原油管道蜡沉积物径向性质研究进展

蜡沉积物性质对原油管道清管方案的制定有重要影响，是原油流动保障领域的研究热点之一。本文回顾了近年来关于管道蜡沉积物径向特性的研究成果，对当前实验研究手段和方法进行了系统的对比分析；从蜡沉积物组成、析蜡特性、宏观形态与微观结构、力学特性四个方面深入阐述了对管道蜡沉积物径向性质的认识与结论，分析了其内在影响因素和作用机理；评述了蜡分子扩散系数及径向含蜡量分布预测模型的理论基础和存在缺陷；提出了未来的研究方向：加快研发更加精确的机械取样装置，深入研究沉积物微观结构特性对宏观流变性的影响机理并建立二者之间的定量关系，建立考虑多孔网状结构中蜡分子扩散动力学的蜡沉积物径向性质预测模型。

Research progress on radial properties of wax deposits in crude oil pipelines

The properties of wax deposits significantly impact crude oil pipeline pigging operation, and this topic has become a hotspot in flow assurance research. This paper reviews the recent research progress on the radial properties of wax deposits in crude oil pipelines and compares the advantages and disadvantages of the current experimental methods. The understanding and conclusions of the radial properties of wax deposits were expounded from four aspects: composition, wax precipitation characteristics, macroscopic appearance and microstructure, as well as mechanical properties. Meanwhile, the intrinsic influencing factors and acting mechanism were analyzed. The theoretical foundations and shortcomings of wax molecular diffusion coefficient and radial wax content distribution models were evaluated. Finally, the future research directions were presented: mechanical sampling device with higher accuracy needs to be developed, the influencing mechanism and quantitative relation between the macroscopic rheological properties of wax deposits and their microstructure characteristics need to be revealed, and predictive models of radial properties of wax deposits considering the diffusion kinetics of wax molecules in the porous media need to be established.