Abstract：In order to improve the precision of reservoir and fluid prediction in complex oil/gas areas and in accordance with Ng-Ed1 complex oil/gas reservoir in No.2 structure of Nanpu sag in beach of eastern part of Hebei,based on a block of 3-D ocean-bottom cable seismic data with 2ms sampling,the paper carried out integrative application of OBC processing,"three-high" (high precision,high resolution and hi-fi) processing of prestack seismic data,rock physics simulation of logging data,AVO forward modeling and inversion of elastic parameters simultaneously,which determined elastic parameters sensitive to lithologic fluid in the region; proved the shielding action of basalt in Ed bottom on seismic wave propagation in underlying beds,the variation rule of reflection coefficient slightly decreasing with incident angles increasing on the top of basalt,and AVO feature of main oil-bearing reservoirs; clarified the max incident angle in main target strata eastern Ed1 is 31°by AVO forward simulation and analysis of practical seismic data; determined the distribution of 8 favorable sand bodies by simultaneous inversion and interpretation of inverted elastic parameters sensitive to reservoir and fluid and provided 2 drilling well sites.
