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Bayesian inversion of geoelectrical resistivity data

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Summary.

Enormous quantities of geoelectrical data are produced daily and often used for large scale reservoir modelling. To interpret these data requires reliable and efficient inversion methods which adequately incorporate prior information and use realistically complex modelling structures. We use models based on random coloured polygonal graphs as a powerful and flexible modelling framework for the layered composition of the Earth and we contrast our approach with earlier methods based on smooth Gaussian fields. We demonstrate how the reconstruction algorithm may be efficiently implemented through the use of multigrid Metropolis–coupled Markov chain Monte Carlo methods and illustrate the method on a set of field data.
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Keywords: Bayesian inference; Coupling; Inverse problems; Markov chain Monte Carlo methods; Multigrid methods; Stochastic geometry

Document Type: Research Article

Affiliations: 1: Aalborg University, Denmark 2: University of Cambridge, UK

Publication date: 2003-08-01

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