凝析气藏水平气井倾斜段油–气–水三相携液规律研究  

The Study on the Liquid-Carrying Behavior of Oil-Gas-Water Three-Phase Flow in the Inclined Section of a Horizontal Gas Well in a Condensate Gas Reservoir

作　　者：李晨 王懿 吴杰 

机构地区：[1]重庆科技大学石油与天然气工程学院,重庆

出　　处：《石油天然气学报》2024年第4期361-371,共11页Journal of Oil and Gas Technology

摘　　要：凝析气藏在开发过程中,随着地层压力的降低,会出现凝析油,这使得井筒中的油气水三相的相态变化与流动规律变得更加复杂,增大气井携液难度。为了深入理解该过程中的相态变化规律,本文采用VOF耦合水平井模型对水平气井倾斜段中油气水三相流动进行数值模拟,研究了不同倾斜角、流速、含气率下油–气–水三相在水平气井倾斜段中的流动特性,并分析这些参数对于油气水三相流体在倾斜段中分布、流动形态及相互作用的影响。模拟结果表明:随着流速的增大,出现的泡状流向分层流转变,随着含气率的增大,出现泡状流–分层流–段塞流转变,随着倾斜角的增大,流型由波状流–段塞流–分层流的连续转变。值得注意的是,通过模拟还发现,当倾斜角大于45˚时,油相趋向在管道底部聚集,这一现象有可能会增加油相沉积的风险。In the development of condensate gas reservoirs, as the formation pressure decreases, condensate oil appears, which complicates the phase changes and flow patterns of the oil-gas-water three-phase system in the wellbore, increasing the difficulty of liquid carrying in gas wells. To gain a deeper understanding of these phase changes, this paper uses a VOF-coupled horizontal well model for numerical simulation of the oil-gas-water three-phase flow in the inclined section of a horizontal gas well. The study examines the flow characteristics of the oil-gas-water three-phase under different inclination angles, flow rates, and gas contents, and analyzes the impact of these parameters on the distribution, flow patterns, and interactions of the three-phase fluids in the inclined section. Simulation results indicate that with increasing flow rate, the flow pattern transitions from bubbly flow to stratified flow;with increasing gas content, the transition is from bubbly flow to stratified flow to plug flow;with increasing inclination angle, the flow pattern changes continuously from w

关 键 词：凝析气藏 油气水三相 数值模拟 

分 类 号：TE3[石油与天然气工程—油气田开发工程]