基于高阶统计量的高分辨率时频分析方法
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摘要
时频分析是地球物理勘探领域信号分析和处理的关键技术,通过时频分析可以进行地震旋回的划分以及等时沉积界面的识别,然而传统的地震信号时频分析方法存在分辨率低、分析结果不直观等缺点。在分析现有时频方法特点的基础上,提出了基于高阶统计量的高分辨率时频分析方法,该方法能够有效反映时变信号的频谱特性,具有分辨率高、分析结果客观准确等特点。系统阐述了基于高阶统计量的时频分析方法的基本原理,并采用正演模型分析验证了该方法的有效性,将其应用于东营凹陷北带砂砾岩体旋回与沉积期次的划分,取得了良好的效果。
Time-frequency analysis is a key technology of signal analyzing and processing in geophysical exploration. It can be used in seismic cycles dividing and isochronous depositional interface identifying. However,the traditional time-frequency analysis methods have many shortcomings of low resolution and indirect result. High-order statistics time-frequency analysis method was proposed based on analyzing the present methods. The new method can reflect the signal spectral characteristics effectively with high resolution and accurate results. Basic principle of the method has been explained ,and the validity of the method has been verified by forward model. This method has been applied in division of cycles and depositional stages of glutenite in the north slope of the Dongying Depression,which has acquired satisfactory effect.
Time-frequency analysis is a key technology of signal analyzing and processing in geophysical exploration. It can be used in seismic cycles dividing and isochronous depositional interface identifying. However,the traditional time-frequency analysis methods have many shortcomings of low resolution and indirect result. High-order statistics time-frequency analysis method was proposed based on analyzing the present methods. The new method can reflect the signal spectral characteristics effectively with high resolution and accurate results. Basic principle of the method has been explained ,and the validity of the method has been verified by forward model. This method has been applied in division of cycles and depositional stages of glutenite in the north slope of the Dongying Depression,which has acquired satisfactory effect.
引文
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[11]石玉梅,刘天放,谢桂生.三阶累积量法在断层检测和落差估算中的应用[J].地质与勘探,2001,37(4):73-75.
[12]尹成,伍志明,邓怀群.高阶统计量方法在地震勘探中的应用[J].地球物理学进展,2003,18(3):546-550.
[13]张贤达.现代信号处理[M].2版.北京:清华大学出版社,2002:1.
[14]孔凡仙.东营凹陷北部陡坡带砂砾岩体的勘探[J].石油地球物理勘探,2000,35(5):669-676.
[15]亓雪静.利津油田砂砾岩扇体发育特征及储层评价[J].石油地球物理勘探,2006,41(4):410-414.
[16]伍松柏.东营凹陷北带不同类型砂砾岩扇体“相—势”控藏作用[J].油气地质与采收率,2008,15(3):39-42.
[2]吴国忱,康仁华,印兴耀.三维时频分析方法在地震层序分析中的应用[J].石油大学学报:自然科学版,2000,24(1):81-84.
[3]王宝江,王大兴,于波,等.利用广义S变换技术预测砂岩储层[J].石油地球物理勘探,2006,41(4):423-425.
[4]刘传虎,刘福贵,李卫忠.时频分析方法及在储层预测中的应用[J].石油地球物理勘探,1996,31(增刊1):11-20.
[5]杨培杰,印兴耀,张广智.希尔伯特-黄变换地震信号时频分析与属性提取[J].地球物理学进展,2007,22(5):1585-1590.
[6]印兴耀,张奎,张广智.联合时频分布及其矩属性的应用[J].石油地球物理勘探,2003,38(5):521-526.
[7]亓雪静,董立生,邵卓娜.二次型时频分析技术的开发与应用[J].油气地质与采收率,2007,14(3):67-69.
[8]Velis D R,Ulrych T J.Simulated annealing wavelet estimation via fourth order cumulant matching[J].Geophysics,1996,61(6):1939-1948.
[9]杨培杰,印兴耀,张广智,等.三谱混合相位子波估计与最大后验反褶积[J].石油地球物理勘探,2007,42(4):396-401.
[10]Chen C H,Chi C Y.Newcumulant-based inverse filter criteria for deconvolution of non-minimum phase systems[J].IEEE Transac-tions on Signal Processing,1996,44(5):1292-1297.
[11]石玉梅,刘天放,谢桂生.三阶累积量法在断层检测和落差估算中的应用[J].地质与勘探,2001,37(4):73-75.
[12]尹成,伍志明,邓怀群.高阶统计量方法在地震勘探中的应用[J].地球物理学进展,2003,18(3):546-550.
[13]张贤达.现代信号处理[M].2版.北京:清华大学出版社,2002:1.
[14]孔凡仙.东营凹陷北部陡坡带砂砾岩体的勘探[J].石油地球物理勘探,2000,35(5):669-676.
[15]亓雪静.利津油田砂砾岩扇体发育特征及储层评价[J].石油地球物理勘探,2006,41(4):410-414.
[16]伍松柏.东营凹陷北带不同类型砂砾岩扇体“相—势”控藏作用[J].油气地质与采收率,2008,15(3):39-42.
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