S变换时频分析在隧道岩溶地震勘探解释中的应用
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摘要
介绍了短时傅立叶变换、小波变换和S变换的优缺点及其彼此间的相互关系。详述了S变换的概念及性质,认为S变换方法具有良好的自适应性和时频分辨率,能提供高质量的时频谱信息。将S变换时频分析用于宜万铁路隧道地震映像法数据解释。结果表明,S变换时频剖面上的溶洞异常显示比时间剖面更为清晰,在推断岩溶的分布位置、大小、埋藏深度等方面具有良好效果。S变换方法有助于提高地震数据解释的精度和准确性。
This paper shows the advantages,disadvantages and correlation of Short-Time Fourier Transform,Wavelet Transform and S-Transform.Expatiating the idea and property of the S-Transform,we find that the S-Transform method has favorable self-adaptability and time-frequency resolution and can provide high-quality time-frequency information.We use S-Transform Time-Frequency Analysis to interpret seismic imaging data under tunnel of YiChang-WanZhou Railway.The result indicates that the abnormal karst caves represented by S-Transform time-frequency spectrum are clearer than that in the original seismic profile.In the filed of determining the location,size,burial,depth of karst caves,S-Transform is a good method.S-Transform helps to improve the interpretative precision and accuracy of seismic imaging data.
This paper shows the advantages,disadvantages and correlation of Short-Time Fourier Transform,Wavelet Transform and S-Transform.Expatiating the idea and property of the S-Transform,we find that the S-Transform method has favorable self-adaptability and time-frequency resolution and can provide high-quality time-frequency information.We use S-Transform Time-Frequency Analysis to interpret seismic imaging data under tunnel of YiChang-WanZhou Railway.The result indicates that the abnormal karst caves represented by S-Transform time-frequency spectrum are clearer than that in the original seismic profile.In the filed of determining the location,size,burial,depth of karst caves,S-Transform is a good method.S-Transform helps to improve the interpretative precision and accuracy of seismic imaging data.
引文
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[2]邹文,陈爱萍,顾汉明.联合时频分析技术在地震勘探中的应用[J].勘探地球物理学进展,2004,26(4):246～250.
[3]陈雨红,杨长春,曹齐放,等.几种时频分析方法比较[J].地球物理学进展,2006,21(4):1180～1185.
[4]杨林,顾汉明,李宗杰,等.基于时频分析技术预测碳酸盐岩缝洞储层[J].天然气工业,2008,28(6):37～39.
[5]邹文,陈爱萍,贺振华,等.基于S变换的地震相分析技术[J].石油物探,2006,45(1):48～53.
[6]秦维明,周安.S-变换在地震映像溶洞探测中的应用[J].湖南科技学院学报,2008,30(8):69～71.
[7]吴宝杰,杨桦,张伟光.探地雷达数据的S变换时频分析[J].上海地质,2008,3:13～15.
[8]Stockwell R G,Mansinha L,Lowe R P.Localization of the Complex Spectrum:the S-Transform[J].IEEE Transactions on Signal Processing.1996,44(4):998～1001.
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