大庆油田聚合物驱分注措施效果分析

Effect analysis of separate layer injection during polymer flooding

分注措施效果的确定是聚合物驱开发指标预测的重要内容。针对目前确定分注效果的方法较少,指标预测过程中操作难度较大的问题,数值模拟了不同含水阶段实施分注对最终采收率的影响,并定量计算了分注过程中低渗透层最佳溶液注入量比例;系统分析了大庆油田聚合物驱分层注聚实施效果,得到了分注对综合含水和提高采收率的影响特征,为聚合物驱油田开发规划中措施效果的预测提供了依据。

Confirming the effect of separate layer injection is an important content of polymer flooding development prediction. Aiming at the problems of less methods of confirming the effect of separate layer injection and the big difficulty in process of index prediction, the numerical simulation method is used to calculate the impact of separate layer injection on the ultimate recovery during the different water cut stages, and the best proportion of solution injection rate is calculated in low permeability layers. The effect of layered polymer flooding in Daqing oilfield is systematically analyzed, and the influence of separate layer injection on comprehensive water cut and enhanced oil recovery is obtained, which provides a basis for predicting the effect of polymer flooding in crude oil development planning.