高含气井低速叶轮动态气液分离设备参数优化  

Parameter Optimization of Low-Speed Impeller Dynamic Gas-Liquid Separator for High-Gas-Contained Oil Wells

作　　者：董国驰 刘新福 郝忠献[2] 李清平 姚海元 刘春花[4] 李明[5] Dong Guochi;Liu Xinfu;Hao Zhongxian;Li Qingping;Yao Haiyuan;Liu Chunhua;Li Ming(School of Mechanical&Automotive Engineering,Qingdao University of Technology;PetroChina Research Institute of Petroleum Exploration&Development;CNOOC Research Institute Co.,Ltd.;College of Mechanical and Electrical Engineering,China University of Petroleum(East China);Sinopec Dalian Research Institute of Petroleum and Petrochemicals)

机构地区：[1]青岛理工大学机械与汽车工程学院 [2]中国石油勘探开发研究院 [3]中海油研究总院有限责任公司 [4]中国石油大学(华东)机电工程学院 [5]中国石化大连石油化工研究院

出　　处：《石油机械》2024年第2期75-81,共7页China Petroleum Machinery

基　　金：国家自然科学基金面上项目“深层大斜度升段多因素耦合排采泵动态特性及气-水-粉多相流态运移机制”(52074161);泰山学者工程专项“深水可燃冰多场多相管式多级分离与流动保障机制”(tsqn202211177);山东省高等学校青创人才引育计划项目“海洋工程可燃冰高效分离装备技术”(2021-青创-30613019);山东省自然科学基金面上项目“深水管道水合物多相多组分液塞耗散机理与流动安全机制”(ZR2022ME173)。

摘　　要：针对目前高含气井电潜螺杆泵举升效率低的问题,提出一种低速叶轮动态气液分离方法。综合高气油比、低转速、低液量等因素的影响,建立低速叶轮气液分离场气泡运移数学模型和动态气液分离RNG k-ε模型,依据SIMPLE压力-速度耦合算法求解结果,揭示叶片数目、叶片螺距和叶片长度等参数对动态气液分离效率的影响规律,并依据叶轮结构优化正交试验结果,探究转速和含气量等操作参数的敏感性及其对分离效率的影响。研究结果表明:增加叶片数目、叶片螺距和叶片长度时,低速叶轮动态分离效率先增大后减小;叶片数目为15片,叶片螺距为250 mm,叶片长度为420 mm时,分离效率达到最大值81%;增大转速可有效提升低速叶轮动态分离效率,转速由150 r/min提至300 r/min,分离效率由38%显著升至81%;同时低速叶轮动态分离效率随含气量的增加而不断减小,入口含气量由35%增至50%,分离效率则由87%降至63%。所得结论可为适用于电潜螺杆泵的低速叶轮动态气液分离设备的参数优化提供指导。The electric submersible progressive cavity pump for wells with high gas content exhibits a low lifting efficiency.This paper presents a low-speed impeller dynamic gas-liquid separator.Taking into account the influences of factors such as high gas-oil ratio,slow rotation speed and low fluid volume,a mathematical model for bubble migration in the low-speed impeller gas-liquid separation field and a RNG k-εmodel for dynamic gas-liquid separation were built.Then,based on the results of solution by SIMPLE pressure-speed coupling algorithm,the influence of parameters such as blade number,blade pitch and blade length on the dynamic gas-liquid separation efficiency was revealed.Finally,based on the results of orthogonal test on optimized impeller structure,the sensitivity of operating parameters such as rotary speed and gas content and their impact on separation efficiency were investigated.The results show that the dynamic separation efficiency of low-speed impeller increases and then decreases as the blade number,blade pitch and blade length increase.When the blade number is 15,the blade pitch is 250 mm and the blade length is 420 mm,the separation efficiency reaches the maximum value of 81%.The increase of rotary speed can effectively improve the dynamic separation efficiency of the low-speed impeller.When the rotary speed increases from 150 r/min to 300 r/min,the separation efficiency significantly increases from 38%to 81%.Simultaneously,the dynamic separation efficiency of the low-speed impeller decreases with the increase of gas content.When the gas content at inlet increases from 35%to 50%,the separation efficiency decreases from 87%to 63%.The conclusions provide guidance for parameter optimization of low-speed impeller dynamic gas-liquid separator suitable for electric submersible progressive cavity pump.

关 键 词：高含气井 动态气液分离 低速叶轮 分离效率 参数优化 

分 类 号：TE931[石油与天然气工程—石油机械设备]