Abstract: Take a certain oil field in Bohai Sea for instance. The analysis is made on the basis of numerical experiment, studying the five factors influencing single-well polymer flooding injectability, such as formation permeability, formation crude oil viscosity, polymer viscosity, polymer injection rate, and polymer injection time. Then, the functional relationship between the influencing factors and injectability under the conditions of a single factor is acquired from the study. Based on calculation of different influencing elements, the factors influencing polymer flooding injectability are ranked according to the order of importance, with the formula for rapid calculation of the single-well polymer injectability acquired. The formula is tested on the basis of indoor experiment and dynamic analysis. The results show that this formula is simple, workable, accurate and reliable.

Key words: polymer flooding, injectability, numerical experiment, influencing factors, EOR

摘要： 以渤海某油田为对象,通过数值实验,分析研究了包括地层渗透率、地层原油黏度、聚合物黏度、聚合物注入速度、聚合物注入时机5种因素对单井聚合物驱注入能力的影响,并得到单因素条件下各影响因素与聚合物注入能力的函数关系。通过不同因素影响因子的计算,得到各因素对聚合物注入能力影响的重要性排序以及单井聚合物注入能力的快速计算公式。通过室内实验及动态分析对该公式进行验证,结果表明,该公式简便易行、准确可靠。

关键词: 聚合物驱, 注入能力, 数值实验, 影响因素, 提高采收率