Abstract
Electromagnetic (EM) methods have been extensively used in geophysical investigations such as mineral and hydrocarbon exploration as well as in geological mapping and structural studies. In this paper, we developed an inversion methodology for Electromagnetic data to determine physical parameters of a set of horizontal layers. We conducted Forward model using transmission line method. In the inversion part, we solved multi parameter optimization problem where, the parameters are conductivity, dielectric constant, and permeability of each layer. The optimization problem was solved by simulated annealing approach. The inversion methodology was tested using a set of models representing common geological formations.
Highlights
Electromagnetic (EM) geophysical methods are used to gain information of the earth’s subsurface structure
The most electromagnetic properties that can be resolved by EM methods are Electrical Conductivity, Magnetic Permeability, and Dielectric Permittivity
We present an inversion methodology for EM data of an earth’s horizontal layered model with different conductivity, permeability, and permittivity
Summary
Electromagnetic (EM) geophysical methods are used to gain information of the earth’s subsurface structure. They are based on the phenomenon of interaction of time varying electromagnetic source fields with the physical properties of the earth. These methods are applicable where there is a sufficient contrast between the electromagnetic properties of the various subsurface units of interest. We present an inversion methodology for EM data of an earth’s horizontal layered model with different conductivity, permeability, and permittivity. We tested the inversion methodology against a set of horizontal layers that represent common geological structures, and the resultant estimated parameters have an allowed error margin, compared with the acceptable range of the model rocks, and sediments
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