本文以新疆各油区十种有代表性的单井及由其组成的混合原油为例，对原油凝点随放置时间的变化规律进行了研究。实验结果表明：大部分新疆单井原油和混合原油凝点在整个实验期间内基本保持不变。个别油样随放置时间的延长，凝点上升，一般在配制后的最初阶段上升较快，经过一定时间后，凝点基本保持不变。有的混合原油凝点的上升远远超出了其组份原油的影响，这可能是蜡、胶、沥青质间的交互作用所致。此外，还发现新疆原油存在分层现象 In this paper, ten representative single wells in each oil region of Xinjiang and their mixed crude oil are taken as an example to study the variation law of pour point of crude oil with the setting time. The experimental results show that most of Xinjiang single-well crude oil and mixed crude oil freezing point remain basically unchanged throughout the experimental period. With the extension of the individual oil samples, the freezing point increases, generally in the initial stage after the preparation rose rapidly, after a certain period of time, the freezing point remained unchanged. Some mixed crude oil rose point far beyond the impact of its component crude oil, which may be due to the interaction between wax, glue, asphaltene. In addition, Xinjiang also found that there is stratification of crude oil