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基于新型Couette结蜡装置的长庆原油结蜡特性及模型建立
李传宪,姬中元,杨飞,蔡金洋,陈赫,李琛,史培玉
0
(中国石油大学储运与建筑工程学院, 山东青岛 266580;山东省油气储运安全省级重点实验室, 山东青岛 266580;中国石化天然气分公司华北天然气销售营业部, 山东青岛 266400;西安长庆科技工程有限责任公司北京分公司, 北京 100088;中国石化胜利油田分公司油气集输总厂,山东东营 257000)
摘要:
利用自行研发的Couette结蜡装置考察壁面油温、油壁温差、壁面剪切等因素对长庆原油蜡沉积速率的影响;通过FLUENT软件模拟结蜡装置内部的流场及温度场,得到结蜡筒壁面处黏度、温度梯度、剪切应力等参数,建立适合长庆原油的蜡沉积模型。结果表明:不同油温、油壁温差、样品筒转速条件下,主导长庆原油蜡沉积速率的内在因素依次为壁面处的蜡晶溶解度系数、壁面处的温度梯度和壁面处的剪切应力;数值模拟结果与实际管线的流场、温度场分布规律相吻合;模型计算值与试验测量值的平均误差为6.47%。试验结果较好地反映了长庆原油的蜡沉积特性,验证了装置的可靠性、算法的可行性和研究方法的可推广性。
关键词:  长庆原油  蜡沉积  Couette结蜡装置  FLUENT模拟  数学模型
DOI:10.3969/j.issn.1673-5005.2016.06.017
投稿时间:2015-11-06
基金项目:国家自然科学基金项目(51204202);中央高校基本科研业务费专项(14CX02210A, 14CX06141A, 15CX06072A); 山东省青少年教育科学规划课题 (16BSH042)
Study on wax deposition of Changqing crude oil based on a newly developed Couette device
LI Chuanxian,JI Zhongyuan,YANG Fei,CAI Jinyang,CHEN He,LI Chen,SHI Peiyu
(College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580, China;Shandong Province Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao 266580, China;Huabei Sales Department, SINOPEC Gas Company, Qingdao 266400, China;Beijing Branch of Xi 'an Changqing Technology Engineering Company Limited, Beijing 100088, China;Oil and Gas Gathering Central Plant, SINOPEC Shengli Oilfield Company, Dongying 257000, China)
Abstract:
In this paper, a systematic research on the law of wax deposition for Changqing crude oil under various experimental conditions was carried out in an small Couette wax deposition device independently developed. FLUENT software was applied to simulate the flow and temperature field of crude oil inside this new device to obtain the precise parameter values such as viscosity,temperature gradient,shear stress and so on. The results show that wax crystal solubility coefficient, temperature gradient and sheer stress at the wall plays a major role in the internal mechanism under different operating conditions, respectively. The simulation result agrees well with the distribution of the flow and temperature field in actual pipelines. The dynamic model of wax deposition for Changqing crude oil was established with an average error of 6.47%. Thus the feasibility of this new method was confirmed and could be used for the further research on wax deposition.
Key words:  Changqing crude oil  wax deposition  Couette wax deposition device  FLUENT simulation  mathematical model
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