摘要
子波相位谱消去法是通过话因式分解并以最大的方差模为准则求得子波相位港，然后将其从地震造的相位谱中消去。与常相住校正方法相比，该方法不要求于波各分频的初相位角为常数。模型实验表明，该方法具有良好的稳定性和对主频变化的适应性，首尾于波的主频相差30Hz时仍能得出很好的结果，这就使得我们对地震道可一次进行全道处理，而不必进行分段处理；对于最小相位地震道及接近最小相位的混合相位地震道，该方法具有较好的容噪能力。对于最大相位地震道及接近最大相让的混合相位地震道，当记录的信噪比较高时也有较好的效果。
The wavelet-phase-spectrum elimination method is a new method to make the seismic trace to be in zero-phase. The spectrum of the wavelet is obtained by the factor-analysis and the maximum variance is used as the discrimination criterion to eliminate it from the seismic record. This method doesn't require the spectrum of the wavelet to be a constant,which is necessary for the APC method- Test by the model indicates that this method has good effect,good stability and good adaptability to the frequency change of the wavelet of the trace,and when the frequency difference between the first and last wavelets is as high as 30 Hz, it can also gets a good result. This makes it convenient for us to process the whole trace not in segments but only in one time. When the wavelet of the trace is in minimum-phase or mixed-phase but close to minimum-phase,this method has a good noise-resistant ability. When the wavelet of the trace is in maximum-phase or mixed-phase but close to maximum-phase,this method requires the trace to have a higher s/n ratio.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1999年第4期89-96,共8页
Marine Geology & Quaternary Geology
关键词
子波相位谱
消去法
地震道
地震勘探
零相位化
wavelet zero phase
wavelet phase spectrum elimination method
seismic trace
