气井排液用涡流工具在不同流态的适用性研究  

Study on Feasibility of the Vortex Tool for Gas Well Fluid Drainage in Different Flow Regimes

作　　者：石怡帆 颜廷俊[1] 赵栩鹤 Shi Yifan;Yan Tingjun;Zhao Xuhe(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology)

机构地区：[1]北京化工大学机电工程学院

出　　处：《石油机械》2018年第11期116-120,共5页China Petroleum Machinery

摘　　要：目前国内对涡流工具的机理研究主要通过Fluent软件对流场进行模拟分析,但忽略了井筒实际的流态分布以及涡流工具在各流态下的适用性,导致对涡流工具机理认识不清。为了研究垂直管内流体在段塞流、搅动流和环状流下经过涡流工具前、后的动态变化过程,采用Fluent软件的瞬态模拟方法,分析流体在不同流态下经过涡流工具前、后流场的变化过程,解释涡流工具的工作机理和在各流态下的适应性。分析结果表明:涡流工具的主要作用机理是对流体能量进行转化,将部分静压转化为动压,且动压增量用于提供流体的切向速度,使流体气液相被有效分离;相比于段塞流和环状流,搅动流流体经过涡流工具后截面持液率降低,有效提高了气体的携液能力,因此涡流工具在搅动流下使用效果最佳。研究结果可为气井排液用涡流工具的现场应用提供参考。At present,the mechanism research of vortex tools in China mainly uses Fluent software to simulate the flow field,which ignores the actual flow regime distribution in the wellbore and the applicability of the vortex tool in each flow regime,leading to unclear understanding of the mechanism of the vortex tool.In order to study the dynamic behavior of fluid in the vertical pipe before and after passing through the vortex tool under the slug flow,the agitation flow and the annular flow,the transient simulation method of Fluent software is used to analyze the flow field change and explain the working mechanism of the vortex tool and the feasibility in each flow regime.The analysis results show that the main mechanism of the vortex tool is to transform the fluid energy,namely converting part of the static pressure into dynamic pressure.The increment of dynamic pressure is used to provide the fluid tangential velocity to effectively separate gas-liquid.Compared with the slug flow and the annular flow,the liquid holdup of the agitated flow after passing through the vortex tool is reduced,thus effectively improves the liquid carrying capacity of the gas.Therefore,the agitation flow is preferable for the vortex tool.The research results could provide references for the field application of vortex tool for gas well fluid drainage.

关 键 词：气井排液 涡流工具 流态 瞬态模拟 适用性 

分 类 号：TE931[石油与天然气工程—石油机械设备]