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dc.contributor.advisorRevil, André, 1970-
dc.contributor.authorZhou, Jieyi
dc.date.accessioned2007-01-03T06:26:20Z
dc.date.accessioned2022-02-03T12:51:29Z
dc.date.available2007-01-03T06:26:20Z
dc.date.available2022-02-03T12:51:29Z
dc.date.issued2015
dc.identifierT 7711
dc.identifier.urihttps://hdl.handle.net/11124/17066
dc.description2015 Spring.
dc.descriptionIncludes illustrations (some color).
dc.descriptionIncludes bibliographical references.
dc.description.abstractThe regularization term in the objective function of an inverse problem is equivalent to the "model covariance" in Tarantola's wording. It is not entirely reasonable to consider the model covariance to be isotropic and homogenous, as done in classical Tikhonov regularization, because the correlation relationships among model cells are likely to change with different directions and locations. The structure-constrained image-guided inversion method, presented in this thesis, aims to solve this problem, and can be used to integrate different types of geophysical data and geological information. The method is first theoretically developed and successfully tested with electrical resistivity data. Then it is applied to hydraulic tomography, and promising hydraulic conductivity models are obtained as well. With a correct guiding image, the image-guided inversion results not only follow the correct structure patterns, but also are closer to the true model in terms of parameter values, when compared with the conventional inversion results. To further account for the uncertainty in the guiding image, a Bayesian inversion scheme is added to the image-guided inversion algorithm. Each geophysical model parameter and geological (structure) model parameter is described by a probability density. Using the data misfit of image-guided inversion of the geophysical data as criterion, a stochastic (image-guided) inversion algorithm allows one to optimize both the geophysical model and the geological model at the same time. The last problem discussed in this thesis is, image-guided inversion and interpolation can help reduce non-uniqueness and improve resolution when utilizing spectral induced polarization data and petrophysical relationships to estimate permeability.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2010-2019 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectstochastic methods
dc.subjectregularization
dc.subjectelectrical methods
dc.subjectinversion
dc.subjectimage
dc.subject.lcshInversion (Geophysics)
dc.subject.lcshTomography
dc.subject.lcshElectric resistance
dc.subject.lcshInterpolation
dc.subject.lcshTensor fields
dc.subject.lcshPermeability
dc.titleStructure-constrained image-guided inversion of geophysical data
dc.typeText
dc.contributor.committeememberHale, Dave, 1955-
dc.contributor.committeememberSava, Paul C.
dc.contributor.committeememberTenorio, Luis
dc.contributor.committeememberMaxwell, Reed M.
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.degree.levelDoctoral
thesis.degree.disciplineGeophysics
thesis.degree.grantorColorado School of Mines


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