Abstract：The fractures and caves system in dense for-mation plays an important role in oil/gas accumu-lation and migration.It is difficult to use seismic data to identify and detect the fractures system in dense reservoir because of multi-scale of fracture and limitation of resolution of seismic data.In this paper,we discussed these issues and pointed out that the spatial distribution of fracture-developed zone in reservoir can be determined if proper tech-niques and strategy are used.The techniques used mainly include: application of 3D seismic multi-scale margin detection technique,correlation analy-sis of seismic numeric modeling and detection re-sults and using multi-source information such as seismic,geologic,logging and drilling for integra-tive interpretation.
