Exploring imaging capabilities of the extended prestack wavefield

Handle URI:
http://hdl.handle.net/10754/593700
Title:
Exploring imaging capabilities of the extended prestack wavefield
Authors:
Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Wu, Zedong; Fomel, Sergey
Abstract:
The dynamic form of the double square-root (DSR) equation provides a mechanism to extrapolate prestack wavefields by moving the sources and receivers in space with respect to a potential image (scatterer) point. Its classical implementation for imaging often assumes sources and receivers are at the same horizontal surface. Reverse time migration (RTM), as well as common shot migrations in general, through its separate treatment of the sources and receivers, allows for more exibility in source and receiver configurations. A simple modication to the classical DSR equation provides such exibility. Specically, we define a 7-dimensional prestack wavefield for 3-D media that includes the vertical source and receiver offset. The corresponding dispersion relation can be used to extrapolate such wavefields. However, the cost for such a definition and extrapolation can be prohibitive, considering the high dimensionality of the problem. We reduce the dimensionality by recognizing that the sources and receivers often share the same horizontal plane, and thus, obtain the conventional DSR formulation. An efficient implementation of DSR in time yields extrapolation speeds that nominally exceed those obtained from reverse time migration. We can also reduce the dimensionality by setting the horizontal offset between the source and receiver at the image point to zero, or using a DSR-like formulation to correct for source-receiver vertical offset or topography.
KAUST Department:
Earth Science and Engineering Program
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2013
Conference/Event name:
SEG Technical Program Expanded Abstracts 2013
Issue Date:
19-Aug-2013
DOI:
10.1190/segam2013-0322.1
Type:
Conference Paper
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2013-0322.1
Appears in Collections:
Conference Papers; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorWu, Zedongen
dc.contributor.authorFomel, Sergeyen
dc.date.accessioned2016-01-18T08:31:30Zen
dc.date.available2016-01-18T08:31:30Zen
dc.date.issued2013-08-19en
dc.identifier.doi10.1190/segam2013-0322.1en
dc.identifier.urihttp://hdl.handle.net/10754/593700en
dc.description.abstractThe dynamic form of the double square-root (DSR) equation provides a mechanism to extrapolate prestack wavefields by moving the sources and receivers in space with respect to a potential image (scatterer) point. Its classical implementation for imaging often assumes sources and receivers are at the same horizontal surface. Reverse time migration (RTM), as well as common shot migrations in general, through its separate treatment of the sources and receivers, allows for more exibility in source and receiver configurations. A simple modication to the classical DSR equation provides such exibility. Specically, we define a 7-dimensional prestack wavefield for 3-D media that includes the vertical source and receiver offset. The corresponding dispersion relation can be used to extrapolate such wavefields. However, the cost for such a definition and extrapolation can be prohibitive, considering the high dimensionality of the problem. We reduce the dimensionality by recognizing that the sources and receivers often share the same horizontal plane, and thus, obtain the conventional DSR formulation. An efficient implementation of DSR in time yields extrapolation speeds that nominally exceed those obtained from reverse time migration. We can also reduce the dimensionality by setting the horizontal offset between the source and receiver at the image point to zero, or using a DSR-like formulation to correct for source-receiver vertical offset or topography.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2013-0322.1en
dc.subjectmodelingen
dc.subjectprestacken
dc.subjectmultiazimuthen
dc.subjectdepth migrationen
dc.titleExploring imaging capabilities of the extended prestack wavefielden
dc.typeConference Paperen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2013en
dc.conference.nameSEG Technical Program Expanded Abstracts 2013en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionUniversity of Texas at Austinen
kaust.authorAlkhalifah, Tariq Alien
kaust.authorWu, Zedongen
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