高含水期非均质油藏周期注水室内实验研究

Experimental study on the cyclic water flooding of heterogeneous reservoir in a high water cut stage

通过室内物理模拟实验,研究周期注水影响因素及对采收率的影响。根据渗透率极差相似原则,结合非均质油藏特点,设计出模型并进行实验研究。实验结果表明,2组周期注水方案的驱油效率在水驱基础上分别提高3.67%和2.94%。周期注水有效地改善了非均质砂岩油藏的开发效果,提高了注水开发效率,为油田开发技术决策、目标采收率研究等提供实验依据。

This paper studies the influencing factors of cyclic water flooding and its influence on the recovery rate through indoor physical simulation experiment. According to the similarity principle of permeability ratio and geological characteristics of heterogeneous sandstone oil field, the model was designed, and the experiment of cyclic water injection and conventional water injection flooding was carried out. The experimental results show that the oil displacement efficiency of these two sets of cyclic water injection scheme was improved respectively by 3.67% and 2.94% on the basis of water drive. The development effect of the heterogeneous sandstone reservoir is effectively improved by the cyclic water injection, and the efficiency of water injection development is improved, providing an experimental basis for decision-making and target recovery of oil field development.