Multiscattering inversion for low-model wavenumbers

Handle URI:
http://hdl.handle.net/10754/622065
Title:
Multiscattering inversion for low-model wavenumbers
Authors:
Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Wu, Zedong
Abstract:
A successful full-waveform inversion implementation updates the low-wavenumber model components first for a proper description of the wavefield propagation and slowly adds the high wavenumber potentially scattering parts of the model. The low-wavenumber components can be extracted from the transmission parts of the recorded wavefield emanating directly from the source or the transmission parts from the single- or double-scattered wavefield computed from a predicted scatter field acting as secondary sources.We use a combined inversion of data modeled from the source and those corresponding to single and double scattering to update the velocity model and the component of the velocity (perturbation) responsible for the single and double scattering. The combined inversion helps us access most of the potential model wavenumber information that may be embedded in the data. A scattering-angle filter is used to divide the gradient of the combined inversion, so initially the high-wavenumber (low-scattering-angle) components of the gradient are directed to the perturbation model and the low-wavenumber (highscattering- angle) components are directed to the velocity model. As our background velocity matures, the scatteringangle divide is slowly lowered to allow for more of the higher wavenumbers to contribute the velocity model. Synthetic examples including the Marmousi model are used to demonstrate the additional illumination and improved velocity inversion obtained when including multiscattered energy. © 2016 Society of Exploration Geophysicists.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Alkhalifah T, Wu Z (2016) Multiscattering inversion for low-model wavenumbers. GEOPHYSICS 81: R417–R428. Available: http://dx.doi.org/10.1190/GEO2015-0650.1.
Publisher:
Society of Exploration Geophysicists
Journal:
GEOPHYSICS
Issue Date:
21-Sep-2016
DOI:
10.1190/GEO2015-0650.1
Type:
Article
ISSN:
0016-8033; 1942-2156
Sponsors:
We thank KAUST for its support. We also thank A. Guitton, J. Cheng, and three anonymous reviewers for their constructive comments and suggestions that ultimately helped to improve the paper.
Additional Links:
http://library.seg.org/doi/10.1190/geo2015-0650.1
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorWu, Zedongen
dc.date.accessioned2016-12-22T13:34:56Z-
dc.date.available2016-12-22T13:34:56Z-
dc.date.issued2016-09-21en
dc.identifier.citationAlkhalifah T, Wu Z (2016) Multiscattering inversion for low-model wavenumbers. GEOPHYSICS 81: R417–R428. Available: http://dx.doi.org/10.1190/GEO2015-0650.1.en
dc.identifier.issn0016-8033en
dc.identifier.issn1942-2156en
dc.identifier.doi10.1190/GEO2015-0650.1en
dc.identifier.urihttp://hdl.handle.net/10754/622065-
dc.description.abstractA successful full-waveform inversion implementation updates the low-wavenumber model components first for a proper description of the wavefield propagation and slowly adds the high wavenumber potentially scattering parts of the model. The low-wavenumber components can be extracted from the transmission parts of the recorded wavefield emanating directly from the source or the transmission parts from the single- or double-scattered wavefield computed from a predicted scatter field acting as secondary sources.We use a combined inversion of data modeled from the source and those corresponding to single and double scattering to update the velocity model and the component of the velocity (perturbation) responsible for the single and double scattering. The combined inversion helps us access most of the potential model wavenumber information that may be embedded in the data. A scattering-angle filter is used to divide the gradient of the combined inversion, so initially the high-wavenumber (low-scattering-angle) components of the gradient are directed to the perturbation model and the low-wavenumber (highscattering- angle) components are directed to the velocity model. As our background velocity matures, the scatteringangle divide is slowly lowered to allow for more of the higher wavenumbers to contribute the velocity model. Synthetic examples including the Marmousi model are used to demonstrate the additional illumination and improved velocity inversion obtained when including multiscattered energy. © 2016 Society of Exploration Geophysicists.en
dc.description.sponsorshipWe thank KAUST for its support. We also thank A. Guitton, J. Cheng, and three anonymous reviewers for their constructive comments and suggestions that ultimately helped to improve the paper.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/geo2015-0650.1en
dc.rightsArchived with thanks to GEOPHYSICSen
dc.titleMultiscattering inversion for low-model wavenumbersen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGEOPHYSICSen
dc.eprint.versionPublisher's Version/PDFen
kaust.authorAlkhalifah, Tariq Alien
kaust.authorWu, Zedongen
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