Waveform inversion in acoustic orthorhombic media with a practical set of parameters

Handle URI:
http://hdl.handle.net/10754/626250
Title:
Waveform inversion in acoustic orthorhombic media with a practical set of parameters
Authors:
Masmoudi, Nabil; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Full-waveform inversion (FWI) in anisotropic media is overall challenging, mainly because of the large computational cost, especially in 3D, and the potential trade-offs between the model parameters needed to describe such a media. We propose an efficient 3D FWI implementation for orthorhombic anisotropy under the acoustic assumption. Our modeling is based on solving the pseudo-differential orthorhombic wave equation split into a differential operator and a scalar one. The modeling is computationally efficient and free of shear wave artifacts. Using the adjoint state method, we derive the gradients with respect to a practical set of parameters describing the acoustic orthorhombic model, made of one velocity and five dimensionless parameters. This parameterization allows us to use a multi-stage model inversion strategy based on the continuity of the scattering potential of the parameters as we go from higher symmetry anisotropy to lower ones. We apply the proposed approach on a modified SEG-EAGE overthrust synthetic model. The quality of the inverted model suggest that we may recover only 4 parameters, with different resolution scales depending on the scattering potential of these parameters.
KAUST Department:
King Abdullah University of Science and Technology (KAUST)
Citation:
Masmoudi N, Alkhalifah T (2017) Waveform inversion in acoustic orthorhombic media with a practical set of parameters. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17672715.1.
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2017
Issue Date:
17-Aug-2017
DOI:
10.1190/segam2017-17672715.1
Type:
Conference Paper
Sponsors:
We would like to thank KAUST for financial support and SWAG members for many useful discussions. For computer time, this research used the resources of the Supercomputing Laboratory in KAUST.
Additional Links:
https://library.seg.org/doi/10.1190/segam2017-17672715.1
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorMasmoudi, Nabilen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2017-11-29T11:13:57Z-
dc.date.available2017-11-29T11:13:57Z-
dc.date.issued2017-08-17en
dc.identifier.citationMasmoudi N, Alkhalifah T (2017) Waveform inversion in acoustic orthorhombic media with a practical set of parameters. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17672715.1.en
dc.identifier.doi10.1190/segam2017-17672715.1en
dc.identifier.urihttp://hdl.handle.net/10754/626250-
dc.description.abstractFull-waveform inversion (FWI) in anisotropic media is overall challenging, mainly because of the large computational cost, especially in 3D, and the potential trade-offs between the model parameters needed to describe such a media. We propose an efficient 3D FWI implementation for orthorhombic anisotropy under the acoustic assumption. Our modeling is based on solving the pseudo-differential orthorhombic wave equation split into a differential operator and a scalar one. The modeling is computationally efficient and free of shear wave artifacts. Using the adjoint state method, we derive the gradients with respect to a practical set of parameters describing the acoustic orthorhombic model, made of one velocity and five dimensionless parameters. This parameterization allows us to use a multi-stage model inversion strategy based on the continuity of the scattering potential of the parameters as we go from higher symmetry anisotropy to lower ones. We apply the proposed approach on a modified SEG-EAGE overthrust synthetic model. The quality of the inverted model suggest that we may recover only 4 parameters, with different resolution scales depending on the scattering potential of these parameters.en
dc.description.sponsorshipWe would like to thank KAUST for financial support and SWAG members for many useful discussions. For computer time, this research used the resources of the Supercomputing Laboratory in KAUST.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttps://library.seg.org/doi/10.1190/segam2017-17672715.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2017en
dc.subjectfull-waveform inversionen
dc.subject3Den
dc.subjectacousticen
dc.subjectanisotropyen
dc.titleWaveform inversion in acoustic orthorhombic media with a practical set of parametersen
dc.typeConference Paperen
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST)en
dc.identifier.journalSEG Technical Program Expanded Abstracts 2017en
dc.eprint.versionPublisher's Version/PDFen
kaust.authorMasmoudi, Nabilen
kaust.authorAlkhalifah, Tariq Alien
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