Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geophysics》 2013-01
Add to Favorite Get Latest Update

Local angle-domain ray tracing and prestack depth migration in TI medium

DUAN Peng-Fei1,CHENG Jiu-Bing1*,CHEN San-Ping2,HE Guang-Ming2 1 School of Ocean and Earth Science,Tongji University,Shanghai 200092,China 2 CNPC CDEC Sichuan Geophysical Company,Chengdu 610213,China  
Neglecting anisotropy in seismic imaging may result in remarkable positional errors and focusing problem,especially for long-offset and wide-azimuth seismic data.To meet the demands of seismic imaging and anisotropic velocity analysis in laterally heterogeneous transversely isotropic(TI) media,we present an angle-domain imaging approach for prestack depth migration based on two advanced anisotropic ray tracing algorithms.It not only outputs migrated section and offset-domain common image gathers,but also obtains incident angles domain and illumination angles domain imaging results according to the local angular characteristics at a subsurface image point based on extended superposition of the impulse responses.In order to efficiently calculate traveltimes and local angular attributes in TI medium,we discuss and compare two improved ray tracing systems.One is based on phase velocity,which is evolved from the classic ray tracing equation of anisotropic media.Another system is derived from qP wave equation with acoustic approximation for VTI medium,and is extended to tackle TTI medium through coordinate rotation.Numerical examples on the standard theoretical anisotropic models show that our approach can be used as imaging tool for complex geological structures and efficient migration engine for anisotropic migration velocity analysis and model building.
【Fund】: 国家自然科学基金(41074083)资助
【CateGory Index】: P631.4
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【Citations】
Chinese Journal Full-text Database 1 Hits
1 KANG Wei,CHENG Jiu-Bing Key Laboratory of Marine Geology,School of Ocean and Earth Science,Tongji University,Shanghai 200092,China;Pseudo-acoustic wave equations for reverse-time migration in TI media[J];Chinese Journal of Geophysics;2012-03
【Co-citations】
Chinese Journal Full-text Database 1 Hits
1 Chen Keyang1,Wu Qinglin1,Fan Xingcai1,Chen Shumin1,Li Lailin1,Wang Jianmin1,Guan Xin1and Li Zhenkuan2(1.Research Institute of Exploration and Development,Daqing Oilfield,CNPC,Daqing,Heilongjiang 163712,China;2.Exploration Company,Daqing Oilfield,CNPC,Daqing,Heilongjiang 163453,China);High-order high-density 3D multi-wave multi-component elastic wave field separating forward numerical simulation[J];Reservoir Evaluation and Development;2013-02
【Secondary Citations】
Chinese Journal Full-text Database 5 Hits
1 ZHANG Mei-gen 1 WANG Miao-yue 1 LI Xiao-fan 1 YANG Xiao-chun 1 WANG Lei 2 (1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China; 2. Geology Academy, Shengli Petroleum Corporation Company, Dongying 257068, S;Finite Element Forward Modeling of Anisotropic Elastic Waves[J];Progress In Geophysics;2002-03
2 WANG Tong-kui1,LI Rui-hua2,LI Xiao-fan1,ZHANG Mei-gen1,LONG Gui-hua1(1.State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;2.China University of Mining and Technology,Beijing 100083);Numerical spectral-element modeling for seismic wave propagation in transversely isotropic medium[J];Progress in Geophysics;2007-03
3 WANG Tong-kui,Fu Xing-shen,Zhu De-xian,Liu Xuan,Gao Wen-zhong(China Petroleum Ji Dong Oilfield Exploration and Development Research Institute,Tangshan 063004,China);Spectral-element method for prestack reverse-time migration[J];Progress in Geophysics;2008-03
4 DONG LIANG-GUO;MA ZAI-TIAN;CAO JING-ZHONG;WANG HUA-ZHONG; GENG JIAN-HUA;LEI BING;XU SHI-YONG (Laboratory of Marine Geology of NDE, Tongji University, Shanghai 200092, China);A STAGGERED-GRID HIGH-ORDER DIFFERENCE METHOD OF ONE-ORDER ELASTIC WAVE EQUATION[J];Chinese Journal of Geophysics;2000-03
5 CHEN Mo (Research Institute of Haita, Research Institute of Exploration and Development, Daqing Oilfield Company Ltd, Daqing 163712, China);The seismic wave field reverse-time migration in transversely isotropic media[J];Lithologic Reservoirs;2009-04
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved