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• W2750368681 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017A hybrid-Galerkin finite-element method for seismic wave propagation in fractured mediaAuthors: Janaki VamarajuMrinal SenMary F. WheelerJonas De BasabeJanaki VamarajuUniversity of Texas–AustinSearch for more papers by this author, Mrinal SenUniversity of Texas–AustinSearch for more papers by this author, Mary F. WheelerUniversity of Texas–AustinSearch for more papers by this author, and Jonas De BasabeCICESESearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17683820.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract The discontinuous Galerkin Finite Element Method (DGM) is a promising approach for modeling wave propagation in fractured media. It allows for discontinuities in the displacement field to simulate fractures or faults in a model. The approach is based on the interior-penalty formulation of DGM, and the fractures are simulated using the linear-slip model, which is incorporated into the weak formulation. On the other hand, the Spectral Element Method (SEM) can be used to simulate elastic wave propagation in non-fractured media. SEM uses continuous basis functions which do not allow for discontinuities in the displacement field. Since the inception of DGM for seismic wave propagation in fractured media there has existed a question of whether DGM can be made computationally efficient. Here we propose a Hybrid Galerkin FEM (HGM) for elastic wave propagation in fractured media. HGM combines SEM and DGM to model seismic wave propagation in fractured media at reduced computational costs. We use DGM in areas containing fractures and SEM in regions where there are no fractures. The coupling between the domains at the interfaces is satisfied in the weak form through interface conditions. The degree of reduction in computation time greatly depends on the density of fractures in the medium. In this paper, we formulate and implement HGM for seismic wave propagation in fractured media. Using realistic numerical examples, we show that our proposed HGM outperforms a stand-alone DGM with reduced computation cost and memory requirement while maintaining the same level of accuracy. Presentation Date: Wednesday, September 27, 2017 Start Time: 2:40 PM Location: 381A Presentation Type: ORAL Keywords: elastic, modeling, wave propagation, finite element, fracturesPermalink: https://doi.org/10.1190/segam2017-17683820.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2017ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2017 Pages: 6093 publication data© 2017 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 17 Aug 2017 CITATION INFORMATION Janaki Vamaraju, Mrinal Sen, Mary F. Wheeler, and Jonas De Basabe, (2017), A hybrid-Galerkin finite-element method for seismic wave propagation in fractured media, SEG Technical Program Expanded Abstracts : 4074-4079. https://doi.org/10.1190/segam2017-17683820.1 Plain-Language Summary Keywordselasticmodelingwave propagationfinite elementfracturesPDF DownloadLoading ..." @default.
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• W2750368681 title "A hybrid-Galerkin finite-element method for seismic wave propagation in fractured media" @default.
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