Realistic modeling of surface seismic and VSP using DAS with straight and shaped fibers of variable gauge length

PreviousNext No AccessFirst International Meeting for Applied Geoscience & Energy Expanded AbstractsRealistic modeling of surface seismic and VSP using DAS with straight and shaped fibers of variable gauge lengthAuthors: Anton EgorovMarwan ChararaEzzedeen AlfataiergeAndrey BakulinAnton EgorovAramco Innovations LLCSearch for more papers by this author, Marwan ChararaAramco Innovations LLCSearch for more papers by this author, Ezzedeen AlfataiergeSaudi AramcoSearch for more papers by this author, and Andrey BakulinSaudi AramcoSearch for more papers by this authorhttps://doi.org/10.1190/segam2021-3576626.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractThere is a rising demand for distributed acoustic sensing (DAS) in exploration and developmental geophysics. DAS has several advantages over conventional sensors, for example, fine spatial sampling, wide frequency range, relative ease of permanent downhole deployment. A few examples of using shaped cables were recently presented, which improve the broadside sensitivity of DAS systems. We present a pseudospectral algorithm that can model the seismic gathers acquired with straight and helical cables with DAS systems. The use of an accurate wavefield interpolation technique allows us to obtain synthetic wavefields with fine spatial sampling. The fit-for-purpose strain averaging methodology models the response of shaped fibers and the gauge length’s smoothing effect in a consistent manner. We model DAS seismic gathers for surface and borehole seismic acquisitions, examine their properties, and compare them to the more conventional particle velocity recordings.Keywords: DAS (distributed acoustic sensors), fiber-optic sensors, modeling, numerical, sensorsPermalink: https://doi.org/10.1190/segam2021-3576626.1FiguresReferencesRelatedDetails First International Meeting for Applied Geoscience & Energy Expanded AbstractsISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2021 Pages: 3561 publication data© 2021 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 01 Sep 2021 CITATION INFORMATION Anton Egorov, Marwan Charara, Ezzedeen Alfataierge, and Andrey Bakulin, (2021), "Realistic modeling of surface seismic and VSP using DAS with straight and shaped fibers of variable gauge length," SEG Technical Program Expanded Abstracts : 437-441. https://doi.org/10.1190/segam2021-3576626.1 Plain-Language Summary KeywordsDAS (distributed acoustic sensors)fiber-optic sensorsmodelingnumericalsensorsPDF DownloadLoading ...