垂直井筒中涡流工具流动特性数值分析
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摘要
为了更清楚地了解排水采气过程中管内流场分布情况及涡流工具中流体的运动情况,利用流体数值模拟软件,针对连续油管及涡流排水采气技术进行研究,同时对两种排水采气方式内部流场进行分析和对比,得到液相分布云图和速度图。通过对涡流工具的研究以及模拟分析可以得出以下结论:在该两相流模式中,管壁液相流动是主要的一种流动形式,涡流工具主要是依靠其结构对流体进行导向流动,流体在涡流工具的作用下产生旋转流动。在涡流排水采气过程中,含液量对轴向速度及切向速度影响相对较小,含液量主要影响过流压降。
In order to understand more about the distribution of flow field in the process of water drainage for gas production and the movement of fluid in vortex tool, fluid numerical simulation software is used to study the technology of coiled tubing and vortex drainage gas recovery. Meanwhile, the internal flow fields of the two drainage for gas production methods are analyzed and compared, the liquid phase distribution cloud map and velocity map are then obtained.Through the research and simulation analysis of the vortex tool, the conclusions are as follows: tube wall liquid flow is the main form of flow in the two-phase flow mode; the vortex tool mainly relies on its structure to guide the flow of the fluid,and the fluid generates a rotating flow under the action of the vortex tool. In the process of vortex drainage for gas production, the influence of liquid content on axial velocity and tangential velocity is relatively small, and it mainly affects the overcurrent pressure drop.
In order to understand more about the distribution of flow field in the process of water drainage for gas production and the movement of fluid in vortex tool, fluid numerical simulation software is used to study the technology of coiled tubing and vortex drainage gas recovery. Meanwhile, the internal flow fields of the two drainage for gas production methods are analyzed and compared, the liquid phase distribution cloud map and velocity map are then obtained.Through the research and simulation analysis of the vortex tool, the conclusions are as follows: tube wall liquid flow is the main form of flow in the two-phase flow mode; the vortex tool mainly relies on its structure to guide the flow of the fluid,and the fluid generates a rotating flow under the action of the vortex tool. In the process of vortex drainage for gas production, the influence of liquid content on axial velocity and tangential velocity is relatively small, and it mainly affects the overcurrent pressure drop.
引文
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[2]罗世应,孟英峰,李允,等.气藏泡沫欠平衡钻井数学模型研究[J].天然气工业,2000,20(5):47-50.
[3]马光长,唐军,高强.泡沫充气流体密度及液柱压力的计算方法[J].钻采工艺,2004,27(4):16-18.
[4]国丽萍,韩洪升.井筒中高温高压可循环微泡沫钻井液流动实验[J].大庆石油学院学报,2007,31(1):41-43.
[5]王利国,杨虎,许期聪,等.稳定泡沫钻水平井井筒稳态流动的解析模型[J].天然气工业,2008,28(6):90-92.
[6]张小宁,李根生,黄中伟,等.泡沫钻井液在井筒中的流动与传热[J].石油学报,2010,31(1):134-138.
[7]杨胜来,邱吉平,何建军,等.高温高压下CO2泡沫压裂液摩阻计算研究[J].石油钻探技术,2007,35(6):1-4.
[8]李兆敏,王登庆,黄善波,等.泡沫流体在井筒内流动时的耦合数学模型[J].西南石油大学学报(自然科学版),2008,30(6):1-4.
[9]王冠华,李兆敏.泡沫在井筒中流动的水力计算新方法[J].燕山大学学报,2009,33(4):363-367.
[10]李松岩,李兆敏,林日亿.泡沫举升排酸过程井筒压力温度数学模型研究[J].西南石油大学学报(自然科学版),2009,31(2):59-63.
[11]杨志,廖云虎,左锋,等.组合油管柱接力式柱塞气举装置研制[J].石油矿场机械,2008,37(02):25-27.
[12]黄艳,呼玉川,佘朝毅,等.球塞气举排水采气工艺技术研究与应用[J].钻采工艺,2006,29(04):61-63.
[13]李颖川,覃斌,刘永辉.球塞气举可视化物理模拟实验研究[J].天然气工业,2004,24(11):103-105.
[14] DARIN L L,WALTER D P. Flow development chamber for creating a vortex flow and a laminar flow:US,6749374B1[P]. 2004-05-15
[15]张翠婷.涡流工具在天然气井井底排液中的应用[D].大庆:东北石油大学,2012.
[16]冯翠菊,王春生,张黉,等.天然气井下涡流工具排液效果影响因素分析[J].石油机械,2013,41(1):78-81.
[17]徐建宁,邵乐,梁慧荣,等.基于正交试验的涡流排水采气影响因素分析[J].石油矿场机械,2014,43(11):52-56.
[18]蒋成银,于宏超.涡流排水采气工艺理论研究[J].化工管理,2014(27):182.