Results 121 to 130 of about 291 (154)

Evolution law of surrounding rock stress field for ultra-deep shaft development blasting. [PDF]

Sci Rep
Sun B, Yang X, Chu H, Chen F, Wang J, Guo P, Cheng Z.   +6 more
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Surface-borehole transient electromagnetic response analysis of spherical conductor

2021 International Conference on Electronic Information Engineering and Computer Science (EIECS), 2021
Surface-borehole transient electromagnetic method is an effective deep geophysical exploration method, which is often used to survey metal deposits. The ore body nearby the borehole is the most important exploration target of surface-borehole transient electromagnetic method.
Guoyuan Han, Zhigang Wang, Yao Lu, Qingxin Meng   +3 more
exaly   +2 more sources

Novel Transient Electromagnetic Borehole System for Reservoir Monitoring

SPE Annual Technical Conference and Exhibition, 2011
Abstract In this paper we describe a novel transient electromagnetic borehole system for reservoir monitoring that has important advantages over existing borehole electromagnetic technology. This work is based on computer simulations of waterflooded reservoir models that demonstrate the effectiveness of this technology for reservoir ...
Sushant M. Dutta, Arcady Reiderman, Larry G. Schoonover, Michael B. Rabinovich   +3 more
exaly   +2 more sources

Research on Transient Electromagnetic Response of Magnetic Source in Borehole

Chinese Journal of Geophysics, 2011
AbstractThe transient electromagnetic exploration in borehole is a full space geophysical problem. The Gaver‐Stehfeest inverse Laplace transform is used to theoretically calculate the transient electromagnetic response in the receiver loop. And the effects of the parameters of the borehole mud, metal casing, the cement sheath and the formation on ...
exaly   +2 more sources

Analysis of Transient Electromagnetic Response for the Borehole to Airborne Survey Mode

Radio Science
Abstract This paper proposes a novel borehole to airborne survey mode for electromagnetic method by integrating the advantages of borehole excitation and airborne observation, which is applicable to the exploration of oil and gas reservoirs.
Guoqiang Xue, Liting Rao, Nannan Zhou
exaly   +2 more sources

Assessment of near-surface mapping capabilities by airborne transient electromagnetic data — An extensive comparison to conventional borehole data

Geophysics, 2014
ABSTRACT A newly developed helicopter transient electromagnetic (TEM) system has the ability to measure very early times within just a few μs after the turn off of the primary current. For such a system, careful calibration and accurate modeling of the electromagnetic (EM) response is critical to get true resistivities of the very ...
Cyril Schamper, Flemming Jørgensen, Esben Auken   +2 more
exaly   +2 more sources

Multiple-Eccentric-Sensor-Based Borehole Transient Electromagnetic System for Nondestructive Evaluation of Oil and Gas Well Casings

Springer Series in Geomechanics and Geoengineering, 2021
Borehole transient electromagnetic (TEM) techniques are widely used for nondestructive evaluation (NDE) of oil & gas well casings with eddy-current diffusion properties. In this paper, we present a multiple-eccentric-sensor-based borehole TEM system for NDE of downhole casings.
Bo Dang, Dang Bo
exaly   +2 more sources

Innovative Surface-Borehole Transient Electromagnetic Method for Sensing the Coal Seam Roof Grouting Effect

IEEE Transactions on Geoscience and Remote Sensing, 2022
Grzegorz Krolczyk, Zhixiong Li, J C Yu   +2 more
exaly   +2 more sources

Borehole transient electromagnetic stereo imaging method based on horizontal component anomaly feature clustering

Journal of Applied Geophysics, 2022
Zhe Fang, Xinxin Fang, Zhipeng Qi
exaly   +2 more sources

A Borehole Transient Electromagnetic Method Utilizing Apparent Magnetic Monopoles and Its Applications

IEEE Transactions on Geoscience and Remote Sensing
Bo Wang, Shengdong Liu
exaly   +2 more sources