Common-image gathers using the excitation amplitude imaging condition

Handle URI:
http://hdl.handle.net/10754/614410
Title:
Common-image gathers using the excitation amplitude imaging condition
Authors:
Kalita, Mahesh; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Common-image gathers (CIGs) are extensively used in migration velocity analysis. Any defocused events in the subsurface offset domain or equivalently nonflat events in angle-domain CIGs are accounted for revising the migration velocities. However, CIGs from wave-equation methods such as reverse time migration are often expensive to compute, especially in 3D. Using the excitation amplitude imaging condition that simplifies the forward-propagated source wavefield, we have managed to extract extended images for space and time lags in conjunction with prestack reverse time migration. The extended images tend to be cleaner, and the memory cost/disk storage is extensively reduced because we do not need to store the source wavefield. In addition, by avoiding the crosscorrelation calculation, we reduce the computational cost. These features are demonstrated on a linear v(z) model, a two-layer velocity model, and the Marmousi model.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Common-image gathers using the excitation amplitude imaging condition 2016, 81 (4):S261 GEOPHYSICS
Publisher:
Society of Exploration Geophysicists
Journal:
GEOPHYSICS
Issue Date:
6-Jun-2016
DOI:
10.1190/geo2015-0413.1
Type:
Article
ISSN:
0016-8033; 1942-2156
Sponsors:
We would like to thank the King Abdullah University of Science and Technology (KAUST) for its support and especially all the members of Seismic Wave Analysis Group within KAUST for the many fruitful discussions. This research made use of the resources of IT Research Computing at KAUST. Also, we thank all the reviewers, namely, B. D. Nguyen, H. Jin, and one anonymous reviewer for their critical and constructive suggestions.
Additional Links:
http://library.seg.org/doi/10.1190/geo2015-0413.1
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorKalita, Maheshen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-06-23T11:06:46Z-
dc.date.available2016-06-23T11:06:46Z-
dc.date.issued2016-06-06-
dc.identifier.citationCommon-image gathers using the excitation amplitude imaging condition 2016, 81 (4):S261 GEOPHYSICSen
dc.identifier.issn0016-8033-
dc.identifier.issn1942-2156-
dc.identifier.doi10.1190/geo2015-0413.1-
dc.identifier.urihttp://hdl.handle.net/10754/614410-
dc.description.abstractCommon-image gathers (CIGs) are extensively used in migration velocity analysis. Any defocused events in the subsurface offset domain or equivalently nonflat events in angle-domain CIGs are accounted for revising the migration velocities. However, CIGs from wave-equation methods such as reverse time migration are often expensive to compute, especially in 3D. Using the excitation amplitude imaging condition that simplifies the forward-propagated source wavefield, we have managed to extract extended images for space and time lags in conjunction with prestack reverse time migration. The extended images tend to be cleaner, and the memory cost/disk storage is extensively reduced because we do not need to store the source wavefield. In addition, by avoiding the crosscorrelation calculation, we reduce the computational cost. These features are demonstrated on a linear v(z) model, a two-layer velocity model, and the Marmousi model.en
dc.description.sponsorshipWe would like to thank the King Abdullah University of Science and Technology (KAUST) for its support and especially all the members of Seismic Wave Analysis Group within KAUST for the many fruitful discussions. This research made use of the resources of IT Research Computing at KAUST. Also, we thank all the reviewers, namely, B. D. Nguyen, H. Jin, and one anonymous reviewer for their critical and constructive suggestions.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/geo2015-0413.1en
dc.rightsArchived with thanks to GEOPHYSICSen
dc.subjectimagingen
dc.subjectcommon angleen
dc.subjectcommon offseten
dc.subjectreverse time migrationen
dc.titleCommon-image gathers using the excitation amplitude imaging conditionen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGEOPHYSICSen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorKalita, Maheshen
kaust.authorAlkhalifah, Tariq Alien
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