信噪比的估算及其在高分辨率处理中的应用

野外实际地震记录中总是包含有噪音的，在进行高分辨率处理之前，需首先了解这些噪音的强度及其频率分布范围，同时也要了解信号频谱分布范围，找出有效频带的范围，然后利用自适应频率加强和谱白化的方法提高分辨率，在有井资料的情况下，再利用测井资料所得的反射系数频谱作为约束地地震资料”监色谱校正“处理，以进一步提高分辨率。

The estimation of signal-to-noise ratio and its use in high-resolution processing

The actual field seismic data always contain noises. The intensity and the spectrumdistribution of the noises shou1d be found out before the high-resolution processing. Meantime,the intensity and the spectrum distribution of the signals shou1d also be found out in order to findthe range of effective frequency band. Then the adaptive frequency enhancement and spectrumwhitening methods are used to improve the resolution. When well log data are available, the "bluespectrum correction" processing of seismic data are performed using the refleCtivity spectrumobtained from well log data as the constraint so as to further improve the resolution. The methoddo not reduce the signal-to-noise ratio while improving the resolution, for it suppresses thefrequency band in which the signal-to-noise ratio is less than l. The actua1 data processing resultshows that the method is simple and very practica1.