An algorithm for the 3-D inversion of tomographic resistivity and induced polarisation data: Preliminary results

Abstract

An algorithm for the 3-D inversion of dc-resistivity and induced polarisation cross-borehole data is presented. The procedure is fully automated and is based on a 3-D finite element forward modelling algorithm. The inversion is achieved by a smoothness-constrained algorithm and uses sophisticated data error treatment. The features of the algorithm are presented in detail. Tests of the algorithm with synthetic data are presented as well. The preliminary results indicate that the algorithm is robust, noise insensitive and it produces good quality inversions. Further testing of the algorithm with real data is necessary in order to prove its full potential.