Gradient for the acoustic VTI full waveform inversion based on the instantaneous traveltime sensitivity kernels

Handle URI:
http://hdl.handle.net/10754/593182
Title:
Gradient for the acoustic VTI full waveform inversion based on the instantaneous traveltime sensitivity kernels
Authors:
Djebbi, Ramzi ( 0000-0002-6624-2905 ) ; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
The instantaneous traveltime is able to reduce the non-linearity of full waveform inversion (FWI) that originates from the wrapping of the phase. However, the adjoint state method in this case requires a total of 5 modeling calculations to compute the gradient. Also, considering the larger modeling cost for anisotropic wavefield extrapolation and the necessity to use a line-search algorithm to estimate a step length that depends on the parameters scale, we propose to calculate the gradient based on the instantaneous traveltime sensitivity kernels. We, specifically, use the sensitivity kernels computed using dynamic ray-tracing to build the gradient. The resulting update is computed using a matrix decomposition and accordingly the computational cost is reduced. We consider a simple example where an anomaly is embedded into a constant background medium and we compute the update for the VTI wave equation parameterized using vh, η and ε.
KAUST Department:
Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division
Citation:
Ramzi Djebbi* and Tariq Alkhalifah (2015) Gradient for the acoustic VTI full waveform inversion based on the instantaneous traveltime sensitivity kernels. SEG Technical Program Expanded Abstracts 2015: pp. 1430-1435. doi: 10.1190/segam2015-5903601.1
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2015
Issue Date:
19-Aug-2015
DOI:
10.1190/segam2015-5903601.1
Type:
Article
Additional Links:
http://library.seg.org/doi/10.1190/segam2015-5903601.1
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDjebbi, Ramzien
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-01-10T10:26:58Zen
dc.date.available2016-01-10T10:26:58Zen
dc.date.issued2015-08-19en
dc.identifier.citationRamzi Djebbi* and Tariq Alkhalifah (2015) Gradient for the acoustic VTI full waveform inversion based on the instantaneous traveltime sensitivity kernels. SEG Technical Program Expanded Abstracts 2015: pp. 1430-1435. doi: 10.1190/segam2015-5903601.1en
dc.identifier.doi10.1190/segam2015-5903601.1en
dc.identifier.urihttp://hdl.handle.net/10754/593182en
dc.description.abstractThe instantaneous traveltime is able to reduce the non-linearity of full waveform inversion (FWI) that originates from the wrapping of the phase. However, the adjoint state method in this case requires a total of 5 modeling calculations to compute the gradient. Also, considering the larger modeling cost for anisotropic wavefield extrapolation and the necessity to use a line-search algorithm to estimate a step length that depends on the parameters scale, we propose to calculate the gradient based on the instantaneous traveltime sensitivity kernels. We, specifically, use the sensitivity kernels computed using dynamic ray-tracing to build the gradient. The resulting update is computed using a matrix decomposition and accordingly the computational cost is reduced. We consider a simple example where an anomaly is embedded into a constant background medium and we compute the update for the VTI wave equation parameterized using vh, η and ε.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2015-5903601.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2015en
dc.subjectacousticen
dc.subjectinversionen
dc.subjectanisotropyen
dc.subjectmultiparameteren
dc.subjecttomographyen
dc.titleGradient for the acoustic VTI full waveform inversion based on the instantaneous traveltime sensitivity kernelsen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
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.authorDjebbi, Ramzien
kaust.authorAlkhalifah, Tariq Alien
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