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人工夹层在油田开发的堵水防水中具有重要作用。从研究底水突入油井的机理出发 ,分析了底水上窜绕过人工夹层的过程。讨论了K H Coat的底水流模型 ,对底水绕过夹层时的累计水侵量进行了计算 ,分析了夹层所在的位置、大小和厚度对底水锥进的影响。研究表明 :人工夹层处于油水界面之上对底水锥进能有效的抑制 ,使开采效果得到提高 ;夹层半径越大 ,水侵量的减小越多 ,夹层的有效作用时间越长 ;人工夹层的作用还同油层的非均质性和开采速度密切相关。最后给出了带夹层底水油藏水侵量的计算公式
Artificial sandwich in the oil field development of water and waterproof play an important role. Based on the study of the mechanism of the bottom water breakthrough into the oil well, the process of channeling over artificial sand on the bottom water was analyzed. The bottom water flow model of KH Coat is discussed. The cumulative water influx when the bottom water is bypassed is calculated. The influence of the location, size and thickness of the interlayer on the bottom water coning is analyzed. The results show that the artificial sandwich can effectively inhibit the bottom water cone above the oil-water interface and improve the mining effect. The larger the radius of the interlayer, the smaller the water intrusion and the longer the effective duration of the interlayer. The role is also closely related to reservoir heterogeneity and recovery rates. Finally, the calculation formula of water influx in the reservoir with interlayer water is given