In order to implement the structural characteristics and improve the description accuracy of the reservoir, and the macroscopic residual oil, the sedimentary microfacies located in Block B28 of Beier Depression within Hailar Basin is delineated with 3D geological modeling. Through the well to seismic tie for structural interpretation, the fault system and structural development characteristics were implemented, and then the high-resolution stratum framework was established, the fine comparison of sedimentary units was completed, the seismic attributes and the results of inversion are applied to carry out the reservoir prediction and sedimentary facies research, and also carried out the facies-control attribute modeling. 33 pay zones of Block B28 in fine pay zones were correlated and sedimentary unit subdivision was conducted. Block B28 develop fan deltas front, and the underwater distributary channel extends from south to north, Oil zone I forms in the lacustrine expansion period, the sand body extends from southeast to northwest, and the thickness gradually decreases. Oil zone II is deposited under the condition of lacustrine retreating. Oil zone III does not develop fan body, mainly large lacustrine depostition. Fine fault model and structural model were established. The top surface structure of Xinganling Formation was depicted with faults for NE~NEE stretch, the structural style exhibit antithetic faults or synthetic faults, fault-horst~fault graben and listric faults. This study not only has practical significance for the exploration and development of Hailar Basin, but also plays a role in enriching and improving the geological theory of oil reservoirs in Hailar Basin, and also has reference significance for the exploration and evaluation of oil and gas fields with similar geological conditions.