聚合物驱影响因素及优选井组注聚方案研究

Study on Influencing Factors of Polymer Flooding and Optimization of Well Group Injection Scheme

针对L油田实施聚合物驱的问题,提出了选择适合井组特点的最优注聚方案的一套方法。首先采用灰色关联法确定影响油层动用的主要参数,然后通过模糊综合评价,基于井组的动态和静态参数对井组进行分类,最后借助数值模拟软件分析待选注聚方案,根据注聚参数的极差选取适合井组类型的最优注聚参数组合。在L油田的4类典型井组试用优选注聚方案,提高了采收率。

Aiming at the problem of polymer flooding in L oilfield,a set of methods is put forward for selecting the optimal polymer flooding scheme suitable for well group characteristics.First,the main parameters affecting reservoir production are determined by grey correlation method;then the well groups are classified based on the dynamic and static parameters of the well groups by means of comprehensive evaluation;finally,the polymer injection plans to be selected are analyzed by means of numerical simulation,according to the extreme difference of polymer injection parameters,the optimal combination of polymer injection parameters suitable for well group type is selected.The optimized polymer injection scheme is tried out in four typical well groups in L oilfield,and the recovery efficiency is improved.