EVALUATION OF LIMITATIONS OF THE TRANSIENT ELECTROMAGNETIC METHOD IN SHALLOW-DEPTH STUDIES: NUMERICAL EXPERIMENT
A.E. Plotnikov
A.A. Trofimuk Institute of Petroleum Geology and Geophysics. Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Transient electromagnetic method, shallow depth, model experiment, interference
Abstract
Based on the proposed electrical model of a system for subsurface sensing by an induction transient electromagnetic method, a numerical experiment was performed to evaluate the limitations of the method in shallow-depth studies. During the experiment, the theoretical and pseudoexperimental emf curves are compared. Based on the degree of their convergence, the capability of the system to adequately record the response from the excited space at depth is determined. The experimental results are used to plot dependences of the measured parameters of the system on its geometrical dimensions. Recommendations on the use of small-size systems are given.
DOI: http://dx.doi.org/10.1016/j.rgg.2014.06.009
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