井下微型气液旋流分离器优化设计与性能分析  

Optimal design and performance analysis of downhole micro gas-liquid hydrocyclone

作　　者：邢雷[1,2,3] 苗春雨 蒋明虎 赵立新[1,3] 李新亚 XING Lei;MIAO Chunyu;JIANG Minghu;ZHAO Lixin;LI Xinya(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Postdoctoral Research Workstation in Daqing Oilfield,Daqing 163318,Heilongjiang,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]大庆油田博士后科研工作站,黑龙江大庆163318 [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,黑龙江大庆163318

出　　处：《化工学报》2023年第8期3394-3406,共13页CIESC Journal

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);国家自然科学基金项目(52304064);中国博士后科学基金项目(2023M730481);黑龙江省自然科学基金项目(LH2022E017);提高油气采收率教育部重点实验室开放课题(NEPU-EOR-2021-004);大庆市指导性科技计划项目(ZD-2021-38)。

摘　　要：针对采油井筒内产出液含气对油田同井注采开发模式的不利影响,基于旋流分离原理提出一种井下微型气液旋流分离器结构。借助Plackett-Burman设计、最陡爬坡设计与响应曲面设计结合计算流体动力学方法,对井下微型气液旋流分离器结构参数进行显著分析及优化设计,构建了显著性结构参数与分离效率间的二次多项式数学关系。系统分析了入口进液量、分流比及气相体积分数对气液分离性能的影响规律。构建室内微型气液旋流分离性能测试系统,对数值模拟结果的准确性及优化结果的高效性进行了验证性试验。试验结果表明优化后的微型气液旋流分离器结构可使液相效率由优化前的84.10%提高到87.22%。获得了微型气液旋流分离器最佳溢流分流比为6%,最佳入口流量为13.77 L/h,最适用的气相体积分数为5.5%,最佳工况下气液平均分离效率为99.66%。为了指导分离器在不同含气量条件下的最佳运行参数调控,构建了气相体积分数及溢流分流比与分离效率间的数学关系模型,获得了不同气相体积分数条件下的最佳分流比。In view of the adverse influence of the produced fluid gas-containing in the single-well injection-production system,an innovative downhole micro gas-liquid hydrocyclone is proposed based on the principle of cyclone separation.Based on Plackett-Burman(PB)design,steepest climbing design and response surface methodology combined with computational fluid dynamics,the significant structural parameters of the downhole micro gas-liquid hydrocyclone are analyzed and optimized,and the quadratic polynomial mathematical relationship between structural parameters and separation efficiency is constructed.The effects of inlet flow rate,overflow split ratio and volume fraction of gas on the performance of downhole micro gas-liquid hydrocyclone are analyzed systematically.The experimental process of gas-liquid hydrocyclone separation performance is constructed to experimentally verify the accuracy of numerical simulation results and the high efficiency of the optimization structure.The experimental results show that the optimized structure of downhole micro gas-liquid hydrocyclone can improve the de-watering efficiency from 84.10%to 87.22%.The optimal overflow split ratio of the micro-gas-liquid cyclone separator is 6%,the optimal inlet flow rate is 13.77 L/h,the most suitable gas phase volume fraction is 5.5%,and the average gas-liquid separation efficiency under the optimal working condition is 99.66%.The mathematical relationship between volume fraction of gas,overflow split ratio and separation efficiency is constructed to guide the optimal operation parameter regulation of the hydrocyclone under the conditions of different gas content,and the corresponding optimal split ratio under different gas volume fraction is obtained quantitatively.

关 键 词：计算流体力学 气液两相流 数值模拟 气液分离 旋流分离器 结构优化 分离效率 

分 类 号：TQ051.8[化学工程]