Abstract: Through the application of reservoir inversion based on wave impedance inversion of Zhangdian oilfield in Nan-yang sag, the plane geometry, porosity, permeability and water saturation of the periphery of thin sand in Niusan-men of Nanyang sag has been predicted, and then a detailed description of reservoir characteristics has been made. Based on the theory of seismic stratigraphy, and after comprehensive analysis on favorable exploratory targets, geometric arrangement of Nan 75, Nan 76 and Nan 79 has been suggested. The good geological result shows that using reservoir parameter inversion technique to find out favorable traps and provide drilling target is effective in maturing field during rolling exploratory development stage.