基于快速傅里叶变换的复地震道分析及应用

Analysis and Application of Complex Seismic Trace Based on FFT

为了实现希尔伯特变换的快速计算,本文以FFT快速傅里叶变换为基础,对原算法进行了改进。将改进后的算法应用于合成地震记录计算瞬时振幅、瞬时相位和瞬时频率,获得了较好的效果。单道理论计算和实际应用表明,该方法运算效率高速度快,有助于地震资料的薄互层分析。

In order to improve the operation tempo of Hilbert transform, this paper recomposed the primary operation method on the basis of FFT （Fast Fourier Transform Algorithm）. Compared with the original method, the improved one has better effect on the calculation of instantaneous amplitude, instantaneous phase and instantaneous frequency in the synthetic seismogram. Combating with theoretical calculation and practical application, this method is faster and better for calculating. It will contribute to analyzing the reciprocal thin layers and promoting the accuracy of the digital in seismic data.