薄互层高分辨率分析方法研究

The Technique of High Resolution Analysis in Thin Inter-beddings

针对我国东部陆相薄互层的地质特点和地震响应特征,应用小波分析方法,利用相似系数和能量准则将小波变换与振幅谱补偿相结合,在保持较高信噪比的前提下,给出了薄互层高分辨率分析方法。通过理论模型和实际地震数据分析表明,该方法在薄互层的横向追踪和纵向识别方面是有效的,处理之后的地震反射层特征变得更清晰,资料频带向高频拓宽,很多复波被分解,高频成分明显加强,主要突出了高、中频信息,可以刻画薄互层的内部细节,便于岩性解释、小层对比。

In allusion to the characteristics of thin inter-beddings and seismic response in the north China,by using the method of wavelet analysis,the criterion of scaling coefficient and energy was used in combination with wavelet transform and amplitude spectrum compensation,a method of high resolution analysis of thin inter-beddings was obtained.The theoretical model and the seismic data analysis shows that the method is effective in horizontally tracing and vertically identifying and it can be used to characterize the thin inter-beddings more clearly.The processed seismic plot is clearer and its frequency bandwidth increases.Its high frequency composition is obviously enhanced.The high and middle frequency information is emphasized.It separates many complex waves.It is easy and convenient for litho interpretation and thin strata contrast.