特高含水期微观剩余油分布状态及驱油效率表征研究

Characterization of Microscopic Remaining Oil Distribution and Oil Displacement Efficiency in Ultra-high Water Cut Period

提高驱油效率是油田关注的焦点问题,为高效开发特高含水期剩余油,文章分析了剩余油的形成机理和分布状态,以简化毛管束模型为例,对油滴运动进行受力分析,得出微观驱油效率定量表征,分别从优化注采方式和调整驱替参数两个方面提出开发对策,为特高含水期剩余油分布研究、提高驱油效率提供理论依据和指导。

Improving oil displacement efficiency is the focus of oilfield concern.To efficiently develop the remaining oil in the ultra-high water cut period,this study analyzed the formation mechanism and distribution state of the remaining oil.Taking the capillary bundle model as an example,the force analysis of the oil droplet movement was carried out,and the quantitative characterization of the microscopic oil displacement efficiency was obtained.The development countermeasures were put forward respectively from two aspects of optimizing injection and production mode and adjusting displacement parameters,which was the research on the distribution of remaining oil in the ultra-high water cut period.The study provides both theoretical basis and guidance for improving oil displacement efficiency.