On vertical resolution for seismic acquisition geometries in complex 3D media

Abstract

PreviousNext No AccessInternational Geophysical Conference, Qingdao, China, 17-20 April 2017On vertical resolution for seismic acquisition geometries in complex 3D mediaAuthors: Jun SuJun-Hua HuLi-Yun Fu*Wei WeiWeijia SunJun SuInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, and University of Chinese Academy of Sciences, BeijingSearch for more papers by this author, Jun-Hua HuInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, and University of Chinese Academy of Sciences, BeijingSearch for more papers by this author, Li-Yun Fu*Institute of Geology and Geophysics, Chinese Academy of Sciences, BeijingSearch for more papers by this author, Wei WeiInstitute of Geology and Geophysics, Chinese Academy of Sciences, BeijingSearch for more papers by this author, and Weijia SunInstitute of Geology and Geophysics, Chinese Academy of Sciences, BeijingSearch for more papers by this authorhttps://doi.org/10.1190/IGC2017-367 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Exploration frequency and spatial sampling have significant effects on both the horizontal and vertical resolutions of seismic imaging, but how to quantify their influence still remains controversial for complex media. The conventional criteria for vertical resolution are based on the theory of geometric seismology with the assumption of infinite bandwidth and simple media. The bandlimited and spatial-sampling effects on vertical resolution are important for seismic imaging in complex media. In this article, based on focal beam analysis, we define two parameters to quantify the vertical resolution of acquisition geometry: the main-lobe width (MLW) in a focal beam along the vertical direction and the ratio of its main-lobe amplitude to the total amplitude (RMT). MLW defines the vertical resolution to image the target, whereas RMT describes the clarity of the imaging. Comparisons of focal beams with increasing bandwidth and spatial sampling to classic criteria for the vertical resolution show that the MLW and RMT of focal beams can be more accurate to describe the vertical resolution of exploration seismology. Case studies of seismic migration with 3D seismic data from an oilfield in China, demonstrate how acquisition geometries with different MLW and RMT values influence performance of seismic imaging. Prior MLW and RMT analyses of acquisition geometry to predict the quality of acquired datasets can optimize the design of acquisition geometries before the implementation of seismic acquisition. Keywords: resolution, acquisition, 3D, sampling, imagingPermalink: https://doi.org/10.1190/IGC2017-367FiguresReferencesRelatedDetails International Geophysical Conference, Qingdao, China, 17-20 April 2017ISSN (online):2159-6832Copyright: 2017 Pages: 1525 publication data© 2017 Published in electronic format with permission by the Society of Exploration Geophysicists and Chinese Geophysical SocietyPublisher:Society of Exploration Geophysicists HistoryPublished Online: 31 May 2017 CITATION INFORMATION Jun Su, Jun-Hua Hu, Li-Yun Fu*, Wei Wei, and Weijia Sun, (2017), "On vertical resolution for seismic acquisition geometries in complex 3D media," SEG Global Meeting Abstracts : 1435-1438. https://doi.org/10.1190/IGC2017-367 Plain-Language Summary Keywordsresolutionacquisition3DsamplingimagingPDF DownloadLoading ...