基于高阶统计量的相干体算法在地震中深层构造解释中应用
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摘要
利用高阶统计量所具有的可抑制高斯噪声和比常规的自相关函数包含更多信息的优点,并结合地震解释的实际问题,本文采用四阶矩函数代替互相关函数进行相干计算,对第一代相干体算法进行了改进,发展了基于高阶统计量的相干体算法.该方法不仅计算速度快,而且抑制噪声能力强.通过与传统相干算法实际应用对比,该算法有效地突出了地层的高连续性特征,有利于层位追踪和断层解释,尤其利于中深层构造解释.
Based on the advantages of restraining Gaussian noise and information of common power spectral function, combined with higher order statistics and seismic interpretation ,the paper studied the higher-order statistics based on coherency algorithm, which replace correlation function with fourth order moment to calculate coherency and develop a new coherency algorithm. The new algorithm has very fast calculating speed and strong valid for restraining Gaussian noise. The result of practical coherent time profiles indicates that the new algorithm can effectively enhance the continuity, which is helpful to track strata and explain faults. It especially adapt to middle or deep structure interpretation.
Based on the advantages of restraining Gaussian noise and information of common power spectral function, combined with higher order statistics and seismic interpretation ,the paper studied the higher-order statistics based on coherency algorithm, which replace correlation function with fourth order moment to calculate coherency and develop a new coherency algorithm. The new algorithm has very fast calculating speed and strong valid for restraining Gaussian noise. The result of practical coherent time profiles indicates that the new algorithm can effectively enhance the continuity, which is helpful to track strata and explain faults. It especially adapt to middle or deep structure interpretation.
引文
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[2] Marfurt K J,KirlinL R,Farmer S L,et al.3D seismic attribute using a semblance-based coherency algorithm[J].Geophysics, 1998,63(4) :1150-1165．
[3] Marfurt K J,Sudhaker V,Gersztenkorn A,et al.Coherency calculations in the presence of structural dip[J].Geophysics,1999,6(1) :104-111．
[4] 尹成,熊晓军,等.基于高阶统计量的相干体算法及砂体沉积演化分析[J].石油学报,2005,26(4) :58-62． Yin C,Xiong X J,et al.Coherency algorithm based on higher-order statistics and sedimentary evolvement analysis of sandstone bodies[J].Acta petrolei sinica,2005,26(4) :58-62．
[5] Lu W K,Li Y D,Zhang S W.Higher-order-statistics and supertrace-based coherence-estimation algorithm [J].GEOPHYSICS,2005,VOL.70,NO.3,P.P13-P18．
[6] 柏冠军.三维地震资料微机管理及可视化解释系统研究与开发[M],西北大学硕士学位论文,2006． Bai G J.Research and development of 3D seismic data management and visual interpretation system based on PC [M].Northwest University master's degree paper,2006．
[7] Lu W K,Li Y D,Zhang S W,et al.Higher-order statistics based coherency estimation algorithm[A].In:SEG73th Annual International Meeting Extended Abstracts [C].Dallas: SEG,2003,328-331．
[8] 石颖,刘洪.地震信号的复地震道分析及应用[J].地球物理学进展,2008,23(5) :1538-1543． Shi Y,Liu H.Complex seismic trace analysis of seismic signal and its application[J].Progress in Geophysics,2008,23 (5) :1538-1543．
[9] 王从镔,龚洪林,许多年,等.高分辨率相干体分析技术及其应用[J].地球物理学进展,2008,23(5) :1575-1578． Wang C B,Gong H L,Xu D N,et al.High-resolution coherency analysis technique and its application[J].Progress in Geophysics,2008,23(5) : 1575-1578．
[10] 王怀洪,王秀东,田育鑫.利用相干体技术探测煤矿微小构造方法研究[J].地球物理学进展,2007,22(5) :1642-1649． Wang H H,Wang X D,Tian Y X.Study on the method to identify minor structure of coal mines with the coherence technology[J].Progress in Geophysics,2007,22 (5) :1642-1649．
[11] 吴媚,符力耘,李维新.高分辨率非线性储层物性参数反演方法和应用[J].地球物理学报,2008,51(2) :546-557． Wu M,Fu L Y,Li W X.A high-resolution nonlinear inversion method of reservoir parameters and its application to oil/gas exploration[J].Chinese Journal Geophysics,2008,51(2) : 546-557．
[12] 柏冠军,吴汉宁,赵希刚,等.地震资料预测薄层厚度方法研究与应用[J].地球物理学进展,2006,21(2) :554-558． Bai G J,Wu H N,Zhao X G,et al.Research on prediction of thin bed thickness using seismic data and its application[J].Progress in Geophysics (in Chinese),2006,21(2) :554-558．
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