DOI: https://doi.org/10.24028/gzh.0203-3100.v38i2.2016.107768

On a possibility of usage of the scalar impedances for solving the inverse MTS problem for three-dimensional models

T. I. Prichepiy

Abstract


A review of the results of calculating of seeming specific resistance for a set of elementary models by scalar impedance method, in particular, by impedance parameter z has been given in the article. The values of electromagnetic field parameters of the models have been calculated by the Mackie 1994 program. According to this method of calculation the field is excited by flat low-frequency homogeneous electromagnetic wave. Calculation of electromagnetic field parameters for each model object was accomplished for a set of values of T periods. Specific resistances calculated by scalar impedance z, are presented as a graphs rz(x) and isolines fields across the observations area. The results obtained for the given class of models have shown a possibility to restore the conducting characteristics of lower half-space without determining the impedance tensor Ž and predetermined a possibility of further development of this method not only for visualization of data but also for obtaining numerical solutions of the inverse MTS problem.


Keywords


magnetotelluric sounding; visualization; 3D-modeling; scalar impedance; conducting structures

References


Berdichevskiy M. N., Dmitriev V. I., 2009. Models and methods of magnetotelluric. Moscow: Nauchnyy Mir, 680 p. (in Russian).

Prichepiy T. I., 2014. Visualization of MTS data by the method of scalar impedances for numerical models of elementary conducting structures. Geofizicheskiy zhurnal 36(3), 132—145 (in Russian).

Prichepiy T. I., 2012. The dependence of the scalar impedance of the azimuth of the complex magnetic field vector. Geofizicheskiy zhurnal 34(3), 129—136 (in Russian).

Prichepiy T. I., 2010. Scalar parameters of impedance type as a function of magnetic field polarization. Geofizicheskiy zhurnal 32(3), 93—105 (in Russian).

Shuman V. N., 2010. Magneto-telluric impedance: fundamental models and possibilities of their generalizations. Geofizicheskiy zhurnal 32(3), 18—28 (in Russian).

Shuman V. N., 2006. Methods and models of electromagnetic sounding systems: state, limitations and new abilities. Geofizicheskiy zhurnal 28(1), 17—30 (in Russian).

Aboul-Atta O. A., Boerner W. M., 1975. Vectorial Impedance Identity for the Natural Dependence of Harmonic Fields on Closed Boundaries. Canadian. Phys. 53(15), 1404—1407.

Mackie R. L., Smith J. T., Madden T. R., 1994. Three dimensional electromagnetic modeling using finite difference equations: the magnetotelluric example. Radio Sci. 29, 923—935.