Increasing resolution with a new method for efficient broadband marine acquisition and processing

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2009Increasing resolution with a new method for efficient broadband marine acquisition and processingAuthors: Ed KraghMorten SvendsenDeepak KapadiaGabriele BusanelloRichard GotoEverhard MuyzertTony CurtisEd KraghSchlumberger Cambridge Research.Search for more papers by this author, Morten SvendsenWesternGeco.Search for more papers by this author, Deepak KapadiaWesternGeco.Search for more papers by this author, Gabriele BusanelloWesternGeco.Search for more papers by this author, Richard GotoWesternGeco.Search for more papers by this author, Everhard MuyzertSchlumberger Cambridge ResearchSearch for more papers by this author, and Tony CurtisWesternGeco.Search for more papers by this authorhttps://doi.org/10.1190/1.3255095 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We present a new method for broadband marine acquisition and processing. A 3D shallow towed‐streamer spread is deployed, designed to optimize the mid‐ and high‐frequency parts of the bandwidth. In addition, data are simultaneously acquired from a small number of deeper towed streamers. The depth of these deeper streamers is optimized for the low frequencies such that the combined overall bandwidth is enhanced. Because the deep streamers are only going to provide the low‐frequency part of the bandwidth, we can more sparsely sample these data enabling efficient acquisition scenarios as fewer streamers are required. The data are combined in processing, optimizing the signal‐to‐noise ratio over the entire bandwidth. The resulting data exhibit both high resolution and deep penetration, for subsalt and sub‐basalt imaging, for example. In addition, inversion for acoustic impedance, imaging, and velocity model building, also benefit from the broadband result. Data acquired in this way are also more robust to poor weather conditions than conventionally acquired data. Data for a 3D case study using this new acquisition method were acquired off the NW Shelf of Australia. The streamer spread consisted of six shallow streamers towed at a depth of 6 m and two deeper streamers (below shallow streamers 2 and 5) towed at a depth of 20 m. A novel over/under source design was also used to bias source output toward low frequencies and further enhance the low‐frequency signal‐to‐noise ratio of the acquired data.Permalink: https://doi.org/10.1190/1.3255095FiguresReferencesRelatedDetailsCited by3D source deghosting after imagingPhilippe B. A. Caprioli*, Xiang Du, Robin P. Fletcher, and Ivan Vasconcelos5 August 2014 SEG Technical Program Expanded Abstracts 2009ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2009 Pages: 4338 publication data© 2009 Copyright © 2009 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 14 Oct 2009 CITATION INFORMATION Ed Kragh, Morten Svendsen, Deepak Kapadia, Gabriele Busanello, Richard Goto, Everhard Muyzert, and Tony Curtis, (2009), "Increasing resolution with a new method for efficient broadband marine acquisition and processing," SEG Technical Program Expanded Abstracts : 132-136. https://doi.org/10.1190/1.3255095 Plain-Language Summary PDF DownloadLoading ...