摘要
测量界面张力的方法很多，但最受关注的是旋转滴法。SVT20旋转滴界面张力仪是从德国进口的测量界面张力的一种新型仪器，使用方便，操作简单，但是由于在测量界面张力的过程中影响因素较多，没有得到很好的应用。从转速、液滴体积及光源亮度的选择、气泡的影响和排除等方面，对如何使用SVT20旋转滴界面张力仪准确测量界面张力进行了试验。通过试验得到测量界面张力的转速范围为5000～8000r／min、注入液滴的体积为0．3～0．8μL，时测量结果准确。理论上界面张力越低的驱油剂其驱油效果应该越好，在室内对一些表面活性剂进行了界面张力测量，并做了相应的岩心驱替试验，试验结果与理论相吻合。
Surfactant flooding is very important to enhance oil recovery in the late stage of oilfield development. Appropriate surfactants should be chosen according to the magnitude of interracial tension. There are a lot of methods for measuring interracial tension, the close attention was paid to spinning drop method. SVT20 spinning drop video tensiometer,a new type of instrument imported from Germany can he used easily and operated simply. The application was not good due to many factors impacting the measurement of interracial tension. The experiment using SVT20 spinning drop video tensiometer for accurate measurement were conducted with consideration of the following prospect, the rotary speed, droplet size, the light source, effect of bubbles, and its elimination, etc. The best rotary speeds ranged from 5 000 to 8 000 rpm,and the injected droplet size ranged from 0.3 to 0.8μl. Theoretically, the lower the interracial tension of driving agent,the better the oil displacement effect. The interracial tensions of some surfactants were measure in laboratory,the corresponding core displacement experiments were conducted and the experiment results agree with theoretical analysis.
出处
《石油钻探技术》
CAS
北大核心
2011年第1期115-118,共4页
Petroleum Drilling Techniques
关键词
表面张力
旋转液滴界面张力测定仪
提高采收率
测量原理
影响因素
surface tension
spinning drop video tensiometer ； enhanced ple
influence factor recovery ；measuring princi
