中心过轴式油水分离水力旋流器性能分析  

Performance Analysis of Central-Axial Hydrocyclone for Oil-Water Separation

作　　者：李巍巍 邢雷[1,3,4] 蔡萌 蒋明虎[1,3] 马志权[2] 郭炳乾 关帅 Li Weiwei;Xing Lei;Cai Meng;Jiang Minghu;Ma Zhiquan;Guo Bingqian;Guan Shuai(School of Mechanical Science and Engineering,Northeast Petroleum University;Daqing Oilfield Production Technology Institute;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multi-phase Media Treatment and Pollution Prevention;Daqing Oilfield Postdoctoral Research Workstation)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江省大庆市163318 [2]大庆油田有限责任公司采油工艺研究院 [3]黑龙江省石油石化多相介质处理及污染防治重点实验室 [4]大庆油田博士后科研工作站

出　　处：《石油机械》2025年第4期64-70,共7页China Petroleum Machinery

基　　金：国家自然科学基金青年科学基金项目“旋转流场内离散油滴聚结破碎机理及运移动力学行为研究”(52304064);国家自然科学基金区域创新发展联合基金重点支持项目“同井注采井筒关键湍流场域离散相运聚机理及动力学行为研究”(U21A20104)。

摘　　要：同井注采技术在井下对高含水采出液进行油水分离,而水力旋流器是同井注采技术高效运行的关键设备。为进一步提高井下油水分离水力旋流器的分离性能,结合旋流分离原理与3D打印技术,提出了中心过轴式油水分离水力旋流器。通过数值模拟方法结合试验研究,系统地对不同操作参数下旋流器内的流场分布特性和油水分离效率进行了分析,包括不同油滴粒径、入口速度及分流比。研究结果表明:当含油体积分数为4%,油滴粒径为0.7 mm,入口进液速度为6.33 m/s,分流比为30%时,旋流器的分离效率达到最大。在上述工况下,旋流器模拟与试验的分离效率分别达到98.8%和98.0%。数值模拟与试验在油核位置和分离效率方面呈现出良好的一致性,验证了中心过轴式油水分离水力旋流器结构的可行性。研究结果可为井下油水高效分离设备的研发及应用提供一定参考。The single-well injection and production technology separates oil and water from high water-cut produced fluid in the wellbore,and the hydrocyclone is a key equipment for the efficient operation of this technology.To further improve the downhole oil-water separation performance of hydrocyclone,by combining cyclone separation principle and 3D printing technology,a central-axial hydrocyclone for oil-water separation was proposed.With the help of numerical simulation,together with experiment,the flow field distribution inside the cyclone and the oil-water separation efficiency under different operating parameters(incl.oil droplet size,inlet flow rate,and split ratio)were systematically analyzed.The results show that the maximum separation efficiency of the cyclone is realized when the oil volume fraction is 4%,the oil droplet size is 0.7 mm,the inlet flow rate is 6.33 m/s,and the split ratio is 30%.Under these operating conditions,the simulated and experimental separation efficiencies reach 98.8%and 98.0%,respectively.The numerical simulation and experiment yield consistent results in respect of oil nucleus position and separation efficiency,verifying the feasibility of the proposed central-axial hydrocyclone.The study results provide a reference for the development and application of efficient downhole oil-water separation equipment.

关 键 词：油水分离 旋流器 油滴粒径 入口速度 分流比 分离性能 

分 类 号：TE934[石油与天然气工程—石油机械设备]