Wavefield extrapolation in caustic-free normal ray coordinates

Handle URI:
http://hdl.handle.net/10754/593745
Title:
Wavefield extrapolation in caustic-free normal ray coordinates
Authors:
Ma, Xuxin; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Normal ray coordinates are conventionally constructed from ray tracing, which inherently requires smooth velocity profiles. To use rays as coordinates, the velocities have to be smoothed further to avoid caustics, which is detrimental to the mapping process. Solving the eikonal equation numerically for a line source at the surface provides a platform to map normal rays in complex unsmoothed velocity models and avoid caustics. We implement reverse-time migration (RTM) and downward continuation in the new ray coordinate system, which allows us to obtain efficient images and avoid some of the dip limitations of downward continuation.
KAUST Department:
Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2012
Conference/Event name:
SEG Technical Program Expanded Abstracts 2012
Issue Date:
4-Nov-2012
DOI:
10.1190/segam2012-0104.1
Type:
Conference Paper
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2012-0104.1
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMa, Xuxinen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2016-01-18T14:13:44Zen
dc.date.available2016-01-18T14:13:44Zen
dc.date.issued2012-11-04en
dc.identifier.doi10.1190/segam2012-0104.1en
dc.identifier.urihttp://hdl.handle.net/10754/593745en
dc.description.abstractNormal ray coordinates are conventionally constructed from ray tracing, which inherently requires smooth velocity profiles. To use rays as coordinates, the velocities have to be smoothed further to avoid caustics, which is detrimental to the mapping process. Solving the eikonal equation numerically for a line source at the surface provides a platform to map normal rays in complex unsmoothed velocity models and avoid caustics. We implement reverse-time migration (RTM) and downward continuation in the new ray coordinate system, which allows us to obtain efficient images and avoid some of the dip limitations of downward continuation.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2012-0104.1en
dc.subjectpoststacken
dc.subjectray tracingen
dc.subjectwave equationen
dc.subjectone-wayen
dc.subjectreverse-timeen
dc.titleWavefield extrapolation in caustic-free normal ray coordinatesen
dc.typeConference Paperen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2012en
dc.conference.dateNovember 4-9, 2012en
dc.conference.nameSEG Technical Program Expanded Abstracts 2012en
dc.conference.locationLas Vegas, Nevadaen
dc.eprint.versionPublisher's Version/PDFen
kaust.authorMa, Xuxinen
kaust.authorAlkhalifah, Tariq Alien
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