精细石油化工

针对常规油基聚合物微球调驱体系在渤海油田部分区块注入性不佳等问题，采用分散聚合法，将丙烯酰胺、甲基丙烯酰氧乙基三甲基氯化铵和丙烯酸在引发剂作用下聚合，制备了三元共聚水基聚合物微球。性能评价结果表明：三元共聚水基聚合物微球粒径分布均匀，中值粒径619 nm，具备良好的分散性、注入性和封堵性。在渗透率1 000×10^-3μm²条件下3 000 mg/L微球溶液阻力系数为2.14，残余阻力系数不22.6；可有效封堵储层深部喉道，使得喉道半径降低46.9%;3 000 mg/L三元共聚水基聚合物微球体系在渗透率为2 000×10^-3μm²时，最终采收率为82.1%，优于渗透率为3 000×10^-3μm²时的采收率76.0%。

In response to the problems of poor injectability in some blocks of conventional oil-based polymer microsphere displacement control systems, ternary copolymerized water-based polymer microspheres were prepared by water dispersion polymerization and their performance was evaluated. The results showed that the particle size distribution of the ternary copolymerized water-based polymer microspheres was uniform, with a median particle size of 619 nm, and had good dispersibility, injectability, and plugging properties. Under the condition of a permeability of 1 000×10^-3 μm², the resistance coefficient of the 3.0 mg/g microsphere solution was 2.14, and the residual resistance coefficient was 22.6. It can effectively plug the deep throat of the reservoir, reducing the throat radius by 46.9%. The final recovery rate of the 3.0 mg/g ternary copolymerized water-based polymer microsphere system is 82.1% at a permeability of 2 000×10^-3 μm², which is better than the recovery rate of 76.0% at a permeability of 3 000×10^-3 μm².