Abstract：Xujiaweizi fault depression is a continental volcanite rock basin.Fractured activity is a primary factor controlling volcanic activity and volcanite distribution.The paper studied and predicted volcanite in a studied area by using multiple seismic attribution and determined distribution feature of volcanite in a plane:volcanite appears as strip distribution like a string of beads along basement fracture.What's good or bad for physical characteristics of volcanite reservoir,besides controlled by primary pore,the secondary pore system and limestone cave are also key factors.The dipping upwards fault-block is that oneself formed relatively independent hydrocarbon-formed unit caused by violent fractured activity and a different kind of traps can be formed.It's favorable site for storing deep gas and inorganic gas.The study has identified totally 9 volcanite body in the area,among which 6 belong to first class of prospective exploration area.
