Abstract: Structural conditions as one of the elements of oil and gas accumulation, attracted widespread attention in the oil and gas field exploration and development. Typically, the lower the accuracy of regional exploration, structural studies were focused on the basin frame; high rolling exploration and research on the structure of the accuracy requirements of the block structure of the internal small fine interpretation and depiction is the key to the success of drilling. In the structural conditions extremely complex Dongpu depression, mainly in the oil and gas reserves among the block group, the regional tectonic conditions are relatively clear, to block the internal structure of the small fine description of rolling exploration focus. How to carry out the internal structure of complex fault block? Making research and services in the oil exploration and development, not only an important task Dongpu depression, but also in eastern China hotspot rift basin. I try to take advantage of three-dimensional seismic interpretation; seismic data between wells describe small structures, numerical simulation techniques Wen 209 fault throw of less than 5 m were forecast to achieve fine structure described in the block area.