新型螺旋式气液旋流分离器数值模拟研究  

Numerical Simulation Study on a New Spiral Gas-Liquid Cyclone Separator

作　　者：魏松波[1] 刘琳 郑兴升 王新忠[1] 鲁晓华 季豪 赵立新[2,3] Wei Songbo;Liu Lin;Zheng Xingsheng;Wang Xinzhong;Lu Xiaohua;Ji Hao;Zhao Lixin(PetroChina Research Institute of Petroleum Exploration&Development;School of Mechanical Science and Engineering of Northeast Petroleum University;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multi-phase Media Treatment and Pollution Prevention;Sulige Project Management Department of CNPC Chuanqing Drilling Engineering Company Limited)

机构地区：[1]中国石油勘探开发研究院 [2]东北石油大学机械科学与工程学院 [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]川庆钻探工程有限公司苏里格项目经理部

出　　处：《石油机械》2024年第8期132-140,共9页China Petroleum Machinery

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“同井注采井筒湍流场域离散相运聚机理及动力学行为研究”(U21A20104);中国石油集团油田技术服务有限公司科学研究与技术开发项目“威远、苏里格老井提产复产关键技术研究”(2022T-003-001);中国石油天然气股份有限公司科技项目“低渗透油藏分层注气高效注采关键技术与新装备”(2023ZZ0903)。

摘　　要：为研究气液旋流分离器的气液分离性能,解决油气产出液中潜在高含气导致泵气锁的问题。基于旋流分离理论,设计了一种新型螺旋气液分离器。在不同气液比条件下对其内部流场进行研究。研究结果表明:随着分流比的增加,旋流器的内壁面和底流口附近的含气体积分数显著降低,同时旋流器溢流压力损失逐渐增大,而底流压力损失逐渐减小,溢流压力损失增加的速率与底流压力损失减小的速率基本相同;分流比的增加使气液分离器的除气效率逐渐提高,底流含气体积分数逐渐减小。综合分析气液比分别为1∶1、1∶2、1∶5以及1∶8的4种工况,得出了其最佳溢流分流比分别为58%、39%、22%以及15%。研究结果可为高含气油井的井下气液分离装置设计提供依据,同时可为现场应用及操作提供指导。In order to study the gas-liquid separation performance of gas-liquid cyclone separators and solve the problem of pump gas lock caused by potential high gas content in produced oil and gas fluid,a new type of spiral gas-liquid separator was designed based on the cyclone separation theory,and the internal flow field was studied under different gas-liquid ratios.The study results show that as the diversion ratio increases,the gas concentration near the inner wall and underflow outlet of the cyclone significantly decreases,the overflow pressure loss of the cyclone gradually increases,while the underflow pressure loss gradually decreases,and the rate of increase in overflow pressure loss is basically the same as the rate of decrease in underflow pressure loss.The increase in the diversion ratio gradually improves the degassing efficiency of the gas-liquid separator,and the gas volume fraction of underflow gradually decreases.Under working conditions of 1∶1,1∶2,1∶5 and 1∶8 gas-liquid ratios,the optimal overflow diversion ratios are 58%,39%,22% and 15% respectively.The study results provide a basis for the design of downhole gas-liquid separation devices for high gas content oil wells,and also provide guidance for field applications and operations.

关 键 词：井下气液分离器 气液比 数值模拟 分离效率 溢流分流比 

分 类 号：TE93[石油与天然气工程—石油机械设备]