短时傅立叶变换在研究沉积旋回地质体中的应用
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
针对地震波信号通常是非平稳信号,Fourier变换不适用于分析非平稳信号、不能反映局部时间信号的频谱特征的特点,而利用短时Fourier变换能够反映信号在任意局部时间范围的频率特征,以便满足研究信号在不同时间位置局部性质的要求。分别从正反旋回的地质模型出发,通过作理论记录以及用短时Fourier变换分析波在沉积旋回地层中传播时的频率变化来确定沉积旋回的类型。
The seismic signal is nonstationary, Fourier Transform is not adaptable for nonstationary signal and can't show the frequency character of time signal on local position, but the Shorttime Fourier Transform can conquer this weakness and analyze the frequency character of the local position. So we can use shorttime Fourier Transform to analyze the frequency character of the nonstationary signal. In this paper, we synthesis the theoreticalrecords for positive and negative sedimentary cycle and use the Shorttime Fourier Transform to analyze its frequency, which can help us recognize the sedimentary cycle type.
引文
[1] 何憔登.地震勘探原理和方法[M].北京:地质出版社,1986.
    [2] 蔡希玲,赵波,贺振华,黄德济.短频时间变换与地震信号分析[J].石油地球物理勘探,2001,36(4),414~421.
    [3] 宋建国.薄互层反射特征的波动理论及地震资料高分辨率处理方法研究[D].山东:石油大学,1999.
    [4] [美]渥·伊尔马滋.地震数据处理[M].黄绪德译.北京:石油工业出版社,1994.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心