This paper introduces structure modeling-constrained seismic inversion technique.It has four key components

i.e.well-seismic integrated small scale structure interpretation

rational design of geologic framework

multi-scale grid design and curve homogenization.Take SⅡ7-12 sedimentary units in Nanba area of Daqing Saertu oilfield as an example

the article summarizes the advantages of structure modeling-constrained seismic inversion over seismic inversion without structure modeling.①It can improve the accuracy of sandbody identification

especially channel sand and realize well-seismic integrated correction of sedimentary microfacies through "defining facies in wells and shapes on slices";②It can reveal the contact relationship between major thick reservoir and the main sand body

and refine the prediction of sandbodies near faults

so as to guide remaining oil potential tapping.It is concluded that structure modeling-constrained seismic inversion can lower the uncertainty of seismic inversion and is of great significance to oilfield development adjustment in later stage.