  • Integration of an adaptive passive constant voltage clamping electromagnetic pulse-transmission circuit.
  • Incorporation of multi-channel reception, master control circuits, a three-component transmitting coil, and low-noise magnetic field sensors.
  • System integration and experimental testing of the developed detection system.

Main Results:

  • Optimized control of high-power pulsed current excitation with fall-edge turn-off achieved.
  • Demonstrated three-component dynamic electromagnetic signal transmission capabilities.
  • High-precision multi-channel acquisition, storage, and data communication of received signals confirmed.

Conclusions:

  • The developed system meets the structural and performance requirements for time-domain electromagnetic detection in borehole environments.
  • The research shows significant potential for the advancement and application of time-domain electromagnetic detection technology in subterranean exploration.
  • The system facilitates enhanced long-range detection and data acquisition in challenging wellbore conditions.