Results 1 to 10 of about 203 (112)

Study on the resolution capability of borehole transient electromagnetic method [PDF]

Scientific Reports
Water hazards present a significant challenge in the construction of coal mine tunnels. The borehole transient electromagnetic method (BTEM) is a detection technique that positions both the transmitter and receiver coils within a borehole, effectively ...
Tao Fan, Hao Wang, Zaibin Liu, Ping Li, Bin Yan, Zhao Zhao, Youxin An, Rui Zhao, Guihong Li, Qiang Liu   +9 more
doaj   +6 more sources

3-D forward modeling of shale gas fracturing dynamic monitoring using the borehole-to-ground transient electromagnetic method

Frontiers in Earth Science
The borehole-ground transient electromagnetic method enhances the detection range and resolution by placing the transmitter electrode within the borehole, allowing for close-proximity excitation of subsurface targets and compensating for the shortcomings
Weihao Zhang, Weihao Zhang, Xingbing Xie, Xingbing Xie, Lei Zhou, Lei Zhou, Xinyu Wang, Liangjun Yan   +7 more
doaj   +4 more sources

Double-transmitting and Sextuple-receiving Borehole Transient Electromagnetic Method and Experimental Study

Earth Sciences Research Journal, 2017
With the continuous improvement of precision requirements for borehole geophysical exploration, the application of transient electromagnetic method (from now on referred to as TEM) in a borehole has become a hot spot.
Bo Wang, Shengdong Liu, Shining Li, Fubao Zhou   +3 more
doaj   +4 more sources

New method for denoising borehole transient electromagnetic data with discrete wavelet transform [PDF]

Journal of Applied Geophysics, 2019
Abstract Discrete wavelet transform (DWT) has been widely used as a useful tool in denoising geophysical data for its outstanding feature of detecting singularities and transients. In this paper, we develop a new strategy of denoising borehole transient electromagnetic (BHTEM) data.
Xueping Dai, Li Zhen Cheng, Jean-Claude Mareschal, Daniel Lemire, Chong Liu   +4 more
openaire   +4 more sources

Multiple-Transmit Focusing for the Nondestructive Testing of Downhole Casings Based on Borehole Transient Electromagnetic Systems

IEEE Access, 2020
Borehole transient electromagnetic (TEM) array has proven to be efficient for the downhole nondestructive testing (NDT) of metal casings through the eddy-current property.
Changzan Liu, Bo Dang, Haiyan Wang, Xiaohong Shen, Ling Yang, Zhiping Ren, Ruirong Dang, Yuzhu Kang, Baoquan Sun   +8 more
doaj   +3 more sources

Research on borehole transient electromagnetic positioning method of azimuthal coil scanning detection

Meitan xuebao
The borehole transient electromagnetic method is used to detect the long-range water-bearing bodies around the borehole wall by using the advanced water exploration borehole in the heading roadway, which avoids the “one’s opinion in one hole” because the
Jiulong CHENG, Chenglin JIANG, Yao LI, Renxi BAI   +3 more
doaj   +2 more sources

Physical simulation on directional shielding of receiving coil in borehole transient electromagnetic method

Meitan xuebao
Borehole transient electromagnetic(BTEM)scanning detection method uses the advanced exploration boreholes in the roadway to scan and detect the hidden geological anomalies outside the borehole wall by rotating the transceiver coil inside the borehole ...
Chengtao XIN, Jiulong CHENG, Yao LI, Menghang KONG   +3 more
doaj   +2 more sources

Anomaly Field Extraction Based on Layered-Earth Model and Equivalent Eddy Current Inversion: A Case Study of Borehole zk506 in Baishiquan, Xinjiang [PDF]

Sensors
Based on the concept of an equivalent eddy current, anomaly field inversion provides an efficient and rapid inversion method for borehole transient electromagnetic (BHTEM) measurements. It enables the utilization of the equivalent eddy current to rapidly
Yi Yang, Jie Zhang, Qingquan Zhi, Yang Ou, Xingchun Wang, Lei Wang, Junjie Wu, Xiaohong Deng   +7 more
doaj   +2 more sources

A Combined Method of Seismic Monitoring and Transient Electromagnetic Detection for the Evaluation of Hydraulic Fracturing Effect in Coal Burst Prevention [PDF]

Sensors
In order to mitigate the risk of roof-dominated coal burst in underground coal mining, horizontal long borehole staged hydraulic fracturing technology has been prevailingly employed to facilitate the weakening treatment of the hard roof in advance.
Jiang Bian, Aixin Liu, Shuo Yang, Qiang Lu, Bo Jia, Fuhong Li, Xingen Ma, Siyuan Gong, Wu Cai   +8 more
doaj   +2 more sources

Gauss-Newton inversion of ground transient electromagnetic data using COMSOL multiphysics [PDF]

Scientific Reports
This study presents a Gauss-Newton inversion framework for Transient Electromagnetic (TEM) data based on the finite element software COMSOL Multiphysics.
Fan Li, Peng Wang, Kai Lu
doaj   +2 more sources