摘要
在地形起伏地区,由于管道内水蒸气、凝析液等析出,地形低洼处管道易形成积液,堵塞管道,降低输气效率,危及管道及设备安全。为此,结合现场实际生产数据,对上倾管道中临界携液气速进行研究,发现随表观气速的增加,上倾管道压降先减小后增加。取最小压降点为临界携液状态,其对应气体表观流速为临界携液气速。探究不同管道倾角、含水率、管径下的临界携液气速变化规律,发现临界携液气速随管道倾角增加呈对数变化趋势,随含水率、管径增加线性增加。结合液膜模型假设得到临界携液气速公式,采用现场数据进行模拟,验证了该公式具有良好的预测效果。(图8,表2,参20)
In the undulating terrain area, liquid loading may be formed in the pipelines in the low-lying area due to the precipitation of water vapor and condensate in the pipelines, which may block the pipelines and reduce the efficiency of gas transportation, further threatening the safety of the pipelines and equipment. Therefore, the critical liquid-carrying gas velocity in updip pipelines was studied with reference to the actual production data. It is found that the pressure drop of updip pipeline decreases at first and then increases with the increase of superficial gas velocity. Regarding the minimum pressure drop point as the critical state of liquid carrying, the superficial gas velocity is the critical liquid-carrying gas velocity. As shown in the studies on change rule of the critical liquid-carrying gas velocity under different dip angles, water content and pipeline diameter, the critical liquid-carrying gas velocity changes logarithmically with the increase of dip angle.Besides, it also increases linearly with the increasing of water content and pipeline diameter. By obtaining the critical liquidcarrying gas velocity formula in combination with the liquid film model hypothesis, the prediction effect of the formula is simulated and verified with the field data.(8 Figures, 2 Tables, 20 References)
作者
陈建磊
石家凯
杨光
何利民
吕宇玲
CHEN Jianlei;SHI Jiakai;YANG Guang;HE Limin;LYU Yuling(SINOPEC Petroleum Engineering Corporation;College of Pipeline and Civil Engineering,China University of Petroleum(East China))
出处
《油气储运》
CAS
北大核心
2022年第1期70-75,共6页
Oil & Gas Storage and Transportation
基金
中石化集团公司科研项目“高含硫气田平台期开发生产安全保障技术及工业化应用”,319022-12。
关键词
起伏管道
积液
临界携液气速
持液率
OLGA
undulating pipelines
liquid loading
critical liquid-carrying gas velocity
liquid holdup
OLGA
