Migration velocity analysis using pre-stack wave fields

Handle URI:
http://hdl.handle.net/10754/625016
Title:
Migration velocity analysis using pre-stack wave fields
Authors:
Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Wu, Zedong
Abstract:
Using both image and data domains to perform velocity inversion can help us resolve the long and short wavelength components of the velocity model, usually in that order. This translates to integrating migration velocity analysis into full waveform inversion. The migration velocity analysis part of the inversion often requires computing extended images, which is expensive when using conventional methods. As a result, we use pre-stack wavefield (the double-square-root formulation) extrapolation, which includes the extended information (subsurface offsets) naturally, to make the process far more efficient and stable. The combination of the forward and adjoint pre-stack wavefields provides us with update options that can be easily conditioned to improve convergence. We specifically use a modified differential semblance operator to split the extended image into a residual part for classic differential semblance operator updates and the image (Born) modelling part, which provides reflections for higher resolution information. In our implementation, we invert for the velocity and the image simultaneously through a dual objective function. Applications to synthetic examples demonstrate the features of the approach.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Alkhalifah T, Wu Z (2016) Migration velocity analysis using pre-stack wave fields. Geophysical Prospecting 65: 639–649. Available: http://dx.doi.org/10.1111/1365-2478.12439.
Publisher:
Wiley-Blackwell
Journal:
Geophysical Prospecting
Issue Date:
25-Aug-2016
DOI:
10.1111/1365-2478.12439
Type:
Article
ISSN:
0016-8025
Sponsors:
We thank KAUST for its support. We also thank the associate editor Gilles Lambaré, Francesco Perrone, and two anonymous reviewers for their fruitful comments and suggestions.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1111/1365-2478.12439/full
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorWu, Zedongen
dc.date.accessioned2017-06-14T12:17:34Z-
dc.date.available2017-06-14T12:17:34Z-
dc.date.issued2016-08-25en
dc.identifier.citationAlkhalifah T, Wu Z (2016) Migration velocity analysis using pre-stack wave fields. Geophysical Prospecting 65: 639–649. Available: http://dx.doi.org/10.1111/1365-2478.12439.en
dc.identifier.issn0016-8025en
dc.identifier.doi10.1111/1365-2478.12439en
dc.identifier.urihttp://hdl.handle.net/10754/625016-
dc.description.abstractUsing both image and data domains to perform velocity inversion can help us resolve the long and short wavelength components of the velocity model, usually in that order. This translates to integrating migration velocity analysis into full waveform inversion. The migration velocity analysis part of the inversion often requires computing extended images, which is expensive when using conventional methods. As a result, we use pre-stack wavefield (the double-square-root formulation) extrapolation, which includes the extended information (subsurface offsets) naturally, to make the process far more efficient and stable. The combination of the forward and adjoint pre-stack wavefields provides us with update options that can be easily conditioned to improve convergence. We specifically use a modified differential semblance operator to split the extended image into a residual part for classic differential semblance operator updates and the image (Born) modelling part, which provides reflections for higher resolution information. In our implementation, we invert for the velocity and the image simultaneously through a dual objective function. Applications to synthetic examples demonstrate the features of the approach.en
dc.description.sponsorshipWe thank KAUST for its support. We also thank the associate editor Gilles Lambaré, Francesco Perrone, and two anonymous reviewers for their fruitful comments and suggestions.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1111/1365-2478.12439/fullen
dc.titleMigration velocity analysis using pre-stack wave fieldsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeophysical Prospectingen
kaust.authorAlkhalifah, Tariq Alien
kaust.authorWu, Zedongen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.