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SEG Technical Program Expanded Abstracts 2010
In this paper we present an accurate and efficient method of 3D inversion of MT data. We address two common problems of 3D MT inversion: computational time and memory requirements. The method is based on an IE formulation of the EM forward modeling problem. We apply the quasi-Born approximation to compute the Fréchet derivative. This allows us to use only one rigorous forward modeling per inversion iteration. We have also developed a receiver footprint approach which dramatically reduces thedoi:10.1190/1.3513865 fatcat:fqgcoujkhrgvlfekd2fnqij2nq