Three‐dimensional inversion of EM coupling contaminated spectral induced polarization data
- 1 January 2010
- conference paper
- conference paper
- Published by Society of Exploration Geophysicists in SEG Technical Program Expanded Abstracts 2010
Abstract
The spectral induced polarization (SIP) response of rocks and soils is a complex function of biological, chemical, and mineral subsurface processes. Its measured geophysical attribute, the complex resistivity (CR), represents a macroscopic parameter to relate SIP data to structural, mineral and hydraulic information of porous media and fluids contained therein. The complexity of subsurface CR distributions necessitates accounting for the three‐ dimensionality of the Earth and the development of adequate data interpretation algorithms (cf. Oldenburg and Li, 1994; Weller et al., 2000; Yang et al., 2000). In this work we describe the development and testing of a three‐ dimensional SIP inversion algorithm for CR based on the non‐linear conjugate gradient method and finite‐difference (FD) forward modeling. A hierarchical parallel architecture of the algorithm and an optimal FD mesh design allow for an economic use of today's parallel computing capabilities to process large field data sets. Two different types of forward modeling operators provide a tradeoff between computational speed and maximal SIP data simulation accuracy, the latter achieved by properly accounting for electromagnetic coupling effects. We demonstrate the benefits of directly inverting data containing EM coupling effects on synthetic data that represent a mineral exploration survey.Keywords
This publication has 13 references indexed in Scilit:
- Imaging CSEM data in the presence of electrical anisotropyGeophysics, 2010
- New advances in three-dimensional controlled-source electromagnetic inversionGeophysical Journal International, 2008
- Three‐dimensional induction logging problems, Part 2: A finite‐difference solutionGeophysics, 2002
- Solution strategies for two- and three-dimensional electromagnetic inverse problemsInverse Problems, 2000
- Three-dimensional inversion of induced polarization data from simulated wasteJournal of Applied Geophysics, 2000
- Three‐dimensional wideband electromagnetic modeling on massively parallel computersRadio Science, 1996
- Inversion of induced polarization dataGeophysics, 1994
- Transient electromagnetic response of a three‐dimensional body in a layered earthGeophysics, 1986
- MINERAL DISCRIMINATION AND REMOVAL OF INDUCTIVE COUPLING WITH MULTIFREQUENCY IPGeophysics, 1978
- ELECTROMAGNETIC COUPLING IN FREQUENCY AND TIME‐DOMAIN INDUCED‐POLARIZATION SURVEYS OVER A MULTILAYERED EARTHGeophysics, 1973