实验室内原油电脱水应注意的问题

从油田或管道中取出的油样具有很高的含水率，在进行实验室原油物性和流变性实验时还需脱水。研究证明，最经济，有效的脱水方法是电脱水法，但在采用该方法时，应根据原油性质，对不同的原油采用不同的加热温度，脱水时间，以脱水效果好，不发迹原油性质为原则。

Points for Attention in Electric Dehydration of Crude Oil during Laboratory Test.

Oil sample taken from oilfield or pipeline has a high water cut,so,dehydration is of necessity when the test is carried out on a physical and rheological behavior of oil sample in laboratory. The research showed that the most cost-effective dehydration method is the electric dehydration method, therefore, on the principle of getting a better dewatering result without altering oil characteristics, heating temperatures and dewa-tering intervals should be applied separately to different oil samples based on the oil characteristics when adopting this method,at the same time,the dehydrator's cover should be designed with a hemicycle with groove so as to make the water droplet condensed on the cover flow into the groove instead of the oil,and the volume of oil sample to be tested should be 3/4 of the internal volume of dehydrator. The physical and rheological behavior of the dewatered oil sample can be determined only after it has to be placed for 48 hours at room temperature in order to reflect ite true behavior.