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2010-08-25

Data-Adaptive Resolution Method for the Parametric Three-Dimensional Inversion of Triaxial Borehole Electromagnetic Measurements

By Faruk Omer Alpak and Carlos Torres-Verdin
Progress In Electromagnetics Research B, Vol. 25, 93-111, 2010
doi:10.2528/PIERB10060503

Abstract

We develop a new adaptive inversion procedure: Data-adaptive Resolution Inversion (DRI) method, which eliminates the need of selecting a parameterization prior to inversion. Instead, one performs a hierarchical search for the correct parameterization while solving a sequence of inverse problems with an increasing dimension of parameterization. A parsimonious approach to inverse problems usually involves the application of the same refinement consistently over the complete spatial domain. Such an approach may lead to over-parameterization, subsequently, to unrealistic conductivity estimates and excessive computational work. With DRI, the new parameterization at an arbitrary stage of inversion sequence is allocated such that new degrees of freedom are not necessarily introduced all over the spatial domain of the problem. The aim is to allocate new degrees of freedom only where it is warranted by the available data. Inversion results confirm that DRI is robust and efficient for multiparameter inversion of multicomponent borehole electromagnetic measurements.

Citation


Faruk Omer Alpak and Carlos Torres-Verdin, "Data-Adaptive Resolution Method for the Parametric Three-Dimensional Inversion of Triaxial Borehole Electromagnetic Measurements," Progress In Electromagnetics Research B, Vol. 25, 93-111, 2010.
doi:10.2528/PIERB10060503
http://jpier.org/PIERB/pier.php?paper=10060503

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