碳酸盐岩区单程波方程保幅叠前深度偏移
|
摘要
本文首先细致分析了保幅偏移方程各项的物理含义;然后介绍了理论反射系数的计算以及近似表达式;通过简单模型的计算,对比了成像结果与理论反射系数间的关系;最后将单程波保幅偏移技术应用于中国南方A探区碳酸盐岩地震资料的处理,实际处理结果表明本文方法对碳酸盐岩区地震资料的深层能量进行了有效补偿,中、深层信息更加丰富,可为AVO异常测定提供高质量的CIP道集。
In this paper,we first fully analyze the meaning of each item in preserved amplitude equation,and then introduce the approximate calculation equation of the theoretic reflection coefficient.We compare the migration amplitude of the simple model with its ideal value.Finally this preserved amplitude pre-stack depth migration by one-way wave equation is used in processing dataset acquired in a carbonate rock area,South China.The results show that the energy in deep layers is properly compensated and much more information in middle and deep layers provides high quality CIP gathers for AVO analysis.
In this paper,we first fully analyze the meaning of each item in preserved amplitude equation,and then introduce the approximate calculation equation of the theoretic reflection coefficient.We compare the migration amplitude of the simple model with its ideal value.Finally this preserved amplitude pre-stack depth migration by one-way wave equation is used in processing dataset acquired in a carbonate rock area,South China.The results show that the energy in deep layers is properly compensated and much more information in middle and deep layers provides high quality CIP gathers for AVO analysis.
引文
[1]Wu R S,Luo M Q,Chen S C and Xie X B.Acquisi-tion aperture correction in angle-domain and true-am-plitude imaging for wave equation migration.SEGTechnical Program Expanded Abstracts,2003,22:937～940
[2]Wu R S,Wang Y and Luo M Q.Beamlet migrationusing local cosine basis.Geophysics,2008,73(5):S207～S217
[3]Wu R S,Wang Y and Gao J H.Beamlet migration basedon local perturbation theory.SEG Technical ProgramExpanded Abstracts,2000,19:1008～1011
[4]Cao J and Wu R S.Fast acquisition aperture correc-tion by beamlet decomposition.Geophysics,2009,74(4):S67～S74
[5]Zhang Y,Zhang G Q and Bleistein N B.Theory oftrue-amplitude one-way wave equations and true-am-plitude common-shot migration.Geophysics,2005,70(4):E1～E10
[6]张宇.振幅保真的单程波方程偏移理论.地球物理学报,2006,49(5):1410～1430Zhang Yu.The theory of preserved-amplitude one-way wave equation migration.Chinese J Geophys(inChinese),2006,49(5):1410～1430
[7]Zhang H,McMechan G A and Stein J.True ampli-tude wave-equation migration.SEG Technical Pro-gram Expanded Abstracts,2003,22:913～916
[8]Xu S,Chauris H,Lambare G,Noble M.Common-angle migration:a strategy for imaging complexmedia.Geophysics,2001,66(6):1877～1894
[9]崔兴福,张关泉,吴雅丽.三维非均匀介质中真振幅地震偏移算子研究.地球物理学报,2004,47(3):509～513Cui Xing-fu,Zhang Guan-quan,Wu Ya-li.True am-plitude seismic migration operator in 3-D heterogene-ous medium.Chinese J Geophys(in Chinese),2004,47(3):509～513
[10]刘定进,印兴耀.傅立叶有限差分法保幅叠前深度偏移方法.地球物理学报,2007,50(1):268～276Liu Ding-jin,Yin Xing-yao.A method of Fourier fi-nite-difference preserved amplitude prestack depthmigration.Chinese J Geophysis(in Chinese),2007,50(1):268～276
[11]叶月明,李振春,仝兆岐,曹文俊.双复杂介质条件下频率—空间域有限差分法保幅偏移.地球物理学报,2008,51(5):1511～1519Ye Yue-ming,Li Zhen-chun,Tong Zhao-qi,CaoWen-jun.Preserved amplitude migration with dual-complexity.Chinese J Geophys(in Chinese),2008,51(5):1511～1519
[12]程玖兵,王华忠,马在田.带误差补偿的有限差分叠前深度偏移方法.石油地球物理勘探,2001,36(4):408～413Chen Jiu-bing,Wang Hua-zhong and Ma Zai-tian.Fi-nite-difference pre-stack depth migration with errorscompensation.OGP,2001,36(4):408～413
[13]张关泉.波动方程的上行波和下行波的耦合方程组.应用数学学报,1993,16(2):251～263Zhang Guan-quan.System of coupled equations fordowngoing and upcoming waves.J Appl Math(inChinese),1993,16(2):251～263
[14]Aki K and Richards P G.Quantitative Seismology:Theory and Methods.W H Freeman and Company,San Francisco,1980
[2]Wu R S,Wang Y and Luo M Q.Beamlet migrationusing local cosine basis.Geophysics,2008,73(5):S207～S217
[3]Wu R S,Wang Y and Gao J H.Beamlet migration basedon local perturbation theory.SEG Technical ProgramExpanded Abstracts,2000,19:1008～1011
[4]Cao J and Wu R S.Fast acquisition aperture correc-tion by beamlet decomposition.Geophysics,2009,74(4):S67～S74
[5]Zhang Y,Zhang G Q and Bleistein N B.Theory oftrue-amplitude one-way wave equations and true-am-plitude common-shot migration.Geophysics,2005,70(4):E1～E10
[6]张宇.振幅保真的单程波方程偏移理论.地球物理学报,2006,49(5):1410～1430Zhang Yu.The theory of preserved-amplitude one-way wave equation migration.Chinese J Geophys(inChinese),2006,49(5):1410～1430
[7]Zhang H,McMechan G A and Stein J.True ampli-tude wave-equation migration.SEG Technical Pro-gram Expanded Abstracts,2003,22:913～916
[8]Xu S,Chauris H,Lambare G,Noble M.Common-angle migration:a strategy for imaging complexmedia.Geophysics,2001,66(6):1877～1894
[9]崔兴福,张关泉,吴雅丽.三维非均匀介质中真振幅地震偏移算子研究.地球物理学报,2004,47(3):509～513Cui Xing-fu,Zhang Guan-quan,Wu Ya-li.True am-plitude seismic migration operator in 3-D heterogene-ous medium.Chinese J Geophys(in Chinese),2004,47(3):509～513
[10]刘定进,印兴耀.傅立叶有限差分法保幅叠前深度偏移方法.地球物理学报,2007,50(1):268～276Liu Ding-jin,Yin Xing-yao.A method of Fourier fi-nite-difference preserved amplitude prestack depthmigration.Chinese J Geophysis(in Chinese),2007,50(1):268～276
[11]叶月明,李振春,仝兆岐,曹文俊.双复杂介质条件下频率—空间域有限差分法保幅偏移.地球物理学报,2008,51(5):1511～1519Ye Yue-ming,Li Zhen-chun,Tong Zhao-qi,CaoWen-jun.Preserved amplitude migration with dual-complexity.Chinese J Geophys(in Chinese),2008,51(5):1511～1519
[12]程玖兵,王华忠,马在田.带误差补偿的有限差分叠前深度偏移方法.石油地球物理勘探,2001,36(4):408～413Chen Jiu-bing,Wang Hua-zhong and Ma Zai-tian.Fi-nite-difference pre-stack depth migration with errorscompensation.OGP,2001,36(4):408～413
[13]张关泉.波动方程的上行波和下行波的耦合方程组.应用数学学报,1993,16(2):251～263Zhang Guan-quan.System of coupled equations fordowngoing and upcoming waves.J Appl Math(inChinese),1993,16(2):251～263
[14]Aki K and Richards P G.Quantitative Seismology:Theory and Methods.W H Freeman and Company,San Francisco,1980
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心