地震相干体技术简介及其应用

通过对三维数据体各种逻辑关系和物理属性的分析研究，认为地震三维数据体的不连续性主要反映断层和岩性的变化；连续性则主要反映岩性的均一性和地层的连续性。根据这一特点，利用地震相干体技术可在相干切片上直观地反映构造和断层的分布情况。通过方法介绍、程序设计和地震相干体技术应用的两个实例，展示该技术在三维地震资料处理中的应用效果。

SEISMIC COHERENCE CUBE TECHNOLOGY AND ITS APPLICATION

Small regions of seismic traces cut by a fault surface generally have a different seismic character with the corresponding regions of neighboring traces. Missing stratigraphic section from one side of a fault to another generates slightly different reflectivity on one side of the fault. This results in a sharp discontinuity in local trace to trace coherence. The coherence is lower when the traces are less similar. On the basis of the principle of seismic coherence cube technique, we use the program tools of MOTIF to develop a software on the UNIX system station. It can be used to trace discontinuity in the 3D seismic volume. From that we can get a 3D correlation volume and then the fault information slice. It can quickly provide a view of regional faulting to the geoscientists. Through processing the fault slices of horizon T1 standard reflection in two projects of Dagang oil field, we draw a conclusion that this kind of correlation method shows you a real fault system. On the other hand, the interface of software is very nice, it can be manipulated easily. The result of software makes the people of interpretation form the best plan quickly, save time and reduce more work quantities.