Optimal Full Waveform Inversion Strategy in Azimuthally Rotated Elastic Orthorhombic Media

Handle URI:
http://hdl.handle.net/10754/624911
Title:
Optimal Full Waveform Inversion Strategy in Azimuthally Rotated Elastic Orthorhombic Media
Authors:
Oh, Juwon; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
The elastic orthorhombic assumption is one of the most practical Earth models that takes into account the horizontal anisotropic layering and vertical fracture network. In this model, the rotation angle of the vertical planes of symmetry is a crucial parameter needed to increase the convergence of an anisotropic full waveform inversion (FWI) as well as to provide the fracture geometry along azimuthal direction. As an initial step, we investigate the possibility of recovering the azimuth angle via FWI, which may offer high-resolution information. We first utilize our new parameterization with deviation parameters, which provides the opportunity for multi-stage FWI. Based on the radiation patterns and gradient directions of each parameter, we show that the azimuth angle mainly affects the parameters that have azimuth-dependent radiation patterns, so that we can hierarchically build up the subsurface model from isotropic to VTI to azimuthally rotated orthorhombic models with less trade-offs. From the numerical example for a synthetic 3D model, we expect that both a deviation parameter and the azimuth angle can be recovered in the last stage of FWI with minimum trade-offs.
KAUST Department:
King Abdullah University of Science & Technology
Citation:
Oh JW, Alkhalifah T (2017) Optimal Full Waveform Inversion Strategy in Azimuthally Rotated Elastic Orthorhombic Media. 79th EAGE Conference and Exhibition 2017. Available: http://dx.doi.org/10.3997/2214-4609.201701232.
Publisher:
EAGE Publications BV
Journal:
79th EAGE Conference and Exhibition 2017
Issue Date:
26-May-2017
DOI:
10.3997/2214-4609.201701232
Type:
Conference Paper
Sponsors:
Research reported in this publication was supported by competitive research funding from King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia. For computer time, this research used the resources of the Supercomputing Laboratory in KAUST. We thank the members of Seismic Wave Analysis Group (SWAG) in KAUST for helpful discussions.
Additional Links:
http://www.earthdoc.org/publication/publicationdetails/?publication=88949
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorOh, Juwonen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2017-06-12T08:33:42Z-
dc.date.available2017-06-12T08:33:42Z-
dc.date.issued2017-05-26en
dc.identifier.citationOh JW, Alkhalifah T (2017) Optimal Full Waveform Inversion Strategy in Azimuthally Rotated Elastic Orthorhombic Media. 79th EAGE Conference and Exhibition 2017. Available: http://dx.doi.org/10.3997/2214-4609.201701232.en
dc.identifier.doi10.3997/2214-4609.201701232en
dc.identifier.urihttp://hdl.handle.net/10754/624911-
dc.description.abstractThe elastic orthorhombic assumption is one of the most practical Earth models that takes into account the horizontal anisotropic layering and vertical fracture network. In this model, the rotation angle of the vertical planes of symmetry is a crucial parameter needed to increase the convergence of an anisotropic full waveform inversion (FWI) as well as to provide the fracture geometry along azimuthal direction. As an initial step, we investigate the possibility of recovering the azimuth angle via FWI, which may offer high-resolution information. We first utilize our new parameterization with deviation parameters, which provides the opportunity for multi-stage FWI. Based on the radiation patterns and gradient directions of each parameter, we show that the azimuth angle mainly affects the parameters that have azimuth-dependent radiation patterns, so that we can hierarchically build up the subsurface model from isotropic to VTI to azimuthally rotated orthorhombic models with less trade-offs. From the numerical example for a synthetic 3D model, we expect that both a deviation parameter and the azimuth angle can be recovered in the last stage of FWI with minimum trade-offs.en
dc.description.sponsorshipResearch reported in this publication was supported by competitive research funding from King Abdullah University of Science and Technology (KAUST) in Thuwal, Saudi Arabia. For computer time, this research used the resources of the Supercomputing Laboratory in KAUST. We thank the members of Seismic Wave Analysis Group (SWAG) in KAUST for helpful discussions.en
dc.publisherEAGE Publications BVen
dc.relation.urlhttp://www.earthdoc.org/publication/publicationdetails/?publication=88949en
dc.rightsGold Open Accessen
dc.rightsArchived with thanks to 79th EAGE Conference and Exhibition 2017en
dc.titleOptimal Full Waveform Inversion Strategy in Azimuthally Rotated Elastic Orthorhombic Mediaen
dc.typeConference Paperen
dc.contributor.departmentKing Abdullah University of Science & Technologyen
dc.identifier.journal79th EAGE Conference and Exhibition 2017en
dc.eprint.versionPublisher's Version/PDFen
kaust.authorOh, Juwonen
kaust.authorAlkhalifah, Tariq Alien
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.