Abstract: Considering the actual conditions of multi-layer,heterogeneity in a layer or between layers and nonsymmetrical well pattern,on the base of Buckley-Leverett water flooding theory for a homogeneous formation with symmetrical well pattern,a method to predict single-layer residual oil distribution and dynamic index has been proposed.Section test data of injection and production wells has been used properly.According to the theory of potential superimposition,the model to predict pressure distribution in a heterogeneous formation has been established.Compared with the numerical modeling,the software of the method in this paper runs more quickly and requires less built-in storage and capacity.Moreover,it may match lamination test and well point dynamic data automatically.Examples have shown that the method to predict the distribution of single layer remaining oil in this paper is feasible.

Key words: formation, remaining oil, heterogeneity, dynamic analysis, prediction method

摘要： :针对注水砂岩油田开发过程中,多油层同采、油层层间、平面非均质以及单层内不对称布井的实际情况,根据井点、层系、区块动态指标变化规律,充分利用水井吸水剖面(分层指示曲线)和油井分层测试资料,在Buckley-Leverett均质对称布井水驱油模型的基础上,建立了非均质、不对称布井、各向异性条件下单层剩余油饱和度分布、分层动态指标预测模型;利用势的叠加原理,给出了非均质油层压力分布预测模型.与数值模拟方法比较,用本文建立的方法编制的软件具有运算速度快、所需计算机内存和容量小、能够自动拟合分层测试和井点动态资料的特点,通过实例分析及应用,证明本文提出的预测单层剩余油分布的方法是可行的.

关键词: 油层, 剩余油, 非均质, 动态分析, 预测方法