Efficient traveltime compression for 3D prestack Kirchhoff migration

Handle URI:
http://hdl.handle.net/10754/598120
Title:
Efficient traveltime compression for 3D prestack Kirchhoff migration
Authors:
Alkhalifah, Tariq
Abstract:
Kirchhoff 3D prestack migration, as part of its execution, usually requires repeated access to a large traveltime table data base. Access to this data base implies either a memory intensive or I/O bounded solution to the storage problem. Proper compression of the traveltime table allows efficient 3D prestack migration without relying on the usually slow access to the computer hard drive. Such compression also allows for faster access to desirable parts of the traveltime table. Compression is applied to the traveltime field for each source location on the surface on a regular grid using 3D Chebyshev polynomial or cosine transforms of the traveltime field represented in the spherical coordinates or the Celerity domain. We obtain practical compression levels up to and exceeding 20 to 1. In fact, because of the smaller size traveltime table, we obtain exceptional traveltime extraction speed during migration that exceeds conventional methods. Additional features of the compression include better interpolation of traveltime tables and more stable estimates of amplitudes from traveltime curvatures. Further compression is achieved using bit encoding, by representing compression parameters values with fewer bits. © 2010 European Association of Geoscientists & Engineers.
Citation:
Alkhalifah T (2010) Efficient traveltime compression for 3D prestack Kirchhoff migration. Geophysical Prospecting 59: 1–9. Available: http://dx.doi.org/10.1111/j.1365-2478.2010.00886.x.
Publisher:
Wiley-Blackwell
Journal:
Geophysical Prospecting
Issue Date:
13-Dec-2010
DOI:
10.1111/j.1365-2478.2010.00886.x
Type:
Article
ISSN:
0016-8025
Sponsors:
I thank KACST and KAUST for their financial and technical support. I also thank Bee Bednar for useful discussions as well as the anonymous reviewers, who have helped this paper immensely.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariqen
dc.date.accessioned2016-02-25T13:13:03Zen
dc.date.available2016-02-25T13:13:03Zen
dc.date.issued2010-12-13en
dc.identifier.citationAlkhalifah T (2010) Efficient traveltime compression for 3D prestack Kirchhoff migration. Geophysical Prospecting 59: 1–9. Available: http://dx.doi.org/10.1111/j.1365-2478.2010.00886.x.en
dc.identifier.issn0016-8025en
dc.identifier.doi10.1111/j.1365-2478.2010.00886.xen
dc.identifier.urihttp://hdl.handle.net/10754/598120en
dc.description.abstractKirchhoff 3D prestack migration, as part of its execution, usually requires repeated access to a large traveltime table data base. Access to this data base implies either a memory intensive or I/O bounded solution to the storage problem. Proper compression of the traveltime table allows efficient 3D prestack migration without relying on the usually slow access to the computer hard drive. Such compression also allows for faster access to desirable parts of the traveltime table. Compression is applied to the traveltime field for each source location on the surface on a regular grid using 3D Chebyshev polynomial or cosine transforms of the traveltime field represented in the spherical coordinates or the Celerity domain. We obtain practical compression levels up to and exceeding 20 to 1. In fact, because of the smaller size traveltime table, we obtain exceptional traveltime extraction speed during migration that exceeds conventional methods. Additional features of the compression include better interpolation of traveltime tables and more stable estimates of amplitudes from traveltime curvatures. Further compression is achieved using bit encoding, by representing compression parameters values with fewer bits. © 2010 European Association of Geoscientists & Engineers.en
dc.description.sponsorshipI thank KACST and KAUST for their financial and technical support. I also thank Bee Bednar for useful discussions as well as the anonymous reviewers, who have helped this paper immensely.en
dc.publisherWiley-Blackwellen
dc.subjectCompressionen
dc.subjectMigrationen
dc.subjectTraveltimeen
dc.titleEfficient traveltime compression for 3D prestack Kirchhoff migrationen
dc.typeArticleen
dc.identifier.journalGeophysical Prospectingen
dc.contributor.institutionKing Abdulaziz City for Science and Technology, Riyadh, Saudi Arabiaen
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