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• W2317096780 abstract "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 tha..." @default.
• W2317096780 created "2016-06-24" @default.
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• W2317096780 date "2012-09-01" @default.
• W2317096780 modified "2023-09-27" @default.
• W2317096780 title "Plane-wave Least-squares Reverse Time Migration" @default.
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• W2317096780 doi "https://doi.org/10.1190/segam2012-0382.1" @default.
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