Results 21 to 30 of about 284 (138)

Groundwater resources detection based on transient electromagnetic system with small coils in Hongshaquan Mining Area

Meikuang Anquan, 2022
Groundwater environment is closely related to the protection and restoration of surface ecological environment, and the detection of groundwater resources is an important content to master the characteristics of groundwater environment.
LI Haichao, XU Biao, HU Xiongwu
doaj   +1 more source

EMD-Based Borehole TEM Array Signal Denoising and Baseline Wander Correction for NDT of Downhole Casings

IEEE Access, 2020
Transient electromagnetic (TEM) techniques have been proven to be efficient for nondestructive testing (NDT) operations due to their pulsed eddy-current properties.
Bo Dang, Changzan Liu, Ling Yang, Gang Wang, Mimi Wang, Zhiping Ren, Ruirong Dang   +6 more
doaj   +1 more source

Eccentric array-based borehole transient electromagnetic system for NDT of multipipe strings in sidetrack well

Journal of Physics: Conference Series, 2021
Abstract In the middle and late stage of oilfield development, the sidetracking technology is widely used for restoring the production of stripper well, damaged well and abandoned well. In this paper, we present an eccentric array-based borehole transient electromagnetic (TEM) system for nondestructive testing (NDT) of multipipe strings ...
Yang Ling, Dang Ruirong, Dang Bo, Guo Rui   +3 more
openaire   +1 more source

Research on the development height of water-conducting fracture zone in overburden rock based on transient electromagnetic method in hole

Meikuang Anquan
Transient electromagnetic method has shown great effectiveness in detecting water channels. However, conventional methods for detecting the development of water-conducting fracture zones are not suitable due to environmental influences.
Qinghua LIANG, Xiangjun DING, Guangliang LIU, Zhicheng LIU, Chunyuan WANG, Huan ZHANG   +5 more
doaj   +1 more source

Three-component detection technology of down-hole TEM for hidden geological anomalies in coal mines

Meitan kexue jishu
To meet the geological requirements for detailed exploration of concealed anomalies in coal mines and to accurately delineate and interpret hidden water hazards around boreholes, a three-component geological anomaly localization technique using borehole ...
Xiaowei GAO
doaj   +1 more source

Joint Inversion with Borehole and Semi-Airborne TEM Data Based on Equivalent Filament Approximation

, 2022
The borehole transient electromagnetic (TEM) method can be useful in deep mineral exploration to detect blind ore bodies beside or below the borehole, and is especially adapted to finding small-scale, deep, rich ore bodies.
Xiaohong Deng, Yi Yang, Qingquan Zhi, Xingchun Wang, Junjie Wu   +4 more
core   +1 more source

Application of Comprehensive Geophysical Prospecting Method in the Exploration of Coal Mined-Out Areas

Advances in Civil Engineering, 2019
Due to the influence of mining technology, some coal mines will leave mined-out areas (or goafs) in the rock mass after mining. If the distribution law and influence scope of mined-out areas cannot be accurately explored and controlled, it will bring ...
Xiao Luo, Shuang Gong, Zhonggang Huo, Hongyan Li, Xinpin Ding   +4 more
doaj   +1 more source

Status and prospect of coal mine geophysical exploration technology in China

Gong-kuang zidonghua, 2017
On the basis of coal mine geophysical exploration technology development represented by channel wave seismic method, mine transient electromagnetic method and underground borehole inclinometry, development directions of mine geophysical exploration ...
ZHANG Peng
doaj   +1 more source

Contributions to uncertainty related to hydrostratigraphic modeling using multiple-point statistics [PDF]

Hydrology and Earth System Sciences, 2018
Forecasting the flow of groundwater requires a hydrostratigraphic model, which describes the architecture of the subsurface. State-of-the-art multiple-point statistical (MPS) tools are readily available for creating models depicting subsurface geology.
A. A. S. Barfod, A. A. S. Barfod, T. N. Vilhelmsen, F. Jørgensen, A. V. Christiansen, A.-S. Høyer, J. Straubhaar, I. Møller   +7 more
doaj   +1 more source

Borehole transient electromagnetic array based relative attitude determination for relief well drilling

IOP Conference Series: Materials Science and Engineering, 2020
Abstract Drilling relief well is one of the most effective way to control blowout well at present. In order to improve the connection rate, the relief well needs to trace a short distance and then gradually approaches the accident well, where the relative space attitude determination of relief well and blowout well is the key to improve ...
Yang Ling, Dang Bo, Liu Changzan, Xu Linkang, Ren Zhiping, Dang Ruirong   +5 more
openaire   +1 more source