A nonlinear inversion for the velocity background and perturbation models

Handle URI:
http://hdl.handle.net/10754/593054
Title:
A nonlinear inversion for the velocity background and perturbation models
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) by inverting for the single scattered wavefield obtained using an image. However, current RWI methods usually neglect diving waves, which is an important source of information for extracting the long wavelength components of the velocity model. Thus, we propose a new optimization problem through breaking the velocity model into the background and the perturbation in the wave equation directly. In this case, the perturbed model is no longer the single scattering model, but includes all scattering. We optimize both components simultaneously, and thus, the objective function is nonlinear with respect to both the background and perturbation. The new introduced w can absorb the non-smooth update of background naturally. Application to the Marmousi model with frequencies that start at 5 Hz shows that this method can converge to the accurate velocity starting from a linearly increasing initial velocity. Application to the SEG2014 demonstrates the versatility of the approach.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Zedong Wu and Tariq Alkhalifah (2015) A nonlinear inversion for the velocity background and perturbation models. SEG Technical Program Expanded Abstracts 2015: pp. 1292-1296. doi: 10.1190/segam2015-5846177.1
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2015
Issue Date:
19-Aug-2015
DOI:
10.1190/segam2015-5846177.1
Type:
Article
Additional Links:
http://library.seg.org/doi/10.1190/segam2015-5846177.1
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.accessioned2016-01-07T08:12:03Zen
dc.date.available2016-01-07T08:12:03Zen
dc.date.issued2015-08-19en
dc.identifier.citationZedong Wu and Tariq Alkhalifah (2015) A nonlinear inversion for the velocity background and perturbation models. SEG Technical Program Expanded Abstracts 2015: pp. 1292-1296. doi: 10.1190/segam2015-5846177.1en
dc.identifier.doi10.1190/segam2015-5846177.1en
dc.identifier.urihttp://hdl.handle.net/10754/593054en
dc.description.abstractReflected waveform inversion (RWI) provides a method to reduce the nonlinearity of the standard full waveform inversion (FWI) by inverting for the single scattered wavefield obtained using an image. However, current RWI methods usually neglect diving waves, which is an important source of information for extracting the long wavelength components of the velocity model. Thus, we propose a new optimization problem through breaking the velocity model into the background and the perturbation in the wave equation directly. In this case, the perturbed model is no longer the single scattering model, but includes all scattering. We optimize both components simultaneously, and thus, the objective function is nonlinear with respect to both the background and perturbation. The new introduced w can absorb the non-smooth update of background naturally. Application to the Marmousi model with frequencies that start at 5 Hz shows that this method can converge to the accurate velocity starting from a linearly increasing initial velocity. Application to the SEG2014 demonstrates the versatility of the approach.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2015-5846177.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2015en
dc.subjectinversionen
dc.subjectfilteringen
dc.subjectdiving waveen
dc.subjectreflectionen
dc.subjectmultiplesen
dc.titleA nonlinear inversion for the velocity background and perturbation modelsen
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
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.