Application of Gaussian beam migration in imaging of the steep complex structure in Tan‐Lu strike‐slip fault zone of Bohai Sea in China

Abstract

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2011Application of Gaussian beam migration in imaging of the steep complex structure in Tan‐Lu strike‐slip fault zone of Bohai Sea in ChinaAuthors: Zhijun ZhangLixin TianDonghong ZhouKui WuZhijun ZhangChina National Offshore Oilfield Corporation(CNOOC) Ltd Tianjin Branch, Tianjin, PR. ChinaSearch for more papers by this author, Lixin TianChina National Offshore Oilfield Corporation(CNOOC) Ltd Tianjin Branch, Tianjin, PR. ChinaSearch for more papers by this author, Donghong ZhouChina National Offshore Oilfield Corporation(CNOOC) Ltd Tianjin Branch, Tianjin, PR. ChinaSearch for more papers by this author, and Kui WuChina National Offshore Oilfield Corporation(CNOOC) Ltd Tianjin Branch, Tianjin, PR. ChinaSearch for more papers by this authorhttps://doi.org/10.1190/1.3627911 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Now precise imaging of steep dip with large angle is a Gordian knot in seismic migration, such as the imaging of steep complex structure in Tan‐Lu strike‐slip fault zone of Bohai Sea in China, without an ideal method to establish a more accurate velocity model, and therefore there is no effective and practical migration algorithm at present (He et al, 2005; Huang et al, 2006). Gaussian Beam migration is the improved method of standard ray migration, and both kinematic and dynamical characteristic are included in seismic wave field calculated by the Gaussian Beam. Gaussian Beam migration is not tortured by some singular problems, such as caustic region where ray method fails, and it avoids the multi‐path problem in standard ray method. Unlike the minimum travel‐time or maximum‐energy method, which only finds one travel time value, Gaussian Beam migration retains a majority of seismic arrivals by superposition of the beam, therefore it can guarantee the normal response in complex velocity structure, and overcome the dramatic and un‐fixed changes of amplitude in the vicinity of caustic zones where standard ray method does (Alkhalifah, 1995; Hill, 2001). In this paper, focusing on the problems in steep complex fault zone in northern middle area of Liaodong uplift in Liaodong Bay, such as steep dip, diverse stratum attitude, incorrect imaging of fault and unclear relations of fault combination, we processed the 3D seismic data in this area through the Gaussian Beam pre‐stack depth migration and obtained satisfactory results, and the results is very significant in guiding the next exploration of oil and gas in this area.Permalink: https://doi.org/10.1190/1.3627911FiguresReferencesRelatedDetailsCited ByHuber inversion-based reverse-time migration with de-primary imaging condition and curvelet-domain sparse constraintPetroleum Science, Vol. 84Reverse time migration from topographyJeffrey Shragge18 June 2014 | GEOPHYSICS, Vol. 79, No. 4 SEG Technical Program Expanded Abstracts 2011ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2011 Pages: 4424 Publisher:Society of Exploration Geophysicists HistoryPublished: 08 Aug 2011 CITATION INFORMATION Zhijun Zhang, Lixin Tian, Donghong Zhou, and Kui Wu, (2011), "Application of Gaussian beam migration in imaging of the steep complex structure in Tan‐Lu strike‐slip fault zone of Bohai Sea in China," SEG Technical Program Expanded Abstracts : 3435-3439. https://doi.org/10.1190/1.3627911 Plain-Language Summary PDF DownloadLoading ...