Resistivity inversion of transversely isotropic media
In this paper, we have suggested a finite difference algorithm for
resistivity forward and inverse modeling with electrically anisotropic
media in applied geophysics. Electrical anisotropy affects the surface
measurement in a fashion that may make interpretation erroneous. This
means that the resistivity section obtained by an inversion method that
does not incorporate electrical anisotropy gives the wrong subsurface
structure. We used a classical multielectrode dataset of a profile for
estimating not only horizontal but vertical resistivity as well. Thus,
the electrical anisotropy can be calculated. Finally, the finite
difference mesh can be corrected by using the estimated anisotropic
coefficient. The result of the developed algorithm was verified with a
2-layered analytic solution. Furthermore, the present method was also
tested on a field dataset.
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