小波域提取地震信号瞬时参数

Obtaining Instantaneous Characteristic of Seismic Signals in Wavelet Domain

利用复地震道技术可以提取瞬时振幅、频率、带宽等瞬时参数。这些瞬时参数对地震资料解释,油藏描述和岩性解释等都具有重要的意义。由于小波变换具有良好的时间-尺度局部化特性,因此可以在小波分解的时间-尺度域提取地震信号的瞬时参数。本文利用解析小波尝试在小波域提取地震瞬时频率和带宽。实验表明,此方法可以得到高分辨率的瞬时参数频率,有利于对地震剖面进行精细解释。

Complex seismic trace technique has been used to obtain instantaneous parameters, which are of great importance to seismic data interpretation, reservoir description and lithologic information obtainment. The wavelet transform may be taken to obtain instantaneous parameters because of its good partial time-scale characters. This paper tries to obtain instantaneous frequency and bandwidth in wavelet domain. It is shown that the method can be well used to obtain instantaneous parameters, which is helpful to fine interpretation of seismic data.