New seismic acquisition technology for efficient subsalt and pre-salt oil exploration

PreviousNext No Access15th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 31 July-3 August 2017NEW SEISMIC ACQUISITION TECHNOLOGY FOR EFFICIENT SUBSALT AND PRE-SALT OIL EXPLORATIONAuthors: Nick MoldoveanuChristopher CunnellFranck M. Le DiagonJohn C. MathewsonNick MoldoveanuWesternGecoSearch for more papers by this author, Christopher CunnellWesternGecoSearch for more papers by this author, Franck M. Le DiagonWesternGecoSearch for more papers by this author, and John C. MathewsonWesternGecoSearch for more papers by this authorhttps://doi.org/10.1190/sbgf2017-149 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Successful sub-salt exploration requires seismic data with good broadband characteristics, plus rich azimuths and offsets. Economic pressures also place a renewed emphasis on cost effective exploration. In this paper we describe a new multimeasurement towed-streamer acquisition technology which could be beneficial for subsalt and pre-salt reservoir exploration. Multimeasurement technology offers high-resolution imaging of shallow sediments. Combining with rich azimuth acquisition designs, such as WAZ, improves illumination of deeper targets. In complex geologic environments this generates significant energy propagating in the cross-cable direction. Field data from the multimeasurement technology deployed in a WAZ geometry demonstrate that the wavefield reconstruction process performs well under these conditions. Multimeasurement wavefield reconstruction also offers opportunities to acquire data more efficiently. Wide streamer and wide source configurations provide an efficiency uplift, and rely on the wavefield reconstruction to maintain the desired cross-cable sampling in the shot domain. A dual vessel configuration provides greater efficiency, generating twice the subsurface coverage with a single streamer vessel by adding a source vessel. Keywords: WAZ, sediment, acquisitionPermalink: https://doi.org/10.1190/sbgf2017-149FiguresReferencesRelatedDetails 15th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 31 July-3 August 2017ISSN (online):2159-6832Copyright: 2017 Pages: 1876 publication data© 2017 Published in electronic format with permission by the Brazilian Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 03 Aug 2017 CITATION INFORMATION Nick Moldoveanu, Christopher Cunnell, Franck M. Le Diagon, and John C. Mathewson, (2017), "NEW SEISMIC ACQUISITION TECHNOLOGY FOR EFFICIENT SUBSALT AND PRE-SALT OIL EXPLORATION," SEG Global Meeting Abstracts : 758-762. https://doi.org/10.1190/sbgf2017-149 Plain-Language Summary KeywordsWAZsedimentacquisitionPDF DownloadLoading ...