The depth of target layer of ordovician in Shunbei oil and gas field is about 8 000 m, 3d seismic data acquisition panel is 25 m ×25 m, the resolution of seismic data is low, it is difficult to describe and characterize the ordovician Yingshan fault-controlled reservoir in Shunbei oil and gas field. Based on the data of conventional logging, electrical imaging, remote detection and coring, the structure analysis of fault-controlled body, the fracture zone, fracture breccia zone and the distribution of fracture cavity in fault-controlled body reservoir under different stress were carried out. The study shows that the main reservoir space of fault-controlled body oil and gas reservoir comes from fault cavity, breccia pore and structural fracture formed by multi-stage structural activity, and different stress mechanism determines the development degree of fault-controlled body, the fracture cavity and fracture zone are easily formed in the tension background, and the broken breccia zone and fracture zone are easily formed in the compression background. The typical nuclear zone structure is often developed in the fault-controlling body, and the fracture zone has a wide width (0.35-1.64 km) and a wide distribution, the width of breccia belt is the next (0.44-0.93 km) , and the range of distribution is moderate. The width of fracture cavity is the smallest (0.25-0.35 km) , and the range of distribution is small, mainly concentrated in the area of local tensile stress.