The scattering potential of partial derivative wavefields in 3-D elastic orthorhombic media: an inversion prospective

Handle URI:
http://hdl.handle.net/10754/619761
Title:
The scattering potential of partial derivative wavefields in 3-D elastic orthorhombic media: an inversion prospective
Authors:
Oh, Ju-Won; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Multiparameter full waveform inversion (FWI) applied to an elastic orthorhombic model description of the subsurface requires in theory a nine-parameter representation of each pixel of the model. Even with optimal acquisition on the Earth surface that includes large offsets, full azimuth, and multicomponent sensors, the potential for trade-off between the elastic orthorhombic parameters are large. The first step to understanding such trade-off is analysing the scattering potential of each parameter, and specifically, its scattering radiation patterns. We investigate such radiation patterns for diffraction and for scattering from a horizontal reflector considering a background isotropic model. The radiation patterns show considerable potential for trade-off between the parameters and the potentially limited resolution in their recovery. The radiation patterns of C11, C22, and C33 are well separated so that we expect to recover these parameters with limited trade-offs. However, the resolution of their recovery represented by recovered range of model wavenumbers varies between these parameters. We can only invert for the short wavelength components (reflection) of C33 while we can mainly invert for the long wavelength components (transmission) of the elastic coefficients C11 and C22 if we have large enough offsets. The elastic coefficients C13, C23, and C12 suffer from strong trade-offs with C55, C44, and C66, respectively. The trade-offs between C13 and C55, as well as C23 and C44, can be partially mitigated if we acquire P–SV and SV–SV waves. However, to reduce the trade-offs between C12 and C66, we require credible SH–SH waves. The analytical radiation patterns of the elastic constants are supported by numerical gradients of these parameters.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
The scattering potential of partial derivative wavefields in 3-D elastic orthorhombic media: an inversion prospective 2016, 206 (3):1740 Geophysical Journal International
Publisher:
Oxford University Press (OUP)
Journal:
Geophysical Journal International
Issue Date:
4-Jul-2016
DOI:
10.1093/gji/ggw238
Type:
Article
ISSN:
0956-540X; 1365-246X
Sponsors:
Research reported in this publication was supported by competitive research funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia. We would like to thank the reviewer Shohei Minato and an anonymous reviewer, as well as the editor Randy Keller for their fruitful and constructive comments to improve the paper. We also thank the members of Seismic Wave Analysis Group (SWAG) in KAUST for the helpful discussion.
Additional Links:
http://gji.oxfordjournals.org/lookup/doi/10.1093/gji/ggw238
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorOh, Ju-Wonen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-09-04T07:28:10Z-
dc.date.available2016-09-04T07:28:10Z-
dc.date.issued2016-07-04-
dc.identifier.citationThe scattering potential of partial derivative wavefields in 3-D elastic orthorhombic media: an inversion prospective 2016, 206 (3):1740 Geophysical Journal Internationalen
dc.identifier.issn0956-540X-
dc.identifier.issn1365-246X-
dc.identifier.doi10.1093/gji/ggw238-
dc.identifier.urihttp://hdl.handle.net/10754/619761-
dc.description.abstractMultiparameter full waveform inversion (FWI) applied to an elastic orthorhombic model description of the subsurface requires in theory a nine-parameter representation of each pixel of the model. Even with optimal acquisition on the Earth surface that includes large offsets, full azimuth, and multicomponent sensors, the potential for trade-off between the elastic orthorhombic parameters are large. The first step to understanding such trade-off is analysing the scattering potential of each parameter, and specifically, its scattering radiation patterns. We investigate such radiation patterns for diffraction and for scattering from a horizontal reflector considering a background isotropic model. The radiation patterns show considerable potential for trade-off between the parameters and the potentially limited resolution in their recovery. The radiation patterns of C11, C22, and C33 are well separated so that we expect to recover these parameters with limited trade-offs. However, the resolution of their recovery represented by recovered range of model wavenumbers varies between these parameters. We can only invert for the short wavelength components (reflection) of C33 while we can mainly invert for the long wavelength components (transmission) of the elastic coefficients C11 and C22 if we have large enough offsets. The elastic coefficients C13, C23, and C12 suffer from strong trade-offs with C55, C44, and C66, respectively. The trade-offs between C13 and C55, as well as C23 and C44, can be partially mitigated if we acquire P–SV and SV–SV waves. However, to reduce the trade-offs between C12 and C66, we require credible SH–SH waves. The analytical radiation patterns of the elastic constants are supported by numerical gradients of these parameters.en
dc.description.sponsorshipResearch reported in this publication was supported by competitive research funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia. We would like to thank the reviewer Shohei Minato and an anonymous reviewer, as well as the editor Randy Keller for their fruitful and constructive comments to improve the paper. We also thank the members of Seismic Wave Analysis Group (SWAG) in KAUST for the helpful discussion.en
dc.language.isoenen
dc.publisherOxford University Press (OUP)en
dc.relation.urlhttp://gji.oxfordjournals.org/lookup/doi/10.1093/gji/ggw238en
dc.rightsArchived with thanks to Geophysical Journal International.This article has been accepted for publication in Geophysical Journal International ©:The Authors 2016. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en
dc.subjectImage processingen
dc.subjectInverse theoryen
dc.subjectNumerical approximations and analysisen
dc.subjectControlled source seismologyen
dc.subjectSeismic anisotropyen
dc.subjectWave scattering and diffractionen
dc.titleThe scattering potential of partial derivative wavefields in 3-D elastic orthorhombic media: an inversion prospectiveen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeophysical Journal Internationalen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorOh, Ju-Wonen
kaust.authorAlkhalifah, Tariq Alien
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