高蜡原油低温初始蜡沉积特性实验与模拟研究OA

In order to explore the wax deposition characteristics and mechanism of high waxy crude oil under low wall temperature conditions,this paper detailly investigated the initial wax deposition char-acteristics of high-waxy Changqing crude oil based on the self-developed Couette wax deposition exper-imental device.It is found that the initial gelation process is extremely fast compared to the traditional wax deposition process dominanted by the molecular diffusion mechanism.Moreover,the formed wax deposition has a homogeneous structure and its composition was consistent with the bulk oil.The ge-lation deposition process was analyzed from the aspect of heat transfer and crude oil gelation.A waxy crude oil gelation deposition model coupled with heat transfer and gelation mechanism was estab-lished.The accuracy of the model was verified through experiments(lower than 6.6%).This work will help further the understanding of wax deposition and improve the prediction accuracy of wax dep-osition.