Joint inversion of multi-configuration electromagnetic induction data to characterize subsurface electrical conductivity

Khan Jadoon, Davood Moghadas, Anwar Jadoon, Thomas M. Missimer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electromagnetic induction (EMI) devices are capable of measuring the cumulative electrical conductivity over a certain depth range. In this study, a numerical experiment has been performed to test a novel join inversion approach for the Geonics EM34 instrument, by considering different coil offsets (10, 20 and 40 m), different coil orientations (vertical and horizontal), and different frequencies (6.4, 1.6 and 0.4 kHz). The subsurface is considered as four-layer model having different conductivities. The global multilevel coordinate search optimization algorithm is sequentially combination with the local optimization algorithm to minimize the misfit between the measured and modeled data. The layer conductivities are well predicted by the join inversion of electromagnetic data. The response surface of the objective function was investigated to assess the sensitivity of the subsurface layer conductivities. The sensitivity of the conductivity for the top two layers is less as compared to the deeper layers. The proposed approach is promising for the fast mapping of true conductivity distributions over large areas.
Original languageEnglish (US)
Title of host publicationNear Surface Geoscience 2012 – 18th European Meeting of Environmental and Engineering Geophysics
PublisherEAGE Publications
ISBN (Print)9789073834347
DOIs
StatePublished - Oct 21 2014
Externally publishedYes

Fingerprint Dive into the research topics of 'Joint inversion of multi-configuration electromagnetic induction data to characterize subsurface electrical conductivity'. Together they form a unique fingerprint.

Cite this