Abstract：Wenan slope experienced twice reversals and three faultings, namely, NE faulting, NW faulting and NEE faulting. The characteristics between the North and the South were quite different. The two netty faults in Suqiao area were in NE and NW dト rections. In the central Shigezhuang area, NEE faults were developed en echelon distribution. In Changfeng town of the south part, NE faults were arranged in parallel. Controlled by faults in Wenan slope, three structure zones were developed: Su-qiao-Xinanzhen fault structure zone, a nose structure zone in Shigezhuang, and a nose structure zone in Changfengzhen- Y llunpu. Using merging 3D seismic data, we analyze in this paper the overall structures and obtain the following understanding：① Hydrocarbon source rocks in Baxian Depression was deep, thick, and large;② As exploration targets, there are multilayer in buried hills of the slope;③Tight sandstones in the slope may be deep low-abundance tight sandstone reservoirs;④ Horizon-lithology reservoirs outside the slope may have geological conditions for large multi-layer hydrocarbon resources.
