基于扩散滤波方法的小断层识别技术

扩散滤波技术是-种能保留倾角和地层接触关系反射信息的滤波方法,去噪功能强,有利于提取表征岩相的地震地貌信息。据涠洲A油田开发证实,小断层解释的准确性是增产的关键问题。文中通过对该区地震资料进行扩散滤波处理,然后采用倾角、方位角控制进行相干计算,最后通过沿层切片分析了小断层的平面展布规律,重点对流三段含油储层范围内的小断层进行了解释,解释结果与实际钻井的油水关系、压力等资料相吻合。

Minor fault interpretation based on diffusion filter

Diffusion filtering not only has strong de-noising capability,but also can retain reflection information of inclination and stratigraphic contact relationship.So it is conducive to extract seismic geomorphology information that represents lithofacies.The accurate interpretation of minor faults can increase oil production,which was confirmed by Weizhou A Oilfield development.We firstly adopt diffusion filtering on seismic data.Then we perform coherent calculations controlled by dip-azimuth.Finally,we analyze minor fault planar distribution characters based on horizontal slices and interpret especially the minor faults of Liushagang III within oil reservoirs.The results show that the interpretations coincide very well with the oil-water relation,pressure and other data.