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由于平台和开发投资的限制，海上油田在高含水期实施细分层系，而从理论及矿场分层产能测试结果可知：随着油田进入高含水阶段，多层合采油田层间干扰除了受纵向非均质性影响外，更受到纵向各层压力和含水等动态因素的影响。针对目前对高含水期层间干扰定量表征及层系划分界限研究较少的问题，在研究引起层间干扰的动、静态因素基础上，提出了层间动态干扰概念，并运用渗流理论建立了层间动态干扰系数定量表征数学模型，得到了多层合采砂岩油藏在高含水期动态干扰系数与纵向各层渗透率、含水率及压力的定量关系。结合数值模拟方法建立了高含水期油田细分层系界限：渗透率级差小于5.0，含水率级差小于1.7，压力级差小于1.6。以此为基础在渤海SZ油田高含水期实施了细分层系先导试验，利用细分层系界限制订了合理的层系划分与组合方式，细分层系后试验区平均日增油达20%，含水率降低10%，采收率提高5%。研究成果为海上油田高含水期层间矛盾的定量评价及降低层间矛盾策略的制订提供了借鉴。
Due to platform and development investment constraints, offshore oilfields are subdivided into high-water cut stages. From theoretical and field stratified capacity test results, it can be seen that with the oilfield entering the high water cut stage, Influenced by longitudinal heterogeneity, it is also affected by dynamic factors such as vertical pressure and water content in various layers. In view of the current research on the quantitative characterization of inter-layer interference in high-water-cut period and the few research on the boundary of stratified division, this paper proposes the concept of inter-layer dynamic disturbance on the basis of studying the dynamic and static factors that cause inter- The mathematical model was established to quantitatively characterize the inter-layer dynamic interference coefficient, and the quantitative relationship between dynamic disturbance coefficient and permeability, moisture content and pressure in various layers of the co-occurrence sandstone reservoir was obtained. Combined with numerical simulation method, the boundaries of subdivision strata of oilfields in high water cut stage are established: the permeability difference is less than 5.0, the water content difference is less than 1.7 and the pressure difference is less than 1.6. Based on this, the subdivision pilot test was carried out during the high water cut period of SZ oilfield in Bohai Sea. Based on the boundaries of subdivision strata, rational stratigraphic division and combination were established. After subdivision, the average daily oil increase of the test area reached 20 %, Moisture content decreased by 10%, recovery rate increased by 5%. The research results provide a reference for the quantitative evaluation of inter-layer conflicts in the high-water-cut period of offshore oilfields and the formulation of tactics to reduce inter-layer conflicts.