Abstract: For gas field with high condensate oil content in its produced fluid and unsuitable for foam carrier technology，velocity string fluid drainage and gas production technology is selected. Because the technology has strict requirements for well selection conditions， the well selection conditions for the fluid drainage gas production technology of velocity string have been determined by analyzing such factors as critical liquid-carrying flow rate，liquid production，gas production，gas-liquid ratio，formation pressure，bottom hole flow pressure and remaining recoverable reserves of gas well. After Well P2 was subjected to an application analysis，the optimal size of velocity string，favorable gas-liquid ratio，unflowing pressure and unflowing recoverable reserves have been obtained. It solves the problem that the gas well maintains the production status through external and internal drainage，reduces the loss of natural gas blowout， and eliminates the risk of killing the gas well without timely drainage，which lays a solid foundation for the well selection conditions of this technology in the future.

Key words: velocity string, fluid drainage and gas production, well selection conditions, node analysis, condensate gas reservoir

摘要： 针对产出液凝析油含量高、不适应泡排工艺的气田，优选出速度管排液采气工艺。由于该工艺对选井条件要求比 较严格，通过对气井临界携液流量、产液量、产气量、气液比、地层压力、井底流压和气井剩余可采储量等选井因素的分析， 确定了速度管排液采气工艺的选井条件。对P2井进行了实例应用分析，得出了该井速度管最优尺寸、有利气液比大小、停 喷压力和停喷可采储量，解决了气井通过外排、内排来维持生产的现状，减少天然气放喷损失，同时根除了排液不及时压死 气井的危险，为以后实施该工艺选井打下基础。

关键词: 速度管, 排液采气, 选井条件, 节点分析, 凝析气藏