稠油水环发生器结构优化

1. 中国石油大学(华东)储运与建筑工程学院 山东省油气储运安全省级重点实验室· 青岛市环海油气储运技术重点实验室;2. 中国石油管道局工程有限公司

稠油输送;水环发生器;数值模拟;稳定性

Structural optimization of core-annular flow generator for the heavy oil transportation
JIANG Wenming1, DU Shilin2, WU Junqiang1, LIU Yang1, BIAN Jiang1

1. College of Pipeline and Civil Engineering, China University of Petroleum (East China)//Shandong Provincial KeyLaboratory of Oil & Gas Storage and Transportation Safety//Qingdao Key Laboratory of Circle Sea Oil & Gas Storage andTransportation Technology; 2. China Petroleum Pipeline Engineering Co. Ltd.

heavy oil transportation, core-annular flow generator, numerical simulation, stability

备注

水环发生器是水环输送稠油技术的重要装置,为了改善水环稳定性和提高输油效率,对水环输送稠油的减阻机理进行讨论,并采用数值分析的方法对水环发生器结构进行优化。采用VOF(Volume of Fluid)模型建立了水环流动数值模型,并完成了模型验证,研究了水环发生器不同间隙厚度对其稳定性的影响,探讨了水环发生器间隙厚度对水环输油效率的影响,_____得到了水环发生器最佳间隙厚度。结果 表明:间隙厚度存在一个最佳值,过小不利于水环的形成和稳定,过大则会降低输油效率。研究结果为水环输送高黏原油提供了理论指导。(图 10,参[22]

Core-annular flow generator is an important device to transport heavy oil with core-annular flow. In order to improve the stability of core-annular flow while increasing the efficiency of oil transportation, it is crucial to optimize the structure of core-annular flow generator. In this paper, the drag reduction mechanism of the transportation of heavy oil with core-annular flow was analyzed, and the structure optimization of core-annular flow generator was numerically investigated. The simulation was carried out in Volume of Fluid (VOF) model, and a numerical model of core-annular flow was established and verified. The effect on the stability of core-annular flow generator by its clearance thickness was studied, and the influence of the clearance size of core-annular flow generator on the oil transportation efficiency of water-annular flow was discussed. Thus, the optimal clearance thickness of core-annular flow generator was obtained. It is indicated that there is an optimal value of clearance thickness. If the clearance thickness is too small, it is not conductive to the formation and stability of core-annular flow, and if it is too large, the oil transportation efficiency will be reduced. The research results provide the theoretical guidance for the transportation of high viscosity oil with water-annular flow. (10 Figures, 22 References)