倒锥注气强化井下油水分离水力旋流器性能研究  

Research on performance of downhole oil-water separation hydrocyclone enhanced by inverted cone gas injection

作　　者：李新亚 邢雷[1,2] 蒋明虎 赵立新[1,2] LI Xinya;XING Lei;JIANG Minghu;ZHAO Lixin(School of Mechanical Science and Engineering,Northeast Petroleum University,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]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3期1134-1144,F0003,共12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);黑龙江省自然科学基金项目(LH2022E017);黑龙江省自然科学基金(重点)项目(ZD2020E001);大庆市指导性科技计划项目(ZD-2021-38);提高油气采收率教育部重点实验室开放课题项目(NEPUEOR-2021-004)。

摘　　要：为了进一步提高井下油水分离水力旋流器的分离性能,提出一种倒锥注气式井下油水分离水力旋流器结构,开展倒锥注气对油水分离性能影响研究。利用数值模拟和实验研究相结合的方法,对不同注气量、含油浓度、分流比、入口流量等操作参数下的流场分布特性和油水分离效率进行分析。结果表明,随着注气量的增加,分离效率呈现先升高后降低的趋势,当注气量为2.034m^(3)/d时,分离效率达到最大值98.52%;当水力旋流器的入口含油浓度为0.75%、分流比为40%、入口流量为5.4m³/h时,可获得水力旋流器的最佳分离效率为99.51%,较注气前提高了1.11%。针对注气后的井下油水分离水力旋流器开展室内分离性能实验研究,数值模拟和实验结果呈现相同的变化趋势,验证了倒锥注气强化分离性能的可行性及数值模拟结果的准确性。In order to further improve the separation performance of downhole oil-water separation hydrocyclone,a structure of downhole oil-water separation hydrocyclone with inverted cone gas injection was proposed,and the influence of inverted cone gas injection on oil-water separation performance was studied.The distribution characteristics of flow field and oil-water separation efficiency of hydrocyclone under different gas injection rates,oil volume fractions,split ratios and inlet flow rates are analyzed via numerical simulation and experimental method.The results show that with the increase of gas injection rate,the separation efficiency increases at first and then decreases.When the gas injection rate is 2.034 m^(3)/d,the separation efficiency reaches the maximum value 98.52%.When the inlet oil volume fraction of the hydrocyclone is 0.75%,the split ratio is 40%,and the inlet flow rate is 5.4 m^(3)/h,the optimal separation efficiency of the hydrocyclone is 99.51%,which is 1.11%higher than that without gas injection.The separation performance experiments of downhole oil-water separation hydrocyclone are carried out.The numerical simulation results are in good agreement with the experimental results.The feasibility of improving separation performance of hydrocyclone by inverted cone gas injection and the accuracy of numerical simulation results are verified.

关 键 词：水力旋流器 分离强化 流场分析 数值模拟 分离性能 多相流 

分 类 号：TQ051.8[化学工程]