应用阻力系数优化聚合物驱参数

Application of resistance coefficient to optimizing parameters in polymer flooding

为了合理的匹配聚合物的注入速度、注入浓度和聚合物的相对分子质量,根据阻力系数和残余阻力系数的关系以及相对渗透率曲线,对于一定的油层条件应该匹配多大的阻力系数进行了研究。结果表明,在聚合物驱过程中,使聚油流度比小于等于1的条件是聚合物驱阻力系数大于等于水油流度比,因此,可以采用聚合物的阻力系数进行聚合物驱参数优化或设计,采用该方法可以实现注聚合物单井的个性化设计,进一步提高聚合物驱采收率。

In order to reasonably match injection rate, injection concentration and molecular weight of polymer,how many resistance coefficient should be matched at certain oil - bearing formation condition was researched according to the relationship between the resistance coefficient and residual resistance coefficient and relative permeability curve. The results presented that the condition making polymer - oil mobility ratio less than 1 was the resistance coefficient of polymer flooding equal to or greater than water - oil mobility ratio during polymer flooding. Thus the resistance coefficient of the polymer can be used for optimizing parameters and design in the polymer flooding. Using this method can realize the individual design of polymer injection single well and can further improve the oil recovery efficiency in the polymer flooding.