CO_(2)驱采出液新型气液旋流分离器分离特性数值研究  

Numerical Study on Separation Characteristics of a New Type of Gas-liquid Cyclone Separator for CO_(2) Flooding Produced Liquid

作　　者：张平 朱国承 穆中华 李晨[2] 王昌尧 ZHANG Ping;ZHU Guocheng;MU Zhonghua;LI Chen;WANG Changyao(Changqing Engineering Design Co.,Ltd.;Huatugou Multi-purpose Station of No.3 Oil Production Plant of Qinghai Oilfield)

机构地区：[1]长庆工程设计有限公司 [2]青海油田采油三厂花土沟联合站

出　　处：《油气田地面工程》2022年第5期34-39,共6页Oil-Gas Field Surface Engineering

摘　　要：CO_(2)驱油技术的推广,给油气两相高效分离带来了新的挑战。基于中国石油大学(华东)开发的新型气液旋流单管装置,设计出一种高效的油气分离装置,并使用数值模拟的方法,基于RNG k-ε模型和欧拉双流体模型,研究不同进口流量对气液分离性能的影响。结果表明,在复杂工况下,新型气液旋流器除液最高效率为90.93%,脱气效率最高为95.33%。随着进口流量的增加,气出口的液相质量流量小幅增加。在不同工况下,液相出口的脱气效果较好,脱气效率在94%~95%之间波动,液相的体积分数均在99.99%以上,表明液出口几乎没有气相排出。通过分析可知,入口流量对于气出口夹液现象影响较大,而对液出口的脱气效率影响较小。The popularization of CO_(2) flooding technology has brought new challenges to the efficient separation of oil and gas phases.Based on the new gas-liquid cyclone with a single tube developed by China University of Petroleum(East China),a high-efficiency oil-gas separation device is designed.Then using numerical simulation method,by means of RNG k-εmodel and Euler-Euler two-fluid model,the effect of different inlet flow rates on gas-liquid separation performance is studied.The re-sults show that under complex working conditions,the new gas-liquid cyclone has good separating ef-fectiveness,with the highest liquid removal efficiency of 90.93%and the highest degassing efficiency of 95.33%.With the increase of inlet flow rate,the liquid mass flow at the gas outlet increases slightly.However,under different working conditions,the degassing effect at the liquid outlet is better,the degassing efficiency fluctuates between 94%and 95%,and the volume fraction of the liquid phase is above 99.99%,indicating that almost no gas is discharged from the liquid outlet.The analysis reveals that the inlet flow rate has a great effect on the phenomenon of liquid entrainment at the gas outlet,but a little effect on the degassing efficiency at the liquid outlet.

关 键 词：新型旋流器 气液分离 进口流量 分离性能 数值模拟 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]