Plane-wave Least-squares Reverse Time Migration

Handle URI:
http://hdl.handle.net/10754/593744
Title:
Plane-wave Least-squares Reverse Time Migration
Authors:
Dai, Wei; Schuster, Gerard T. ( 0000-0001-7532-1587 )
Abstract:
Least-squares reverse time migration is formulated with a new parameterization, where the migration image of each shot is updated separately and a prestack image is produced with common image gathers. The advantage is that it can offer stable convergence for least-squares migration even when the migration velocity is not completely accurate. To significantly reduce computation cost, linear phase shift encoding is applied to hundreds of shot gathers to produce dozens of planes waves. A regularization term which penalizes the image difference between nearby angles are used to keep the prestack image consistent through all the angles. Numerical tests on a marine dataset is performed to illustrate the advantages of least-squares reverse time migration in the plane-wave domain. Through iterations of least-squares migration, the migration artifacts are reduced and the image resolution is improved. Empirical results suggest that the LSRTM in plane wave domain is an efficient method to improve the image quality and produce common image gathers.
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/segam2012-0382.1
Type:
Conference Paper
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2012-0382.1
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDai, Weien
dc.contributor.authorSchuster, Gerard T.en
dc.date.accessioned2016-01-18T14:13:16Zen
dc.date.available2016-01-18T14:13:16Zen
dc.date.issued2012-11-04en
dc.identifier.doi10.1190/segam2012-0382.1en
dc.identifier.urihttp://hdl.handle.net/10754/593744en
dc.description.abstractLeast-squares reverse time migration is formulated with a new parameterization, where the migration image of each shot is updated separately and a prestack image is produced with common image gathers. The advantage is that it can offer stable convergence for least-squares migration even when the migration velocity is not completely accurate. To significantly reduce computation cost, linear phase shift encoding is applied to hundreds of shot gathers to produce dozens of planes waves. A regularization term which penalizes the image difference between nearby angles are used to keep the prestack image consistent through all the angles. Numerical tests on a marine dataset is performed to illustrate the advantages of least-squares reverse time migration in the plane-wave domain. Through iterations of least-squares migration, the migration artifacts are reduced and the image resolution is improved. Empirical results suggest that the LSRTM in plane wave domain is an efficient method to improve the image quality and produce common image gathers.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2012-0382.1en
dc.subjectinversionen
dc.subjectlinearen
dc.subjectseismicen
dc.titlePlane-wave Least-squares Reverse Time Migrationen
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.authorDai, Weien
kaust.authorSchuster, Gerard T.en
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