地震体属性分析技术及应用

Analysis of seismic volume attributes and their application

本文对倾角及方位角、相干、曲率、纹理和频谱峰值等体属性进行了深入的地质和地球物理解读,并成功地应用于储层描述和流体检测。构造导向滤波在提高地震资料信噪比的同时,还能提高断层的解释精度;最负曲率用于刻画潜山顶面的古水流;最正曲率用来确定构造裂缝发育带;方位曲率可以用来分解结构的延伸方向;体纹理属性则很好地指示有效裂缝发育带。体属性的恰当使用可以取得常规解释手段无法获得的效果。

The paper discusses the geological and geophysical meanings of seismic volume attributes,such as dip,coherence,curvature,texture,spectral peak and so on.These seismic volume attributes are successfully applied in reservoir characterization and hydrocarbon detection.Structure-oriented filtering can improve not only S/N ratio but also fault interpretation.The most-negative curvature is used to delineate palaeo-currents.The most-positive curvature is used to describe the distribution of fractures associated with stress.Euler curvature details the deformation at azimuth,and volume texture highlights fractured zones.Applications of appropriate volume attributes can achieve very good interpretation results,but conventional means cannot.