利用地震属性沿层分析方法研究河流相沉积环境

 在地震垂向分辨率不足的情况下，可根据薄层地震反射振幅原理，利用薄层地震反射振幅在横向上的差异，研究每一种沉积微相地质体在横向上的几何形态和沉积特征。本文主要利用三维高分辨率地震沿层切片和沿层地震频谱成像等技术,并结合河道的空间展布特征,开展了对河道砂体沉积的地质解释和研究,推断出了沉积物源方向和砂体发育带，指出了油气储层的有利区。其中沿层地震频谱成像技术是通过频谱成像的最大能量确定的频率检测对应的地层调谐厚度，而不是直接利用地震资料的主频计算地层厚度。

Using analysis of seismic attributes along horizons to study sedimentary environment of fluvial facies

In a condition of lack of vertical seismic resolution,people can use the lateral difference of seismic reflection amplitude on the thin layers to study the lateral geometric configuration and sedimentary feature of each sedimentary micro-facies geologic body based on the principle of seismic reflection amplitude on the thin layer.Mainly using high-resolution seismic along-horizon slices and seismic along-horizon spectrum imaging technique,and combining with spatial distribution feature of channels,the paper developed geologic interpretation and study of deposition of channel sand body,inferred the direction of sedimentary derivation and development zone of sand body,and pointed out the interesting zone of reservoir,in which the seismic along-horizon spectrum imaging technique is to detect tuning thickness of associated layers through the frequencies determined by the max energy of spectrum imaging instead of directly using the dominant frequencies of seismic data to compute the thickness of layer.