摘要
在地震数据处理中,频谱分析是不可缺少的重要环节。PE—3284机TRAFO模块是采用FFT算法进行频谱分析的。由于频谱的分辨率与被处理的时窗长度成正比,当时窗长度小于2000ms时,分辨率很低,不能用于实际生产。本文提出用样点加密和补零充位的方法提高频谱分辨率,效果明显,方法简单,对时窗长度大于75ms的谱分析,完全能满足实际处理需要。
The analysis of frequency spectrum is an important link in seismic data processing. The algorithm of FFT(Fast Fourier Transform) is used in the module TRAFO to analyze the frequency spectrum. Its resolution is directly proportional to the length of time window. When the length is smaller than 2000ms, the resolution is too low to be used in processing. A wonderful method of interpolating samples and setting the value of interpolating samples to zero, vhich makes the resolution higher, is presented in this paper. It is easy to use, and can make a good result. If the length of time window is larger than 70ms, the resolution of frequency spectrum can certainly meet the needs of the practical processing.
出处
《西南石油学院学报》
CSCD
1991年第1期23-28,共6页
Journal of Southwest Petroleum Institute
关键词
地震数据处理
频谱分析
地震勘探
Seismic Data Processing
Analysis of Frequency Spectrum
Method of Jnferpolating Sampies and Setting the Value of Interpolating Samples to Zero
