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• W2014967401 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Full‐waveform inversion in the time domain with an energy‐weighted gradientAuthors: Zhigang ZhangYouzuo LinLianjie HuangZhigang ZhangLos Alamos National Laboratory, Geophysics Group, MS D443, Los Alamos, NM 87545Search for more papers by this author, Youzuo LinLos Alamos National Laboratory, Geophysics Group, MS D443, Los Alamos, NM 87545Search for more papers by this author, and Lianjie HuangLos Alamos National Laboratory, Geophysics Group, MS D443, Los Alamos, NM 87545Search for more papers by this authorhttps://doi.org/10.1190/1.3627770 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract When applying full‐waveform inversion to surface seismic reflection data, one difficulty is that the deep region of the model is usually not reconstructed as well as the shallow region. We develop an energy‐weighted gradient method for the time‐domain full‐waveform inversion to accelerate the convergence rate and improve reconstruction of the entire model without increasing the computational cost. Three different methods can alleviate the problem of poor reconstruction in the deep region of the model: the layer stripping, depth‐weighting and pseudo‐Hessian schemes. The first two approaches need to subjectively choose stripping depths and weighting functions. The third one scales the gradient with only the forward propagation wavefields from sources. However, the Hessian depends on wavefields from both sources and receivers. Our new energy‐weighted method makes use of the energies of both forward and backward propagated wavefields from sources and receivers as weights to compute the gradient. We compare the reconstruction of our new method with those of the conjugate gradient and pseudo‐Hessian methods, and demonstrate that our new method significantly improves the reconstruction of both the shallow and deep regions of the model.Permalink: https://doi.org/10.1190/1.3627770FiguresReferencesRelatedDetailsCited ByTime-Domain Full Waveform Inversion Using the Gradient Preconditioning Based on Transmitted Wave Energy6 July 2019 | Journal of Ocean University of China, Vol. 18, No. 4Time-domain full waveform inversion using the gradient preconditioning based on transmitted waves energyXiao-bo Zhang, Jun Tan, Peng Song*, Jin-shan Li, Dong-ming Xia, and Zhao-lun Liu31 May 2017Full waveform inversion via weighted energy gradient method combined with demigrationKai Zhang, Zhenchun Li, Yongrui Chen, and Zhiye Li19 August 2015Least-squares reverse-time migration with modified total-variation regularizationYouzuo Lin* and Lianjie Lianjie19 August 2015A wave-energy-based precondition approach to full-waveform inversion in the time domainZhigang Zhang, Lianjie Huang, and Youzuo Lin25 October 2012 SEG Technical Program Expanded Abstracts 2011ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2011 Pages: 4424 Publisher:Society of Exploration Geophysicists HistoryPublished: 08 Aug 2011 CITATION INFORMATION Zhigang Zhang, Youzuo Lin, and Lianjie Huang, (2011), Full‐waveform inversion in the time domain with an energy‐weighted gradient, SEG Technical Program Expanded Abstracts : 2772-2776. https://doi.org/10.1190/1.3627770 Plain-Language Summary PDF DownloadLoading ..." @default.
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• W2014967401 title "Full‐waveform inversion in the time domain with an energy‐weighted gradient" @default.
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