测定油田注入水中颗粒直径中值的影响因素分析

Influential Factor of Particle Median Diameter Determination in Oilfield Injected Water

杜美美 伟娜 赵紫印 赵董艳 宾枚 林涛

DU Meimei WEI Na ZHAO Ziyin ZHAO Dongyan BIN Mei LIN Tao

为提高注入水中颗粒直径中值测定结果的准确性，从取样方法、温度和压力、细菌、颗粒团聚、搅拌速度、水样浓度和含油量几个方面讨论了影响油田注入水中颗粒直径测量的因素，分析了仪器计量基准对粒径测试结果的影响。结果表明：曝氧、温度、压力和颗粒团聚使颗粒直径中值测值随放置时间的延长而增大，细菌的影响基本可以忽略，搅拌速度、水样浓度和含油量会使测试结果出现偏差；避氧操作、加入EDTA金属络合剂可以提高水质稳定性；用激光粒度仪测试时需确立适宜的搅拌速度和水样浓度，缩短放置时间并排除含油量的影响。在测量过程中，应综合考虑颗粒体积和个数的影响，设置合理的评价基准。图6 参12

In order to enhance the accuracy of the detection of particle median diameter in oilfield injected water，the effect of several aspects on the measurement was discussed，such as sampling method，temperature and pressure，bacteria，agglomeration， stirring speed，concentration and oil content. The effect of standard of instrument measurement was also taken into consideration. The results showed that the exposure of oxygen，temperature，pressure and agglomeration would amplify the test result with th extension of storage time，while the influence of bacteria could be ignored，and stirring speed，concentration and oil content would cause the test result to appear deviation. Isolation of oxygen and adding EDTA could improve the stability of water. An appropriate stirring speed and water concentration should be established and the storage time should be decreased to exclude the effect of oil when using laser particle size analyzer. During the measurement，it should consider the effect of particle volume and number，and establish a reasonable evaluation benchmark.

10.19346/j.cnki.1000-4092.2016.06.034