三元复合驱采出液中防垢剂浓度的检测方法与应用

Detection Method and Application of Scale Inhibitor Concentration in ASP Produced Fluid

黄小会 王庆国 刘明君 刘纪琼 康 燕

HUANG Xiaohui WANG Qingguo LIU Mingjun LIU Jiqiong KANG Yan

针对目前三元复合驱油井采出液防垢剂浓度的检测方法尚属空白，采用了电感耦合等离子体发射仪（ICP）测定法，分析了三元采出液中聚合物、表面活性剂、碱以及硅离子对防垢剂浓度测定的影响。研究结果表明，聚合物对防垢剂浓度检测影响最大，表面活性剂、碱和硅离子对防垢剂浓度检测影响较小，平均精度偏差最高仅为2.6%。为消除聚合物的影响，采用氧化降解预处理方式，使检测平均精度偏差由 38.9%降为0.2%。使用 ICP 法对大庆油田某三元复合驱试验区块30口油井进行了防垢剂浓度检测现场试验，药剂方案符合率由检测前的80%

The detection method of scale inhibitor concentration in the produced fluid of ASP flooding oil well is still blank. In the paper，the determination method of inductively coupled plasma emission （ICP） was studied，and the effects of polymer， surfactant，alkali and silicon ions in ASP produced fluid on the determination of scale inhibitor concentration were analyzed. The results showed that polymer had the greatest influence on the concentration detection of scale inhibitor，surfactant，alkali and silicon ions had little influence on the concentration detection of scale inhibitor，and the highest average accuracy deviation was only 2.6%. In order to eliminate the influence of polymer，oxidative degradation pretreatment was used，as a result，the average accuracy deviation was reduced from 38.9% to 0.2%.The field test of scale inhibitor concentration detection was carried out in 30 oil wells in a ASP flooding test block of Daqing oilfield by ICP method. The coincidence rate of reagent scheme was increased from 80% before detection to 96%，and the pump-testing period was increased from 210 days to 270 days.

10.19346/j.cnki.1000-4092.2022.03.026