Full waveform inversion based on scattering angle enrichment with application to real dataset

Handle URI:
http://hdl.handle.net/10754/593151
Title:
Full waveform inversion based on scattering angle enrichment with application to real dataset
Authors:
Wu, Zedong; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Reflected waveform inversion (RWI) provides a method to reduce the nonlinearity of the standard full waveform inversion (FWI). However, the drawback of the existing RWI methods is inability to utilize diving waves and the extra sensitivity to the migrated image. We propose a combined FWI and RWI optimization problem through dividing the velocity into the background and perturbed components. We optimize both the background and perturbed components, as independent parameters. The new objective function is quadratic with respect to the perturbed component, which will reduce the nonlinearity of the optimization problem. Solving this optimization provides a true amplitude image and utilizes the diving waves to update the velocity of the shallow parts. To insure a proper wavenumber continuation, we use an efficient scattering angle filter to direct the inversion at the early stages to direct energy corresponding to large (smooth velocity) scattering angles to the background velocity update and the small (high wavenumber) scattering angles to the perturbed velocity update. This efficient implementation of the filter is fast and requires less memory than the conventional approach based on extended images. Thus, the new FWI procedure updates the background velocity mainly along the wavepath for both diving and reflected waves in the initial stages. At the same time, it updates the perturbation with mainly reflections (filtering out the diving waves). To demonstrate the capability of this method, we apply it to a real 2D marine dataset.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Zhen-dong Zhang*, Yike Liu, and Gerard Schuster (2015) Wave Equation Inversion of Skeletonized SurfaceWaves. SEG Technical Program Expanded Abstracts 2015: pp. 2391-2395. doi: 10.1190/segam2015-5805253.1
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2015
Issue Date:
19-Aug-2015
DOI:
10.1190/segam2015-5922173.1
Type:
Article
Additional Links:
http://library.seg.org/doi/10.1190/segam2015-5922173.1
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWu, Zedongen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-01-10T10:53:30Zen
dc.date.available2016-01-10T10:53:30Zen
dc.date.issued2015-08-19en
dc.identifier.citationZhen-dong Zhang*, Yike Liu, and Gerard Schuster (2015) Wave Equation Inversion of Skeletonized SurfaceWaves. SEG Technical Program Expanded Abstracts 2015: pp. 2391-2395. doi: 10.1190/segam2015-5805253.1en
dc.identifier.doi10.1190/segam2015-5922173.1en
dc.identifier.urihttp://hdl.handle.net/10754/593151en
dc.description.abstractReflected waveform inversion (RWI) provides a method to reduce the nonlinearity of the standard full waveform inversion (FWI). However, the drawback of the existing RWI methods is inability to utilize diving waves and the extra sensitivity to the migrated image. We propose a combined FWI and RWI optimization problem through dividing the velocity into the background and perturbed components. We optimize both the background and perturbed components, as independent parameters. The new objective function is quadratic with respect to the perturbed component, which will reduce the nonlinearity of the optimization problem. Solving this optimization provides a true amplitude image and utilizes the diving waves to update the velocity of the shallow parts. To insure a proper wavenumber continuation, we use an efficient scattering angle filter to direct the inversion at the early stages to direct energy corresponding to large (smooth velocity) scattering angles to the background velocity update and the small (high wavenumber) scattering angles to the perturbed velocity update. This efficient implementation of the filter is fast and requires less memory than the conventional approach based on extended images. Thus, the new FWI procedure updates the background velocity mainly along the wavepath for both diving and reflected waves in the initial stages. At the same time, it updates the perturbation with mainly reflections (filtering out the diving waves). To demonstrate the capability of this method, we apply it to a real 2D marine dataset.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2015-5922173.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2015en
dc.subjectfilteringen
dc.subjectacousticen
dc.subjectwave equationen
dc.subjectscatteringen
dc.subjectfull-waveform inversionen
dc.titleFull waveform inversion based on scattering angle enrichment with application to real dataseten
dc.typeArticleen
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.authorWu, Zedongen
kaust.authorAlkhalifah, Tariq Alien
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