The difference in oil-water flow and the dispersion and enrichment of remaining oil in water drive reservoirs at an ultra-high water cut stage are becoming increasingly serious. To formulate an efficient dynamic development strategy for reservoir on a large scale，we propose a dynamic tracking model of flow field boundaries based on the idea of interface reconstruction，and predict the evolution laws of the interfaces with differences in velocity and saturation of two-dimensional and three-dimensional flow fields. Also，we conduct a test for the quantitative characterization of the high-velocity and high water-cut flow field boundaries in reservoir blocks at an ultra-high water-cut stage，and verify the feasibility of its engineering application with development strategies. With the classic black-oil model and the dynamic flow-line tracking equation，we introduce the idea of interface reconstruction to the multiphase interface tracking method，devising a set of quantitative characterization methods for flow field boundaries considering dynamic and static factors. Combining the interfaces with differences in flow velocity and water saturation of two-dimensional flow fields and those with differences in flow velocity and oil saturation of three-dimensional flow fields，we divide reservoir flow fields into a high-velocity oil displacement area，a high-velocity water consumption area，a low-velocity water-rich area，and a low-velocity oil-rich area. This model can track the dynamic process of flow field boundaries from birth to development，and then to stabilization，and its feasibility is verified by the test on the application of the development strategy.