| 基于局域波分解的地震信号时频属性提取 |
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| 引用本文： | 张宁,刘喜武,高伟,刘婉莹,李达.基于局域波分解的地震信号时频属性提取[J].中国海洋大学学报(自然科学版),2008,38(5). |
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| 作者姓名： | 张宁 刘喜武 高伟 刘婉莹 李达 |
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| 作者单位： | 中国海洋大学海洋地球科学学院,山东,青岛,266100 |
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| 摘 要： | 局域波分解可以得到有意义的频率并可以抑制时频分布交叉项,是1种新的自适应信号分解方法.在局域波分解基本原理的基础上,研究基于局域波分解的地震信号分频谱及频率属性的提取方法.将局域波分解与传统时频分析结合,进行有效数值实现与对比分析,通过模型地震数据与实际2D地震数据试算验证方法的正确性和有效性.研究表明:基于局域波分解的Wigner时频分布分频谱,具有较高的时频分辨率,交叉项得到简单有效的抑制;基于局域波分解的时频分析方法计算提取的频率属性,避免无意义的负频率,物理意义明确,为在地震储层研究和油气检测中的正确应用奠定基础.
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| 关 键 词： | 局域波分解 内蕴模式函数 算法 分频谱 频率 |
Time-Frequency Attributes Extraction from Seismic Signals Based on Local Wave Decomposition |
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| ZHANG Ning,LIU Xi-Wu,GAO Wei,LIU Wan-Ying,LI Da.Time-Frequency Attributes Extraction from Seismic Signals Based on Local Wave Decomposition[J].Periodical of Ocean University of China,2008,38(5). |
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| Authors: | ZHANG Ning LIU Xi-Wu GAO Wei LIU Wan-Ying LI Da |
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| Institution: | ZHANG Ning,LIU Xi-Wu,GAO Wei,LIU Wan-Ying,LI Da(School of Marine Geo-Science,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | Local wave decomposition(LWD) is a new method for signal decomposition to obtain the meaningful frequency and suppress cross terms.On the bais of fundamentals of the local wave decomposition method,frequency decomposition spectrum and frequency extraction from seismic signals based on the local wave decomposing method are studied.Combining the local wave decomposition with the traditional time-frequency method,the numerical algorithms are implemented with usage comparison between the modelled signal and 2D ... |
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| Keywords: | spectral decomposition local wave decomposing IMF algorithm frequency |
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