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Towards a Fast Integral Equation Method for Inversion of Electromagnetic DataNormal access

Authors: M. Sommer and M. Jakobsen
Event name: Second EAGE/SPE Geosteering and Well Placement Workshop
Session: Vision for Well Placement and Geosteering – Where the Industry is Going?
Publication date: 05 November 2018
DOI: 10.3997/2214-4609.201803216
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 181.88Kb )
Price: € 20

To probe differences in electric conductivity around a measurement device, electromagnetic logging is a well established technique. The interpretation of electromagnetic data mostly relies on 1D inversions, because of high computational costs of 3D codes and the requirement of real time inversion results. However, the increase in computational power during the last decades, makes the step towards 2D or even 3D inversions feasible. Integral equation methods are proper for geosteering problems, because a discretization of only a small domain around the measurement device is required. Another advantage of integral equation methods is its greater suitability for inversion, because its formulation already contains the sensitivity. Our main goal of the presented work is to reduce the computational runtime of the inversion algorithm. Therefore, we investigate the applicability of different integral equation methods for geosteering problems and investigate ways to improve their performance.

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