Designing an exploration scale OBN: Acquisition design for subsalt imaging and velocity determination

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2019Designing an exploration scale OBN: Acquisition design for subsalt imaging and velocity determinationAuthors: Joakim BlanchJon JarvisChris HurrenYan LiuLingli HuJoakim BlanchBHP, Jon JarvisBHP, Chris HurrenBHP, Yan LiuCGG, and Lingli HuCGGhttps://doi.org/10.1190/segam2019-3216451.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail AbstractDirect wave arrivals are the most robust signals to determine velocity and consequently they have been used for almost a century in hydrocarbon exploration. The reason is simple as the arrival time is explicitly available. In order to acquire these direct arrivals in a seismic experimental setting it is necessary that these waves turns back to the surface after having been sent into the Earth. As is well known it is possible to turn waves back up if they encounter faster propagation velocities than have been previously experienced. Using these simple concepts we show how it is possible to design a seismic acquisition to measure subsalt velocities when the salt cover is very thick and potentially not homogeneous. Until now (in marine seismic surveying) the physical limitations of the Earth have meant that use of direct wave arrivals have been restricted to relatively shallow depths of investigation, linked to streamer length. In this paper we describe how a new and novel application of node technology has been combined with a well established physical phenomena to support the acquisition of a world first exploration-scale Ocean Bottom Node (OBN) survey.Presentation Date: Wednesday, September 18, 2019Session Start Time: 1:50 PMPresentation Time: 4:45 PMLocation: 221APresentation Type: OralKeywords: ocean-bottom node, survey design, basement, full-waveform inversion, refractionPermalink: https://doi.org/10.1190/segam2019-3216451.1FiguresReferencesRelatedDetailsCited byDiscussion: Reply to the discussionDavid J. Monk1 June 2022 | The Leading Edge, Vol. 41, No. 6The Wolfspar experience with low-frequency seismic source field data: Motivation, processing, and implicationsAndrew Brenders, Joe Dellinger, Imtiaz Ahmed, Esteban Díaz, Mariana Gherasim, Hu Jin, Madhav Vyas, and John Naranjo4 January 2022 | The Leading Edge, Vol. 41, No. 1Exploring the full potential of a sparse nodes survey in the western Gulf of MexicoFeng Lin, Dorothy Ren, Jiawei Mei, Zhiguang Xue, Joakim Blanch, Marcus Cahoj, Jon Jarvis, and Alex Kostin1 September 2021GO_3D_OBS: the multi-parameter benchmark geomodel for seismic imaging method assessment and next-generation 3D survey design (version 1.0)31 March 2021 | Geoscientific Model Development, Vol. 14, No. 3Improving Mississippi Canyon images with ocean bottom node data: Challenges and surprisesYuan Yao, Hui Zhang, Lingli Hu, and Chao Peng30 September 2020Wide-azimuth towed-streamer and large-scale OBN acquisition: A combined solutionNicolae Moldoveanu, Nikolas Nesladek, and Denes Vigh30 September 2020From slope tomography to FWI: Is the conventional workflow viable in complex settings?S. Sambolian, S. Operto, A. Ribodetti, and L. Combe25 September 2020 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 Joakim Blanch, Jon Jarvis, Chris Hurren, Yan Liu, and Lingli Hu, (2019), "Designing an exploration scale OBN: Acquisition design for subsalt imaging and velocity determination," SEG Technical Program Expanded Abstracts : 192-196. https://doi.org/10.1190/segam2019-3216451.1 Plain-Language Summary Keywordsocean-bottom nodesurvey designbasementfull-waveform inversionrefractionPDF DownloadLoading ...