静态激光粒度仪测试调剖用聚合物微球粒径的研究

Particle Size Determination of Polymer Micro Spheres Used in Profile Control by Static Laser Particle Size Analyzer

杜美美 伟娜 赵董艳 赵淑华 刘丽敏 崔维红 徐超慧 罗斯力

DU Meimei WEI Na ZHAO Dongyan ZHAO Shuhua LIU Limin CUIWeihong XU Chaohui LUO Sili

建立了使用静态激光粒度仪测试油田调剖用聚合物微球粒径的方法，在分散剂的筛选、样品加样方式、搅拌速度、搅拌时间几个方面对样品前处理方法进行了优化。优化分散条件为：在搅拌中的50 g 石油醚分散剂中滴加1 滴样品、搅拌速度400 r/min、搅拌时间1 min。该方法重复性好，相对标准偏差为0.0591%。使用LA-950S型激光粒度仪，按体积和个数基准测得的微球粒径中值分别为1.8592 μm和308.79 nm，因此要根据评价目标来决定选取何种评价方法。图3 表4 参9

The determination method of polymer micro sphere’s particle size used in profile control by laser particle size analyzer was established. The sample preparation method was optimized in several aspects，such as dispersant，loading mode，stirring speed and stirring time. The optimum dispersing condition was obtained as follows: one drop of sample was added in 50 g petroleum ether with stirring speed of 400 r/min and stirring time of 1 min. This method had good reproducibility with the relative standard deviation of 0.0591%. Using LA-950S laser particle size analyzer under the optimum condition，the particle size of micro sphere was 1.8592 μm by volume base and 308.79 nm by number base. Therefore，the evaluation method should be chosen according to the objective.