Abstract: Reservoir characterization technique is to finely characterize reservoir shape and accurately determine reservoir distribution and reserves scale by integrating multidisciplinary knowledge and using advanced computer technologies. This paper mainly introduces fine structural interpretation of seismic data of the Block Pu98 with RM and Jason software. The seismic data set of amplitude type is conversed into lithological data set of acoustic impedance type. Prediction of reservoir parameters and reserves calculation are performed through integrating seismic, geological, logging, core and reservoir engineering data.