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dc.contributor.authorDai, Wei
dc.contributor.authorSchuster, Gerard T.
dc.date.accessioned2015-08-03T11:10:46Z
dc.date.available2015-08-03T11:10:46Z
dc.date.issued2013-06-03
dc.identifier.issn00168033
dc.identifier.doi10.1190/GEO2012-0377.1
dc.identifier.urihttp://hdl.handle.net/10754/562802
dc.description.abstractA plane-wave least-squares reverse-time migration (LSRTM) is formulated with a new parameterization, where the migration image of each shot gather is updated separately and an ensemble of prestack images is produced along with common image gathers. The merits of plane-wave prestack LSRTM are the following: (1) plane-wave prestack LSRTM can sometimes offer stable convergence even when the migration velocity has bulk errors of up to 5%; (2) to significantly reduce computation cost, linear phase-shift encoding is applied to hundreds of shot gathers to produce dozens of plane waves. Unlike phase-shift encoding with random time shifts applied to each shot gather, plane-wave encoding can be effectively applied to data with a marine streamer geometry. (3) Plane-wave prestack LSRTM can provide higher-quality images than standard reverse-time migration. Numerical tests on the Marmousi2 model and a marine field data set are performed to illustrate the benefits of plane-wave LSRTM. Empirical results show that LSRTM in the plane-wave domain, compared to standard reversetime migration, produces images efficiently with fewer artifacts and better spatial resolution. Moreover, the prestack image ensemble accommodates more unknowns to makes it more robust than conventional least-squares migration in the presence of migration velocity errors. © 2013 Society of Exploration Geophysicists.
dc.description.sponsorshipWe thank the sponsors of CSIM consortium (http://csim.kaust.edu.sa) for their financial support. We are also grateful to the supercomputing lab at King Abdullah University of Science and Technology (KAUST) for their computer facilities and technical support. The comments from Tamas Nemeth, John Etgen, and three anonymous reviewers have greatly improved the quality of the paper.
dc.publisherSociety of Exploration Geophysicists
dc.titlePlane-wave least-squares reverse-time migration
dc.typeArticle
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.identifier.journalGeophysics
dc.contributor.institutionUniversity of Utah, Department of Geology and Geophysics, Salt Lake City, UT, United States
dc.contributor.institutionWesternGeco, Houston, TX, United States
kaust.personSchuster, Gerard T.


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