FAST TWO-DIMENSIONAL SIMULATION OF HIGH-FREQUENCY ELECTROMAGNETIC FIELD IN INDUCTION LOGGING
M.I. Epov and V.N. Glinskikh
Institute of Geophysics, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
Keywords: Forward problem, approximation approaches, electromagnetic field, background medium model, HFIL soundings
Pages: 904-915
Abstract
New approximate algorithms applied to axisymmetrical induction logging are based on generalized Neumann representation of high-frequency electromagnetic field. Different approximations to forward problems in HFIL soundings use uniform or layered models of the background medium. The accuracy of the linear approximations depends on the background conditions, sizes of perturbations, and electrical conductivity contrasts. Accuracy can be improved by appropriate selection and correction for the background field whereas the perturbation component is represented as a linear anomaly. It is proposed to model the background medium with regard to attenuation of electromagnetic field in complex media.
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