A method for Q correction based on seismic structure constrained molecular decomposition

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2017A method for Q correction based on seismic structure constrained molecular decompositionAuthors: Lingling WangJinghuai GaoBing ZhangLingling WangXi'an Jiaotong UniversitySearch for more papers by this author, Jinghuai GaoXi'an Jiaotong UniversitySearch for more papers by this author, and Bing ZhangXi'an Jiaotong UniversitySearch for more papers by this authorhttps://doi.org/10.1190/segam2017-17787297.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract A new Q correction method based on seismic structure constrained molecular decomposition is proposed, to address the problems of lateral continuity and complex structure. Since the local peaks of the seismic trace's envelope relate to the general structure of the seismic data, we use them as the constraint to construct Molecular Gabor (MG) windows, and use these windows to transform the seismic trace into time-frequency (TF) domain, next extract the amplitude spectrum of the time-variant wavelets using the nonlinear contraction mapping method in the TF domain, then calculate the equivalent Q by the frequency shift method and correct the Q-effect in this TF domain. Both synthetic and real data examples demonstrate that the proposed method can effectively correct the Q-effect, enhance the vertical resolution of the seismic data and improve the recognition capability of the weak seismic signals from deep lays with good computational efficiency, meanwhile, it can achieve good lateral continuity and preserve the complex structure of the seismic data. Presentation Date: Thursday, September 28, 2017 Start Time: 11:00 AM Location: 370D Presentation Type: ORAL Keywords: deepwater, Q, high-resolution, decomposition, attenuationPermalink: https://doi.org/10.1190/segam2017-17787297.1FiguresReferencesRelatedDetails 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 Lingling Wang, Jinghuai Gao, and Bing Zhang, (2017), "A method for Q correction based on seismic structure constrained molecular decomposition," SEG Technical Program Expanded Abstracts : 712-717. https://doi.org/10.1190/segam2017-17787297.1 Plain-Language Summary KeywordsdeepwaterQhigh-resolutiondecompositionattenuationPDF DownloadLoading ...