摘要
中国大部分油田含水率逐年上升,井下油水分离及同井注采技术的应用可实现油水在井下原位分离,提升高含水油井的开采效益。为进一步提升井下油水分离效果,利用小直径旋流器的高效性,设计一种由多级小型油水旋流器并联的井下油水分离装置。结合数值模拟与响应面分析法对小型油水旋流器的螺旋段和分离段进行优化研究,构建小型油水旋流器结构参数与分离效率及压力损失间的数学关系模型。获得最优结构参数的配置形式为:螺旋头数为3头,螺旋螺距为22.94 mm,螺旋圈数为0.87圈,溢流管直径、底流管直径和底流管长度分别为4.73、8.5、25 mm。优化后井下小型油水旋流器分离效率可达95.32%,提升了5.28%。利用PIV(粒子图像测速)技术对井下小型旋流器进行流场测试及分析,验证模拟的准确性。该结构可为井下油水分离技术在分离性能提升方面提供新的设计思路,有助于促进该技术的进一步应用。
The water content of most oil fields in China is increasing year by year.The application of underground oil-water separation and the same well injection and production technology can realize the underground oil-water separation in-situ,and improve the exploitation efficiency of high water content oil wells.To further enhance the downhole oil-water separation effect,the high efficiency of mini hydrocyclone was utilized to design a underground high-efficiency oil-water separation device consisting of multi-stage small oil-water cyclones connected in parallel.A mathematical relationship model between the structural parameters,separation efficiency and pressure loss of a small oil-water cyclone was constructed by combining numerical simulation and response surface analysis to optimize the spiral and separation sections of the cyclone.The configuration form of the optimal structural parameters is obtained:the number of helical heads is 3,the helical pitch is 22.94 mm,the number of spiral rings is 0.87,the overflow tube diameter,the underflow tube diameter and the underflow tube length are 4.73,8.5,25 mm,respectively.After optimization,the separation efficiency of the downhole small oil-water cyclone can reach 95.32%,an increase of 5.28%.The flow field of small downhole cyclone was tested and analyzed using PIV(particle image velocimetry)technology,verifying the accuracy of the simulation.This structure can provide new design ideas for improving the separation performance of downhole oil-water separation technology,which will help promote the further application of this technology.
作者
郭昭阳
赵军伟
赵立新
刘琳
鲁辉
王亚红
蒋明虎
GUO Zhaoyang;ZHAO Junwei;ZHAO Lixin;LIU Lin;LU Hui;WANG Yahong;JIANG Minghu(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang Province,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,Heilongjiang Province,China;China Oilfield Services Limited,Tianjin 300459,China;State Key Laboratory of Continental Shale Oil,Daqing 163318,Heilongjiang Province,China)
出处
《化学工程》
北大核心
2025年第12期78-83,共6页
Chemical Engineering(China)
基金
国家自然科学基金区域创新发展联合基金重点支持项目(U21A20104)
国家留学基金委公派博士后项目(202408230140)
东北石油大学“国家基金”培育基金项目(2023-GPL-10)
东北石油大学人才引进科研启动经费资助项目(2022KQ13)
大庆市指导性科技计划项目(zd-2023-34)。
关键词
井下
小型油水旋流器
响应面优化
数值模拟
PIV流场测试
downhole
mini oil-water hydrocyclone
response surface optimization
numerical simulation
PIV flow field test
