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以胜利油区中高渗整装砂岩油藏典型相对渗透率曲线为例,结合流管法计算分析了甲型和乙型水驱特征曲线在高含水期上翘的特征,讨论了油水粘度比、渗透率、束缚水饱和度、残余油饱和度、水油相渗端点比值等因素对上翘现象出现时机及采收率预测偏差值的影响。研究表明,上翘含水时机的主要影响因素为油水粘度比和相对渗透率曲线。在几个影响因素中,相对渗透率曲线对上翘含水时机的影响主要来自于相渗端点比值的差别。
Taking the typical relative permeability curve of medium and high permeability integrated sandstone reservoir in Shengli oilfield as an example, the characteristics of the curves of type A and type B water flooding in the high water cut stage were analyzed and combined with the flow tube method. The viscosity ratio of oil to water, Permeability, irreducible water saturation, residual oil saturation, water-oil end-point permeability ratio and other factors on the up-tilted phenomenon timing and recovery prediction error. The results show that the main influencing factors for the timing of aqueous uptake are the oil-water viscosity ratio and the relative permeability curve. Among several influencing factors, the influence of relative permeability curve on upturning and hydration timing mainly comes from the difference of the end-point ratio of permeability.