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从研究底水突入油井的机理出发 ,讨论了底水上窜绕过夹层的过程。根据CoatsKH的底水流模型 ,计算了底水绕过夹层时的累计水侵量 ,详细讨论了夹层所在位置、大小和厚度对底水锥进的影响。研究表明 ,处于油水界面之上的夹层对底水锥进能有效抑制 ,提高了开采效果 ;夹层半径越大 ,对水侵量的减小越大 ,其有效作用时间越长 ;夹层的作用还同油层的非均质性和开采速度密切相关 ;有夹层的油藏 ,开采速度和打开程度可适当提高
Starting from the study of the mechanism of the bottom water penetrating the oil well, the process of channeling the interlayer at the bottom water is discussed. According to the bottom water flow model of CoatsKH, the cumulative water influx of bottom water around the interlayer is calculated. The influence of the location, size and thickness of the interlayer on the bottom water coning is discussed in detail. The results show that the interlayer above the oil-water interface can effectively restrain the bottom water coning and improve the mining effect. The larger the interlayer radius is, the greater the decrease of the water intrusion is and the longer the effective action time is. The function of the interlayer It is closely related to reservoir heterogeneity and mining speed; with intercalated reservoirs, mining speed and opening degree may be appropriately increased