多层非均质油藏定压驱替效率计算方法

发布时间：2019-05-14 04:42

【摘要】：为定量评价储层纵向非均质性对驱替效率的影响,以恒定注采压差为边界条件,推导出油井见水前后水驱前缘位置、采出端含水饱和度等随时间变化的理论公式。在此基础上,建立多层油藏总驱替效率计算方法,并应用于玉门鸭儿峡油田,计算结果由数值模型进行了验证,同时对比分析了笼统注水和分层注水因非均质性强弱不同而导致开采效果差异的原因。研究结果表明:该方法具有较高的计算精度;多层油藏分层注水驱替效率明显高于笼统注水方式,可用于非均质油藏储层精细划分和重组的定量分析。该研究成果可为油田开发中后期调整提供一定的理论指导。
[Abstract]:In order to quantitatively evaluate the influence of reservoir longitudinal heterogeneity on displacement efficiency, the theoretical formulas of water drive leading edge position and water saturation at production end with time are derived with constant injection-production pressure difference as boundary condition. On this basis, the calculation method of total displacement efficiency of multi-layer reservoir is established and applied to Yumen Yazerxia Oilfield. The calculated results are verified by numerical model. At the same time, the reasons for the difference of mining effect caused by the heterogeneity of general water injection and stratified water injection are compared and analyzed. The results show that the method has high calculation accuracy, and the displacement efficiency of layered water injection in multi-layer reservoir is obviously higher than that in general water injection mode, and can be used for quantitative analysis of fine division and recombination of heterogeneous reservoirs. The research results can provide some theoretical guidance for the adjustment of oil field development in the middle and late stages.
【作者单位】：北京大学;中国石油勘探开发研究院;辽河石油职业技术学院;
【基金】：中国石油重大科技专项“低品位油藏规模有效动用配套技术与对策”(2012E-3304)
【分类号】：TE32

【参考文献】