Simulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media

Handle URI:
http://hdl.handle.net/10754/604975
Title:
Simulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media
Authors:
Cheng, Jiubing; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Wu, Zedong; Zou, Peng; Wang, Chenlong
Abstract:
In elastic imaging, the extrapolated vector fields are decoupled into pure wave modes, such that the imaging condition produces interpretable images. Conventionally, mode decoupling in anisotropic media is costly because the operators involved are dependent on the velocity, and thus they are not stationary. We have developed an efficient pseudospectral approach to directly extrapolate the decoupled elastic waves using low-rank approximate mixed-domain integral operators on the basis of the elastic displacement wave equation. We have applied k-space adjustment to the pseudospectral solution to allow for a relatively large extrapolation time step. The low-rank approximation was, thus, applied to the spectral operators that simultaneously extrapolate and decompose the elastic wavefields. Synthetic examples on transversely isotropic and orthorhombic models showed that our approach has the potential to efficiently and accurately simulate the propagations of the decoupled quasi-P and quasi-S modes as well as the total wavefields for elastic wave modeling, imaging, and inversion.
KAUST Department:
Earth Science and Engineering Program
Citation:
Simulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media 2016, 81 (2):T63 GEOPHYSICS
Publisher:
Society of Exploration Geophysicists
Journal:
GEOPHYSICS
Issue Date:
15-Mar-2016
DOI:
10.1190/geo2015-0184.1
Type:
Article
ISSN:
0016-8033; 1942-2156
Sponsors:
We would like to thank S. Fomel for sharing his experience in designing low-rank approximate algorithms for wave propagation. The first author appreciates T. F. Wang and J. Z. Sun for their useful discussion in this study. We acknowledge supports from the National Natural Science Foundation of China (no. 41474099) and Shanghai Natural Science Foundation (no. 14ZR1442900). This paper is also based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. 2230. We thank SEG, BP, and HESS Corporation for making the 2D VTI and TTI models available.
Additional Links:
http://library.seg.org/doi/10.1190/geo2015-0184.1
Appears in Collections:
Articles; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorCheng, Jiubingen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorWu, Zedongen
dc.contributor.authorZou, Pengen
dc.contributor.authorWang, Chenlongen
dc.date.accessioned2016-04-10T13:36:51Zen
dc.date.available2016-04-10T13:36:51Zen
dc.date.issued2016-03-15en
dc.identifier.citationSimulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media 2016, 81 (2):T63 GEOPHYSICSen
dc.identifier.issn0016-8033en
dc.identifier.issn1942-2156en
dc.identifier.doi10.1190/geo2015-0184.1en
dc.identifier.urihttp://hdl.handle.net/10754/604975en
dc.description.abstractIn elastic imaging, the extrapolated vector fields are decoupled into pure wave modes, such that the imaging condition produces interpretable images. Conventionally, mode decoupling in anisotropic media is costly because the operators involved are dependent on the velocity, and thus they are not stationary. We have developed an efficient pseudospectral approach to directly extrapolate the decoupled elastic waves using low-rank approximate mixed-domain integral operators on the basis of the elastic displacement wave equation. We have applied k-space adjustment to the pseudospectral solution to allow for a relatively large extrapolation time step. The low-rank approximation was, thus, applied to the spectral operators that simultaneously extrapolate and decompose the elastic wavefields. Synthetic examples on transversely isotropic and orthorhombic models showed that our approach has the potential to efficiently and accurately simulate the propagations of the decoupled quasi-P and quasi-S modes as well as the total wavefields for elastic wave modeling, imaging, and inversion.en
dc.description.sponsorshipWe would like to thank S. Fomel for sharing his experience in designing low-rank approximate algorithms for wave propagation. The first author appreciates T. F. Wang and J. Z. Sun for their useful discussion in this study. We acknowledge supports from the National Natural Science Foundation of China (no. 41474099) and Shanghai Natural Science Foundation (no. 14ZR1442900). This paper is also based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. 2230. We thank SEG, BP, and HESS Corporation for making the 2D VTI and TTI models available.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/geo2015-0184.1en
dc.rightsArchived with thanks to GEOPHYSICSen
dc.subjectanisotropyen
dc.subjectelasticen
dc.subjectdecompositionen
dc.subjectwave propagationen
dc.subjectpolarizationen
dc.titleSimulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic mediaen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalGEOPHYSICSen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionTongji University, State Key Laboratory of Marine Geology, Shanghai, Chinaen
dc.contributor.institutionTongji University, Shanghai, Chinaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAlkhalifah, Tariq Alien
kaust.authorWu, Zedongen
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