滑溜水压裂液减阻剂减阻性能评价综合性实验设计

Comprehensive experimental design on evaluating drag reduction performance of slickwater fracturing fluid drag reduction agent

滑溜水压裂液的减阻性能是滑溜水压裂液的研究重点。利用自主研发的压裂液摩阻测定仪研究了不同加量、排量及实验温度对滑溜水压裂液用减阻剂减阻性能的影响规律,进而对其减阻机理进行研究。实验结果表明:同一排量下,减阻率随着减阻剂浓度的增加而增加,当浓度增加到一定范围时,减阻率基本保持不变,最优的减阻剂浓度添加范围为0.15wt%~0.20wt%;在同一加量下,减阻率随着排量的增大先增大后减小,存在的最优排量为35 L/min;在同一排量下,减阻率随着温度的升高而减小,在25℃时,减阻率最高。该实验有助于学生了解滑溜水压裂液的减阻机理和流体的流动规律,激发学生的实验热情,提高学生动手实操能力和思维转换能力。

The drag reduction performance of slickwater fracturing fluid is the focus of research. The influence law of different concentration, displacement and experimental temperature on the drag reduction performance of slickwater fracturing fluid are studied by using the self-developed fracture fluid friction resistance tester, and then the drag reduction mechanism is studied. Experimental result shows that at the same displacement, the drag reduction rate increases with the increase of the concentration of drag reducer. When the concentration increases to a certain range, the drag reduction rate basically remains unchanged. The optimal concentration addition range of drag reducer in this experiment is 0.15 wt% to 0.20 wt%. At the same concentration, the drag reduction rate increases first and then decreases with the increase of displacement, and the optimal displacement is 35 L/min. At the same displacement, drag reduction decreases with increasing temperature, with the highest drag reduction at 25 ℃. This experiment is helpful for students to understand the drag reduction mechanism of slickwater fracturing fluid and the flow law of fluid, stimulate their experimental enthusiasm, and improve their practical operation ability and thinking transformation ability.