西沙海域天然气水合物地震资料高密度双谱速度分析技术探讨
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
基于南海西沙海域天然气水合物二维高分辨率多道地震数据资料,使用Geovation地震资料处理系统的高密度双谱速度分析方法进行处理。在叠前时间偏移处理后的道集基础上,进行高密度双谱非双曲线型NMO自动拾取,最终获得解决各向异性问题后的叠前时间偏移剖面。分析结果表明,高密度双谱速度分析技术实现了速度逐道逐点的自动拾取,提高了时间方向的分辨能力、空间方向的分析密度,可以充分挖掘水合物地震数据的潜力。高密度双谱速度分析方法在提高处理质量的同时,可以帮助判定水合物的富集层位,研究似海底反射层附近的详细速度结构,为西沙海域水合物地震资料综合解释提供依据。
Based on 2-dimentional high-resolution multichannel seismic data, we discussed the application of highdensity bispectral velocity analysis with Geovation in Xisha area, South China Sea. After applying high-density bispectral velocity picking by nonhyperbolic moveout, the effect of anisotropy is resolved in the final PSTM profiles. The results show that high-density bispectral velocity analysis obtains velocity data with automatic picking on every point, which improves temporal resolution and spatial density, and taps into the potential of seismic data. High density bispectral velocity analyzing method improved processing quality, and benefited the detection of accumulation horizon of hydrate, and the exploration of detailed velocity structure near the bottom simulating reflections. This method will be helpful to the interpretation on the gas hydrates seismic data in Xisha area.
引文
马在田,宋海斌,孙建国,2000.海洋天然气水合物的地球物理探测高新技术.地球物理学进展,15(3):1—6
    庄祖垠,麻志国,王志亮等,2013.高密度各向异性速度分析技术及应用.工程地球物理学报,10(1):51—56
    宋海斌,江为为,张文生等,2002.天然气水合物的海洋地球物理研究进展.地球物理学进展,17(2):224—229
    宋海斌,张岭,江为为等,2003.海洋天然气水合物的地球物理研究(III):似海底反射.地球物理学进展,18(2):182—187
    张宝金,张光学,耿建华等,2008.南海含天然气水合物地层速度反演方法探讨.南海地质研究,(00):78—85
    徐翠娥,郝晓红,王影,2008.高密度双谱分析法在各向异性介质速度分析中的初步应用.海洋石油,28(1):1—5
    梁劲,王宏斌,郭依群,2006.南海北部陆坡天然气水合物的地震速度研究.现代地质,20(1):123—129
    潘成磊,张智勇,郭廷超,2010.高密度速度分析在YA高精度三维的应用.复杂油气藏,3(4):39—42
    Alkhalifah T,1997.Velocity analysis using nonhyperbolicmoveout in transversely isotropic media.Geophysics,62(6):1839—1854
    Alkhalifah T,2000.An acoustic wave equation for anisotropicmedia.Geophysics,65(4):1239—1250
    Alkhalifah T,Tsvankin I,1995.Velocity analysis for transverselyisotropic media.Geophysics,60(5):1550—1566
    Helbig K,Thomsen L,2005.75-plus years of anisotropy inexploration and reservoir seismics:a historical review ofconcepts and methods.Geophysics,70(6):9ND—23ND
    Le Meur D,Siliqi R,Gamar F et al,2003.High density moveoutparameter fields V andη.Part Two:Simultaneousgeostatistical filtering.Dallas,Texas:SEG TechnicalProgram Expanded Abstracts
    Siliqi R,2001.Technological leap in time processing focuses thedata throughout anisotropic media.First Break,19(11):612—618
    Siliqi R,Bousquie N,2000.Anelliptic time processing based on ashifted hyperbola approach.Calgary,Alberta:SEGExpanded Abstracts
    Siliqi R,Le Meur D,Gamar F et al,2003.High-density moveoutparameter fields V andη.Part one:Simultaneous automaticpicking.Dallas,Texas:SEG Technical Program ExpandedAbstracts
    Thomsen L,1986.Weak elastic anisotropy.Geophysics,51(10):1954—1966
    Tsvankin I,1996.P-wave signatures and notation for transverselyisotropic media:an overview.Geophysics,61(2):467—483
    Tsvankin I,Thomsen L,1994.Nonhyperbolic reflection moveoutin anisotropic media.Geophysics,59(8):1290—1304
    Tsvankin I,Thomsen L,1995.Inversion of reflection travel-timesfor transverse isotropy.Geophysics,60(4):1095—1107

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