摘要
为了促进涡流排水采气技术在长庆气田的应用,对涡流工具工作机理及效果影响因素进行研究,建立几何模型及数学物理模型,应用Fluent软件进行数值模拟,优化工具结构,确定适用气井基本条件。研究结果表明,涡流工具有效实现了流体由紊流流态转变为二相层流流态,并可持续很长一段距离;螺旋角度是影响涡流工具气液分离效果的主要因素,角度为50°时效果最好;入口速度越大带液效果越好,速度大于17 m/s时气液分离效果变化不大。总体趋势为气液比越小,分离效果越好;井下涡流工具降低临界携液流量约25%,对套压大于8 MPa、产气量大于0.5×104m3/d、井筒完好的低压弱喷气井适用。该研究成果为涡流工具的现场应用起到了促进作用。
In order to facilitate the application of vortex drainage gas recovery technology in the Zizhou gas field,the working mechanism and affecting factors of vortex tool were researched; Geometric model and mathematical model were established to optimize the tool structure by using Fluent software,than the applicable conditions of vortex tool in gas wells were determined. The research results showed that the vortex tool could transform turbulent flow regime into two- phase laminar flow regime,also,the regime could last over a long distance; simultaneously,helix angle was the main factor affecting the gas- liquid separation of vortex tools,the helix angle of 50 degrees the effect was the best. The larger inlet velocity,the better drainage,when inlet velocity was larger than 17 m / s,the gas- liquid separation effect changed little. The smaller gas- liquid ratio,the better the separation effect was. The vortex tools could reduce critical liquid carrying flow about 25%. Vortex tools was applicable for low pressure gas well whose casing pressure isgreater than 8MPa and gas production is greater than 0. 5 ×104m3/ d. The research results played a catalytic role in field application of vortex tools.
出处
《钻采工艺》
CAS
北大核心
2015年第3期49-51,11-12,共3页
Drilling & Production Technology
基金
国家科技专项"低渗低丰度砂岩气藏经济有效开发技术"(编号:2011ZX05015-001)
关键词
涡流
模型
FLUENT
数值模拟
促进
vortex,model,FLUENT,numerical simulation,drainage gas recovery technology
