Kirchhoff积分法与快速步进算法(FMM)叠前深度偏移成像方法研究
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摘要
Kirchhoff积分法速度快、适应性好,是目前石油勘探界使用最为普遍的叠前深度偏移技术,该算法需要快速稳定的旅行时求取方法。快速步进算法(FastMatching Method)是建立在程函方程基础上的旅行时计算方法,它具有速度快、无条件稳定、可以适应复杂地质模型的特点。将快速步进算法(FMM)进行射线追踪所得到的旅行时,运用于对地震数据进行的Kirchhoff叠前深度偏移中。实验结果表明,Kirchhoff积分法与快速步进算法的结合是成功的,提高了偏移的速度,偏移结果良好。
Kirchhoff integral method is the most universal prestack depth migration technology in petroleum exploration because of fast calculating ability and good adaptability.The fast and stable travel-time calculational method is required by Kirchhoff integral method.Fast Matching Method is a travel-time calculational method based on eikonal equation,it has characteristics of fast calculating ability and unconditional stability,and the method can be used in complex geological model.The travel-time obtained by ray tracing of FMM is used in Kirchhoff prestack depth migration.The experimental results show that the combination of Kirchhoff integral method with FMM is successful,and improve the velocity of migration effectively,the migration results are satisfactory.
Kirchhoff integral method is the most universal prestack depth migration technology in petroleum exploration because of fast calculating ability and good adaptability.The fast and stable travel-time calculational method is required by Kirchhoff integral method.Fast Matching Method is a travel-time calculational method based on eikonal equation,it has characteristics of fast calculating ability and unconditional stability,and the method can be used in complex geological model.The travel-time obtained by ray tracing of FMM is used in Kirchhoff prestack depth migration.The experimental results show that the combination of Kirchhoff integral method with FMM is successful,and improve the velocity of migration effectively,the migration results are satisfactory.
引文
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[12]Samuel HG.地震偏移问题及其解决方案(Seismic mi-gration question and its solution)[J].勘探地球物理进展(Progress in Exploration Geophysics),2002,25(02):44-60.
[2]Jon F C.Image estimation by example:geophysical sound-ings image construction multidimensional autoregression[M].California:Stanford University Press,2006.
[3]陈伟,方伍宝(Chen Wei,Fang Wu-bao).偏移成像技术(Migration and imaging techniques)[J].勘探地球物理进展(Progress in Exploration Geophysics),2003,26(5-6):451-461.
[4]徐升(Xu Sheng),Gilles Lambar啨.复杂介质下保真振幅Kirchhoff偏移(True amplitude Kirchhoff prestack depth mi-gration in complex media)[J].地球物理学报(ChineseJournal of Geophysics),2006,49(5):1434-1444.
[5]Popovici A M.3-D imaging using higher order fast matc-hing traveltimes[J].Geophysics,2002,67(2):604-609.
[6]Sherif R E,Geldart L P.Exploration seismology[M].England:Cambridge University Press,1995.
[7]Jon F C,James L Black.Basic earth imaging[M].Cali-fornia:Stanford University Press,2005.
[8]王锡文,秦广胜,陈君,等(Wang Xin-wen,Qin Guang-sheng,Chen Jun,et al).叠前克希霍夫成像技术及其应用(Pre-stack Kirchhoff imaging technique and its applica-tion)[J].江汉石油学院学报(Journal of Jianghan Petrole-um Institute),2004,6(26):52-55.
[9]郭时光(Guo Shi-guang).Kirchhoff公式的一种推导(Derivation of Kirchhoff formula)[J].四川理工学院学报:自然科学版(Journal of SiChuan University ofScience&Enginering:Natural Science Edition),2005,18(2):99-102.
[10]单联瑜,刘连升(Shan Lian-yu,Liu Lian-sheng).三维高阶快速步进波前重构旅行时计算精度分析(Analysis oncomputation precision of wavefront-reconstructing travel-time for 3-D high-order rapid stepping algorithm)[J].石油地球物理勘探(Oil Geophysical Prospecting),2007,42(4):413-417.
[11]Z Yilmaz.Seismic data analysis:processing,inversionand interpretation of seismic data[M].Tulsa:Society ofExploration Geophysicists,2001.
[12]Samuel HG.地震偏移问题及其解决方案(Seismic mi-gration question and its solution)[J].勘探地球物理进展(Progress in Exploration Geophysics),2002,25(02):44-60.
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