Applying Maxwell's EM Equations in the Low-Frequency Limit to Earth Investigations

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dc.contributor.advisorCastagna, John P.
dc.contributor.committeeMemberChesnokov, Evgeni M.
dc.contributor.committeeMemberJackson, David R.
dc.contributor.committeeMemberThomsen, Leon
dc.contributor.committeeMemberZheng, Yingcai
dc.creatorNeese, John Wesley
dc.creator.orcid0000-0002-2567-2300
dc.date.accessioned2022-06-30T00:12:32Z
dc.date.createdMay 2021
dc.date.issued2021-05
dc.date.submittedMay 2021
dc.date.updated2022-06-30T00:12:33Z
dc.description.abstractStandard seismic-processing methods have been applied to numerical simulations for several variations of a standard 1D numerical ISEM model. These calculations were justified by the mathematical similarity between dynamical equations in elastodynamics and electromagnetics, and demonstrated that, in simple cases, numerical ISEM data, appropriately acquired, and processed seismic-style, can be interpreted for subsurface effective resistivity. Previous 1D results are extended in the first section of this dissertation to numerical simulations for a 2.5D numerical ISEM model. Common shot gathers, common offset gathers, CMP gathers, and a proposed Q-compensated “resistivity moveout” correction show promise as indicators of resistivity variations in the subsurface. Naturally, the mathematical similarity is limited by essential differences between the physical quantities described in elastodynamics (underlying seismology) and electromagnetics. I explore these limits by defining an analogy between elastodynamic displacement and electromagnetic electric vector potential. Finally, I present a novel analytical solution for the problem of radiation emanating from an arbitrarily-oriented dipole and scattering from an infinite cylinder in 3D space. I then use the solution to perform a numerical study of crosshole electromagnetic tunnel detection.
dc.description.departmentEarth and Atmospheric Sciences, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.citationPortions of this document appear in: Neese, J. W., and L. Thomsen (2014), Seismic processing of numerical EM data, SEG Technical Program Expanded Abstracts, 33, 870-874; and in: Neese, J. W., and L. A. Thomsen (2015), Robustness of the EM-Radon Transform, 77th EAGE Conference Proceedings, 2015(1), 1-5; and in: Neese, John W., David R. Jackson, and Leon A. Thomsen. "Analogy Between Elastodynamic Displacement and Electromagnetic Vector Potentials." In 2019 URSI International Symposium on Electromagnetic Theory (EMTS), pp. 1-3. IEEE, 2019; and in: Neese, J. W., D. R. Jackson, Y. Zheng, and L. A. Thomsen (2018), TMz/TEz vector potentials due to an arbitrarily oriented dipole in 3-D space in the presence of an infinite dielectric cylinder, Radio Science, 53(4), 509-524; and in: Neese, J. W., D. R. Jackson, and Y. Zheng (2016), Electromagnetic tunnel detection using a magnetic dipole source in three-dimensional space, SEG Technical Program Expanded Abstracts, 35, 2464-2468; and in: Neese, J. W., D. R. Jackson, Y. Zheng, and L. A. Thomsen (in press 2021a), Numerical study of crosshole electromagnetic tunnel detection, Geophysics, 86(3), 1-14; and in: Neese, J. W., D. R. Jackson, Y. Zheng, and L. A. Thomsen. "Underground Tunnel Detection using EM Waves." In 2021 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), pp. 1-5. IEEE, 2021.
dc.identifier.urihttps://hdl.handle.net/10657/10216
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectelastodynamics-electromagnetics analogy
dc.subjectseismic processing of electromagnetic data
dc.subjectscattering from infinite dielectric cylinder
dc.subjectcrosshole electromagnetic tunnel detection
dc.titleApplying Maxwell's EM Equations in the Low-Frequency Limit to Earth Investigations
dc.type.dcmiText
dc.type.genreThesis
local.embargo.lift2023-05-01
local.embargo.terms2023-05-01
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentEarth and Atmospheric Sciences, Department of
thesis.degree.disciplineGeophysics
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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