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- W4291753542 abstract "PreviousNext No AccessSecond International Meeting for Applied Geoscience & EnergyEnhancing low frequencies in airgun arrays, analysis of various field testsAuthors: Susanne RentschEdward HagerLauren WingSebastian HollandSusanne RentschShearwater GeoservicesSearch for more papers by this author, Edward HagerShearwater GeoservicesSearch for more papers by this author, Lauren WingShearwater GeoservicesSearch for more papers by this author, and Sebastian HollandShearwater GeoservicesSearch for more papers by this authorhttps://doi.org/10.1190/image2022-3745670.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractRecently, towed marine seismic acquisitions are intently focusing on enhancing low frequencies on the source and receiver side. In this abstract we document our journey to understand ways to enhance the low-frequency output of airgun arrays for towed marine seismic acquisitions. We investigate the physical effect of (partial) frequency locking of the pressure field from adjacent airguns or clusters, which can give a larger effective bubble volume, lower the oscillation frequency, and thus increase the low-frequency content emitted over a traditional design in which frequency locking does not occur. We used commercially available modelling software to understand the behaviour of cluster and gun bubble interactions with decreasing distance from one another. Driven by those modeling results we conducted a series of field experiments which can be used for calibration. We present details and results from our field experiments and show that we achieved (partial) frequency locking with a 70% increase in effective bubble volume for a 2-cluster scenario and a 95% increase for a 3-cluster scenario, respectively. Furthermore, spectra from inverted near field hydrophone recordings are verified with the help of PRM system measurements and show a significant lowfrequency uplift below 5 Hz for a partially frequency locked airgun array compared to a classical array.Keywords: low frequencies, airgun arrays, frequency lockingPermalink: https://doi.org/10.1190/image2022-3745670.1FiguresReferencesRelatedDetails Second International Meeting for Applied Geoscience & EnergyISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2022 Pages: 3694 publication data© 2022 Published in electronic format with permission by the Society of Exploration Geophysicists and the American Association of Petroleum GeologistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 15 Aug 2022 CITATION INFORMATION Susanne Rentsch, Edward Hager, Lauren Wing, and Sebastian Holland, (2022), Enhancing low frequencies in airgun arrays, analysis of various field tests, SEG Technical Program Expanded Abstracts : 26-30. https://doi.org/10.1190/image2022-3745670.1 Plain-Language Summary Keywordslow frequenciesairgun arraysfrequency lockingPDF DownloadLoading ..." @default.
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- W4291753542 title "Enhancing low frequencies in airgun arrays, analysis of various field tests" @default.
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