Estimation of TEM observation time due to conductor covered layer

DOI

10.2991/iceeg-16.2016.53How to use a DOI?

Keywords

low resistivity Layer, shielding effect, TEM

Abstract

The low-resistivity covered layer has shielding effects on transient electromagnetic (TEM) field above prospecting target. The probing depth of TEM depends on observation time. So, it is of great guiding significance to study the estimation method of observation time with low-resistivity covered layer. Firstly, the finite-difference time-domain method was used to analyze the change laws of underground electric field with observation time. From FDTD analysis, we know that the low-resistivity covered layer will not only affect the detection depth, but also weaken abnormal response of underground target. Secondly, based on the calculation of 2-layer geo-electric section, formula of departure time for anomaly was set up. Finally, the comprehensive apparent resistivity of layered medium was calculated and the estimated results of observation time with different electrical characteristic were given.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Dongyang Hou
AU  - Guoqiang Xue
AU  - Shu Yan
AU  - Nan-nan Zhou
PY  - 2016/06
DA  - 2016/06
TI  - Estimation of TEM observation time due to conductor covered layer
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 193
EP  - 195
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.53
DO  - 10.2991/iceeg-16.2016.53
ID  - Hou2016/06
ER  -