Abstract：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.
