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Combined with the characteristics of well pattern with high density and abundant dynamic and static data, the application of well-seismic technology in tapping the potential of remaining oil can improve the exploitation level of remaining oil. Through fine structural interpretation and hierarchical method, the practical application of well-seismic combination technology is discussed. Well-seismic combination depicts sedimentary facies, analyzes sand body characteristics, uses fine digital reservoir simulation to analyze remaining oil distribution characteristics, and studies the tapping process of different types of remaining oil, providing technical support for the next development adjustment and scheme optimization.