Abstract: The gas reservoir of deep Xujiahe Formation in Western Sichuan Depression is a typical fractured gas reservoir,which is characterized by deep-buried,extra-high pressure,extra tight,low porosity and permeability.Fracture detection is one of the technical difficulties to be urgently solved in exploration and development in this area.Aiming at the limitation and multi-solution problems of the conventional fracture prediction methods,we studied the curvature attribute that is a practical seismic attribute.The curvature attribute was applied on the fracture detection in XC Block of Xinchang area,Western Sichuan Depression.Actual application result is coinciding well with drilling data.Meanwhile,the detection scale of curvature is smaller than that of coherent cube attribute,which is more effective in high coherence area where coherence attribute may be invalid.So,curvature attribute will be worth to be popularized and applied in fracture prediction.