气井携液临界流量计算方法研究  

Research of Gas Well Liquid-Carrying Critical Rate Model

作　　者：李元生[1] 李相方[1] 藤赛男 刘晓东[1] 徐大融[1] 任美鹏[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]上海海洋油气分公司研究院,上海200120

出　　处：《工程热物理学报》2014年第2期291-294,共4页Journal of Engineering Thermophysics

摘　　要：目前水平井中气液两相流动携液临界流量的计算方法仅考虑了水平井段的携液情况而没有考虑直井段与斜井段对携液的影响,所以在直井段和斜井段中未完全携带出的残余流体还是会流到井底,从而在水平井中产生积液.本文对液滴在水平井中直井段,斜井段和水平段进行受力分析发现,在不同的井段液滴因为受力不同从而产生不同的形变,从而计算的携液临界流量也不相同。基于携液理论与气液两相流型理论,根据不同位置的受力情况分别推导了液滴处于直井段,斜井段和水平段时的携液临界流量公式.而水平井的携液临界流量应该为液滴从直井段,斜井段和水平段流过时携液临界流量的最大值。最后通过理论计算与实验结果验证了方法的正确性.The present calculation methods of critical liquid-carrying rate in horizontal wells only consider horizontal section influence, but not realize the influences of vertical well section and deviated well section, so remnant wellbore liquid loading which do not be carried out from the vertical well section and deviated well section will flow into horizontal well section leading bottom hole liquid loading. Through the force analysis of droplets in vertical well section, deviated well section and horizontal well section, this paper finds that different forces in those sections have different droplets deformation,which will lead different liquid-carrying critical rate. Based on Carrying fluid theory and the gas-liquid two-phase flow theory, this paper derivate critical liquid-carrying rate model due to different forces in vertical well section, deviated well section and horizontal well section.The critical liquid-carrying rate in horizontal well is the maximum of all the sections. This theory has been demonstrated by experiments.

关 键 词：液滴 液滴变形 水平井 气液两相流动 携液临界流量 

分 类 号：TK124[动力工程及工程热物理—工程热物理]