Phase sequencing, marine vibrators, and high-multiplicity simultaneous sources

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017Phase sequencing, marine vibrators, and high-multiplicity simultaneous sourcesAuthors: David HallidayRobert LawsAli ÖzbekDavid HallidaySchlumbergerSearch for more papers by this author, Robert LawsSchlumbergerSearch for more papers by this author, and Ali ÖzbekSchlumbergerSearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17660035.1 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract We show how phase control, enabled by high-fidelity marine seismic vibrators, can be used to acquire and separate high-multiplicity simultaneous-source data. By changing the phase of the source wavefield from shot to shot and following a prescribed phase sequence, energy from selected sources can be moved into different parts of the frequency-wavenumber spectrum in the common-receiver domain. We use synthetic examples to demonstrate how this type of seismic acquisition, combined with wavefield reconstruction techniques, has the potential to provide a new method of high-multiplicity simultaneous-source acquisition and separation. Compared with the more conventional time-dithered air-gun approach the phase sequencing approach shows consistently lower simultaneous-source crosstalk. This suggests that the introduction of a marine vibrator with controllable phase could offer significant changes in marine seismic data quality and survey efficiency. Phase sequencing cannot be used with air guns because we have no control of the phase of the air-gun signal other than simple changes of amplitude and overall time delay. Presentation Date: Tuesday, September 26, 2017 Start Time: 9:45 AM Location: 371F Presentation Type: ORAL Keywords: simultaneous sources, marine, data reconstruction, deblending, phasePermalink: https://doi.org/10.1190/segam2017-17660035.1FiguresReferencesRelatedDetailsCited byAcquisition and separation of coherent simultaneous sources: Theory and an application to data acquired in the Sultanate of OmanZijian Tang and Xander Campman13 December 2018 | GEOPHYSICS, Vol. 84, No. 1Shot repetition: An alternative seismic blending code in marine acquisitionSixue Wu, Gerrit Blacquière, and Gert-Jan Adriaan van Groenestijn11 October 2018 | GEOPHYSICS, Vol. 83, No. 6 SEG Technical Program Expanded Abstracts 2017ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2017 Pages: 6093 publication data© 2017 Published in electronic format with permission by the Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished Online: 17 Aug 2017 CITATION INFORMATION David Halliday, Robert Laws, and Ali Özbek, (2017), "Phase sequencing, marine vibrators, and high-multiplicity simultaneous sources," SEG Technical Program Expanded Abstracts : 57-61. https://doi.org/10.1190/segam2017-17660035.1 Plain-Language Summary Keywordssimultaneous sourcesmarinedata reconstructiondeblendingphasePDF DownloadLoading ...