Abstract: Zhou371 Block of Zhaozhou Oilfield is located in the eastern flank of nose structure,which belongs to the favorable directional zone of hydrocarbon migration.Because of the cross cutting of fault,small fault blocks and small fault-noses are developed,and the small faults has significant influence on structural feature and the oil-water relationship.The block is characterized by many faults,small fault throw,short extended distance,multi-stage development,complex cutting relationship and combination relationship,difficult in interpretation and identification of small faults.Aiming at the characteristics,we integrated coherent cube analysis technique,along-layer dip & azimuth analysis technique,frequency spectrum decomposition technique and 3D visualization technique,combining with all kinds of information such as seismic sections,identified some small faults which cannot be recognized from conventional seismic data volume,and verified the distribution and contacting relationship of the faults in the area.Meanwhile,some low-relief structures related with small faults were discovered and defined,and fine structure interpretation was realized.