一种智能纳米复合剂堵水调剖体系的研究

Study on an intelligent nanocomposite water plugging and profile control system

为解决高温高盐碎屑岩油藏含水率高、封堵难度大以及采收率低等问题,研究了一种ALT智能纳米复合剂堵水调剖体系,通过Zate电位仪和SCZL203全自动张力仪对该调剖体系的粒径和界面张力进行测定,并采用耐高压微观驱替装置进行体系封堵性能评价。结果表明:ALT智能纳米复合剂在水中具有良好的溶解性,可有效改善储层润湿性,且具有很好的洗油效果;同时,复合剂堵水调剖体系颗粒粒径小,容易进入储层微小孔喉,在油藏条件下封堵效果好,具有良好的油水选择性,堵水率高达88.1%,总采收率达56.9%。

In order to solve the problems of high water content,difficulty in plugging and low recovery rate of high temperature and high salt fragmental rock reservoir,an ALT intelligent nano-composite water plugging pro⁃file control system was proposed.The particle size and interfacial tension of the profile control system were mea⁃sured by Zate potentiometer and SCZL203 automatic tensiometer,and the sealing performance of the system was evaluated by using high-pressure micro displacement device.The experimental results showed that the com⁃pound agent had good solubility in water,could effectively improve the reservoir wettability,and had a good oil washing effect.At the same time,ALT intelligent nanocomposite water plugging and profile control system had small particle size,easy to enter the reservoir micro-pore throat,good sealing effect under reservoir conditions,good oil-water selectivity,water plugging rate up to 88.1%,and the total recovery rate of 56.9%.