应用三维相干技术进行精细地震解释

3-D coherency cube technique applied to fine interpretation

石油物探研究所,南京210014

Institute of Petroleum Geophysical Prospecting, CNSPC, Nanjing 210014

三维相干数据体技术是利用三维地震数据体中相邻道之间地震信号的相似性来描述地层、岩性的横向非均匀性。本文介绍了多道相关技术的数学原理,实际应用证明,三维相干技术不仅可以快速、准确地确定断层的平面展布及其细节特征,而且可以利用其提供的地层产状信息研究目标储层的构造沉积演化体系。

The 3-D coherency cube is a recently developed seismi c interpretation t echnique. It uses the similarity of seismic signals between adjacent traces in 3 -D seismic volume to describe the lateral stratal and lithologic inhomogeneity. This paper introduces the mathematical basis of multi-trace coherency techniqu e. Real data test shows that the 3-D coherency technique can determine the faul t plane extent and its detailed features quickly and accurately, and the stratal occurrency information provided by the technique can be used to study the struc tural and sedimentary evolution system of object reservoirs.