• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (8): 175-182.doi: 10.3901/JME.2017.08.175

• • 上一篇    下一篇

采出液黏度对三相分离旋流器性能的影响

徐保蕊, 蒋明虎, 赵立新   

  1. 东北石油大学机械科学与工程学院 大庆 163318
  • 出版日期:2017-04-15 发布日期:2017-04-15
  • 作者简介:

    徐保蕊,男,1985年出生,博士研究生。主要研究方向为流体机械及工程技术、旋流分离技术。

    E-mail:xubaorui2009@126.com

    蒋明虎(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为以旋流分离技术和离心分离技术为特色的油田水处理技术、流体机械及工程技术、非均相介质分离技术。发表论文150余篇。

    E-mail:jmhdq2015@163.com

  • 基金资助:
    * 国家教育部高等学校博士学科点专项科研基金(博导类,20132322110002)和国家高技术研究发展计划(863计划,2012AA061303)资助项目; 20160125收到初稿,20161114收到修改稿;

Effect of Production Fluid Viscosity on the Performance of Three Phase Separation Hydrocyclone

XU Baorui, JIANG Minghu, ZHAO Lixin   

  1. School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318
  • Online:2017-04-15 Published:2017-04-15

摘要:

三相分离旋流器是一种用于油田三元采出液气液固三相分离的新型旋流器。基于计算流体动力学(Computational fluid dynamics,CFD)软件Fluent,采用雷诺应力模型(Reynolds stress model,RSM),开展不同采出液混合液相黏度变化对气液固三相分离旋流器速度场、压力特性和脱气除砂效果影响的数值模拟对比分析。研究结果表明:在黏度不大于6.42 mPa·s时,旋流器受黏度增大的影响,切向速度幅值成降低趋势,切向速度均值降低12.4%,整体上,在研究范围内,该结构旋流器速度场受黏度变化影响相对较小;在黏度不大于6.42 mPa·s时,旋流器脱气效率和除砂效率均高于80%,旋流器脱气效率最高可达95.97%、对应除砂效率95.19%;研究范围内,混合液黏度变化对旋流器压力降影响较大。随着黏度增加,旋流器溢流压力降逐渐减小、底流压力降逐渐增加。根据相似参数准则,制作了旋流器试验样机,并开展了现场采出液室内试验。模拟与试验结果吻合良好,从而验证了模拟计算结果的可靠性。研究可对适合高黏度介质分离三相分离旋流器的设计提供参考。

关键词: 分离, 黏度, 三元复合驱, 试验验证, 数值模拟, 脱气除砂, 旋流器

Abstract:

Three phase separation hydrocyclone is a new type hydrocyclone used for the gas-liquid-solid three-phase separation of the Alkali-Surfactant-Polymer(ASP) flooding produced fluid. Based on the Reynolds stress model (RSM) of the computational fluid dynamics(CFD) software Fluent, the velocity field, pressure characteristics and separation efficiency of the gas-liquid-solid three-phase separation hydrocyclone are analyzed by numerical simulation. Results show that when the viscosity is no more than 6.42 mPa·s, although affected by the increase of viscosity the tangential velocity of the hydrocyclone decreased by 12.4%, but has less effect velocity field on the whole. When the viscosity is no more than 6.42 mPa·s, de-gassing efficiency and de-sanding efficiency of the hydrocyclone are higher than 80%, the highest degassing efficiency can reach 95.97%, and the corresponding de-sanding efficiency is 95.19%.The rise of viscosity has great influence on the cyclone pressure drop, the overflow pressure drop decreases, while underflow pressure drop increases. According to the similarity parameter criterion, the hydrocyclone experimental prototype is made, and the laboratory separation tests of the field produced fluid are carried out. The experiment results are in good agreement with the experimental results, which verifies the reliability of the simulation results. Research results can provide a reference for the design for three phase separator with higher viscosity medium separation.

Key words: ASP flooding, de-gassing and de-sanding, experimental verification, numerical simulation, separation, viscosity, hydrocyclone