A Feasibility Study of CSEM in Geological Advance Forecast with Horizontal Casing Well

Jintai Li; Jianxin Liu; Jianqiang Xue; Rongwen Guo; Hang Chen; Rong Liu

doi:10.3390/min12050638

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A Feasibility Study of CSEM in Geological Advance Forecast with Horizontal Casing Well

Journal article

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A Feasibility Study of CSEM in Geological Advance Forecast with Horizontal Casing Well

Jintai Li, Jianxin Liu, Jianqiang Xue, Rongwen Guo, Hang Chen and Rong Liu

Minerals (Basel), Vol.12(5), p.638

05/01/2022

DOI: 10.3390/min12050638

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Abstract

With the rapid exploitation of deep mines by digging new tunnels, the advance forecast of water inrush has become increasingly important. The land-based controlled source electromagnetic method (CSEM) is commonly used to detect water-bearing structures. To increase its sensitivity, we propose a new measuring configuration for CSEM by placing EM sensors in an underground steel-cased well. The numerical modeling is conducted by COMSOL to overcome the difficulties of investigating the feasibility of the measuring configuration. The current distribution and electromagnetic field along an in-seam horizontal casing are investigated based on a synthesis three-layered model. The results illustrate that the casing can be treated as antennas that enhance the electric fields at large depths. The water-bearing structures can be observed by a magnetic field (with a perpendicularly horizontal electric dipole (HED) source) rather than an electric field (with a parallelly HED source). Numerical simulations demonstrate that the proposed method is a feasible and effective technique for the detection of water-bearing structures during deep mineral exploration.

Geochemistry & Geophysics

Mineralogy

Mining & Mineral Processing

Physical Sciences

Science & Technology

Details

Title: Subtitle: A Feasibility Study of CSEM in Geological Advance Forecast with Horizontal Casing Well
Creators: Jintai Li - Central South University
Jianxin Liu - Central South University
Jianqiang Xue - Cent South Univ, Sch Geosci & Infophys, Changsha 410083, Peoples R China
Rongwen Guo - Central South University
Hang Chen - Boise State University
Rong Liu - Central South University
Resource Type: Journal article
Publication Details: Minerals (Basel), Vol.12(5), p.638
DOI: 10.3390/min12050638
ISSN: 2075-163X
eISSN: 2075-163X
Publisher: Mdpi
Number of pages: 12
Grant note: 42130810; 42004065; 42074165 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC)
Language: English
Date published: 05/01/2022
Academic Unit: Earth and Environmental Sciences
Record Identifier: 9984962629702771

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