三元复合驱采出液中羧酸盐表面活性剂检测方法

监测三元试验区采出液中表面活性剂合量变化是了解三元注剂流向和驱油效果的重要指标。羧酸盐是油田常用驱油表面活性剂的一种，通过对三元驱采出液中发酸盐检测方法进行研究，优选建立了2种适合油田现场需要的检测羧酸盐表面活性剂方法，即DDC比色法和分相、分步滴定法。对新的检测方法评价结果表明，该方法准确度高、精密度好、加标回收率好；通过现场检测表明，选用的检测方法所检测结果与现场实际相符，并么分析方法使用仪器易得、操作简便，适合油田矿场应用。

Measurement of the Carboxylate Surfactant in the Produced Fluid in ASP Flooding

Monitoring the content of the surfactant in the produced liquid from EOR test area is an important indication for understanding the direction of injectant and the displacement characteristics . Carboxylate is a kind of the surfactant used generally in oilfield.Through researching into the detecting method of the content of carboxylic acid salt, we set up two kinds of adaptive methods: DDC colorimetry method and parvafacies method. The result of evaluated test demonstrates that the new methods are accurate and have a good oil recovery,and the result of the test in fieldwork demonstrates that these methods accord with the actual condition of fieldwork, and they are easily operated and suitable for the application in oilfield .