Abstract:

Condensation point and pour point indicated with temperature, which were conditional indexes, were temperature cut off point at which the physical state of crude oil was shifted. The pour point was viewed as an important parameter to measure the cold flow properties of crude oil and crude oil temperature control in China. In order to in depth understanding of the mechanism of the microstructure of waxy crude oil, it was necessary for the waxy crude oil condensation point/pour point crude oil composition and microstructure to study the relationships. The pour point experiments of six typical waxy crude oils of Daqing were made, and the experimental laws were summarized, and gray system theory directional correlation was used to analyze the influence of wax crystal morphology/structure and composition of crude oil condensation point/pour point. The long-distance transportation of crude oil in the process flow was improved.

Key words: Pour point, Condensation point, Waxy crude oil, Gray system theory, Analysis directed, Wax crystal structure

摘要： 凝点、倾点都是以温度表示的条件性指标,是原油物理状态发生转变的温度分界点。我国一直将凝点视为衡量原油低温流动性及控制原油输送温度的一个重要参数,为了深入认识含蜡原油的微观结构,有必要对含蜡原油凝点/倾点与原油微观结构及组成间的关系进行细致的研究。对大庆6种典型含蜡原油进行凝点实验,总结了实验规律,并用灰色系统理论定向分析了蜡晶形态/结构及原油组成对凝点/倾点的影响规律,为改善原油在长距离输送过程中的流动性提供了依据。

关键词: 凝点, 倾点, 含蜡原油, 灰色系统理论, 定向分析, 蜡晶结构