Tazhong area in the Tarim Basin is the focus of the exploration area, the Ordovician Yingshan Formation encompassed the rich oil and gas resources. Yingshan developed a large set of platform facies carbonate rocks, with high-energy deposition relative to the main of intra-platform shoal. Yingshan buried deep, but a large area of karst reservoir was thick layered distribution. Early Ordovician fracture TaZhong I, making the TaZhong uplift uplifted and subjected to intense erosion to form at the top of the Lower Ordovician weathering crust Yingshan to vuggy and fracture - vuggy type reservoirs. Through the ancient landscape restoration, seismic attribute analysis and seismic acoustic impedance inversion joint logging techniques and methods of identifying cave development zone and the fault fracture zone, determine the scope of the distribution of favorable reservoirs. Studies suggest that lithology facies development of karst reservoir is an important basis for interlayer karst control of the reservoir into a horizontal layer of the Spread and the scale of fracture and fracture network is the main karst water percolation channel, buried karst formation the number of available fractured-vuggy space, which greatly improved reservoir properties. The study found that high-quality reservoirs are mainly distributed in the following top 120m Yingshan stratigraphic thickness within a certain horizontal connectivity, and in faults, structural fractures and corrosion under the action of the formation of a unified reservoir, was quasi-layered Spread.