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现代地质 ›› 2010, Vol. 24 ›› Issue (2): 392-396.

• 地球物理及遥感技术 • 上一篇    下一篇

利用小波变换分析随机-均匀介质尺度特征

李灿苹1,刘学伟2,赵桂艳1   

  1. 1.广东海洋大学 信息学院,广东 湛江524088; 2.中国地质大学 地球物理与信息技术学院,北京100083
  • 出版日期:2010-04-20 发布日期:2010-05-10
  • 作者简介:李灿苹,女,讲师,1977年出生,地球探测与信息技术专业,主要从事散射波地震勘探理论及信号处理方面的研究。Email:canpinglihydx@163.com
  • 基金资助:

    国家重点基础研究发展计划项目(2009CB219505);广东海洋大学人才引进专项基金项目(0812182)

Analyzing Scale Characteristics of Random-Uniform Medium by Wavelet Transform

 LI  Can-Ping1,LIU  Xue-Wei2, ZHAO  Gui-Yan1   

  1. 1.School of Information, Guangdong Ocean University, Zhanjiang, Guangdong524088,  China;
    2.School of Geophysics and Information Technology, China University of Geosciences, Beijing100083,China
  • Online:2010-04-20 Published:2010-05-10

摘要:

为研究复杂非均匀介质中非均匀体的尺度特征,建立了随机-均匀介质模型,利用小波变换方法,对随机-均匀介质3种地震波(直达波、散射波和反射波)的尺度特征进行了分析和研究。结果表明:3种地震波表现出不同的尺度特征,直达波表现出大尺度特征,散射波次之,反射波具有小尺度特征;随着模型参量横向自相关长度的增大,直达波的最佳尺度呈下降趋势,散射波和反射波的最佳尺度呈上升趋势。研究结果为利用小波变换分析地震剖面中地震波以及非均匀体的尺度特征提供了参考。

关键词: 小波变换, 随机介质, 自相关长度, 最佳尺度

Abstract:

To study scale characteristics of heterogeneities in complex heterogeneous medium, this paper constructed random and uniform media models. Scale characteristics of three kinds of seismic waves, namely direct wave, scattered wave and reflected wave, in random and uniform media were studied and analyzed by wavelet transform. The results showed that three kinds of seismic waves behaved different scale characteristics, and direct wave behaved large scale characteristic, and scattered wave was second, and reflected wave behaved small scale characteristic. With lateral autocorrelation length of model parameter becoming larger, optional scale of direct wave had a trend of decrease, and optional scale of scattered wave and reflected wave had a trend of increase. Therefore, the research of this paper offered a reference to analyze scale characteristics of heterogeneities and seismic wave in seismic section by wavelet transform.

Key words: wavelet transform, random medium, autocorrelation length, optional scale

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