Alternative encoding strategies for encoded simultaneous sources full waveform inversion in the time domain

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2019Alternative encoding strategies for encoded simultaneous sources full waveform inversion in the time domainAuthors: Edwin Fagua DuarteCarlos A. N. da CostaJoao Medeiros de AraujoEdwin Fagua DuarteUniversidade Federal do Rio Grande do NorteSearch for more papers by this author, Carlos A. N. da CostaUniversidade Federal do Rio Grande do NorteSearch for more papers by this author, and Joao Medeiros de AraujoUniversidade Federal do Rio Grande do NorteSearch for more papers by this authorhttps://doi.org/10.1190/segam2019-3215402.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractEncoded Simultaneous Sources techniques have been used as an alternative to reduce the computational cost of Full Waveform Inversion, since the source encoding helps to reduce the number of wave propagations used in misfit function gradient calculation. In this work, we show two alternative encoding strategies to the conventional polarity encoding in time domain: In the first, we encode each shot applying a random static shift; In the second, we encode each shot applying a random phase rotation of the seismic wavefield. The velocity updates are carried out with the restarted L-BFGS algorithm. In order to test the proposed encoding strategies, we used the Marmousi model. To show the efficiency of the encoding strategies, we compared with the known polarity encoding strategy. The proposed strategies improved convergence, reduced crosstalk between the sources and, as a consequence, produced a velocity model with higher resolution.Presentation Date: Wednesday, September 18, 2019Session Start Time: 1:50 PMPresentation Time: 3:55 PMLocation: Poster Station 9Presentation Type: PosterKeywords: simultaneous source, time-domain, full-waveform inversionPermalink: https://doi.org/10.1190/segam2019-3215402.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2019ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2019 Pages: 5407 publication data© 2019 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 10 Aug 2019 CITATION INFORMATION Edwin Fagua Duarte, Carlos A. N. da Costa, and Joao Medeiros de Araujo, (2019), "Alternative encoding strategies for encoded simultaneous sources full waveform inversion in the time domain," SEG Technical Program Expanded Abstracts : 1670-1674. https://doi.org/10.1190/segam2019-3215402.1 Plain-Language Summary Keywordssimultaneous sourcetime-domainfull-waveform inversionPDF DownloadLoading ...