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oa BEM, Broadband Electromagnetic Smart Method, phenomenology, theory, applications
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Mineral Exploration Symposium, Sep 2020, Volume 2020, p.1 - 5
Abstract
In this study a novel electromagnetic method, called BEM, is presented for investigating underground layers and anomalies. This method works in broad band frequency range of signals to transmit a pure magnetic field through the soil and receive an electromagnetic response using a wide range frequency domain receiver. Although, it is possible to use a time domain receiver which in that case, using a FFT transform the received signals can be monitored in frequency domain.
Introducing frequency shift phenomena, by solving Maxwell equations analytically and considering machine learning in order to interpret the inversion model outputs, high quality results are gained on both artificial model and real data. This method can produce three outputs (dielectric coefficient, conductivity and resistivity) which are helpful in exploration procedures and even identifying the type of material.
BEM technology has a very good result on both electrically conductive and nonconductive, magnetize and non-magnetize materials. In this paper after a brief review of shift phenomena and theoretical schemes, a comparison between BEM method and other approaches on synthetic data are described. Ultimately, two real case studies are presented for a better vision.
