Multi-Parameter Estimation for Orthorhombic Media

Handle URI:
http://hdl.handle.net/10754/593140
Title:
Multi-Parameter Estimation for Orthorhombic Media
Authors:
Masmoudi, Nabil; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Building reliable anisotropy models is crucial in seismic modeling, imaging and full waveform inversion. However, estimating anisotropy parameters is often hampered by the trade off between inhomogeneity and anisotropy. For instance, one way to estimate the anisotropy parameters is to relate them analytically to traveltimes, which is challenging in inhomogeneous media. Using perturbation theory, we develop travel-time approximations for orthorhombic media as explicit functions of the anellipticity parameters η1, η2 and a parameter Δγ in inhomogeneous background media. Specifically, our expansion assumes inhomogeneous ellipsoidal anisotropic background model, which can be obtained from well information and stacking velocity analysis. This approach has two main advantages: in one hand, it provides a computationally efficient tool to solve the orthorhombic eikonal equation, on the other hand, it provides a mechanism to scan for the best fitting anisotropy parameters without the need for repetitive modeling of traveltimes, because the coefficients of the traveltime expansion are independent of the perturbed parameters. Furthermore, the coefficients of the traveltime expansion provide insights on the sensitivity of the traveltime with respect to the perturbed parameters. We show the accuracy of the traveltime approximations as well as an approach for multi-parameter scanning in orthorhombic media.
KAUST Department:
Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division
Citation:
Nabil Masmoudi* and Tariq Alkhalifah (2015) Multi-Parameter Estimation for Orthorhombic Media. SEG Technical Program Expanded Abstracts 2015: pp. 504-508. doi: 10.1190/segam2015-5836248.1
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2015
Issue Date:
19-Aug-2015
DOI:
10.1190/segam2015-5836248.1
Type:
Article
Additional Links:
http://library.seg.org/doi/10.1190/segam2015-5836248.1
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMasmoudi, Nabilen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-01-10T10:22:29Zen
dc.date.available2016-01-10T10:22:29Zen
dc.date.issued2015-08-19en
dc.identifier.citationNabil Masmoudi* and Tariq Alkhalifah (2015) Multi-Parameter Estimation for Orthorhombic Media. SEG Technical Program Expanded Abstracts 2015: pp. 504-508. doi: 10.1190/segam2015-5836248.1en
dc.identifier.doi10.1190/segam2015-5836248.1en
dc.identifier.urihttp://hdl.handle.net/10754/593140en
dc.description.abstractBuilding reliable anisotropy models is crucial in seismic modeling, imaging and full waveform inversion. However, estimating anisotropy parameters is often hampered by the trade off between inhomogeneity and anisotropy. For instance, one way to estimate the anisotropy parameters is to relate them analytically to traveltimes, which is challenging in inhomogeneous media. Using perturbation theory, we develop travel-time approximations for orthorhombic media as explicit functions of the anellipticity parameters η1, η2 and a parameter Δγ in inhomogeneous background media. Specifically, our expansion assumes inhomogeneous ellipsoidal anisotropic background model, which can be obtained from well information and stacking velocity analysis. This approach has two main advantages: in one hand, it provides a computationally efficient tool to solve the orthorhombic eikonal equation, on the other hand, it provides a mechanism to scan for the best fitting anisotropy parameters without the need for repetitive modeling of traveltimes, because the coefficients of the traveltime expansion are independent of the perturbed parameters. Furthermore, the coefficients of the traveltime expansion provide insights on the sensitivity of the traveltime with respect to the perturbed parameters. We show the accuracy of the traveltime approximations as well as an approach for multi-parameter scanning in orthorhombic media.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2015-5836248.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2015en
dc.subjectanisotropyen
dc.subjectacousticen
dc.subject3Den
dc.subjecttraveltimeen
dc.subjectmultiparameteren
dc.titleMulti-Parameter Estimation for Orthorhombic Mediaen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2015en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMasmoudi, Nabilen
kaust.authorAlkhalifah, Tariq Alien
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