特高含水水驱油藏流场边界动态追踪模型研究

特高含水水驱油藏油水流动差异、剩余油分散富集现象日益严重.为了从宏观尺度制定油藏动态高效开发策略,提出一套基于界面重构思想的流场边界动态追踪模型,预测了二维及三维流场的速度差异界面、饱和度差异界面演化规律,完成了特高含水油藏区块高速、高含水流场边界定量表征的测试,并制定开发对策验证其工程应用的可行性.在经典黑油模型基础...

Study on the dynamic tracking model of flow field boundaries in water drive reservoirs at ultra-high water cut stage

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 re?construction,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 en?gineering 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 inter?faces 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 displace?ment 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.