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

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.