基于强制环状流的电导法持液率测量技术  

Research on Liquid Holdup Measurement by Conductivity Method Based on Forced Annular Flow

作　　者：李仲豪 张兴凯 廖锐全[2] 史宝成[2] 黄腊梅[3] Li Zhonghao;Zhang Xingkai;Liao Ruiquan;Shi Baocheng;Huang Lamei(Cooperative Innovation Center of Unconventional Oil and Gas by Ministry of Education&Hubei Province,Yangtze University;School of Petroleum Engineering,Yangtze University;Research Institute of Exploration and Development,PetroChina Tarim Oilfield Company)

机构地区：[1]长江大学非常规油气省部共建协同创新中心 [2]长江大学石油工程学院 [3]中国石油塔里木油田分公司勘探开发研究院

出　　处：《石油机械》2022年第4期101-110,共10页China Petroleum Machinery

基　　金：国家自然科学基金项目“多种通信约束下网络化智能系统的性能分析与优化设计”(62173049);省教育厅科研计划资助项目“基于多相流管内相分隔技术的油气水三相流计量方法及系统研究”(Q20191310)。

摘　　要：传统电导法测量气液两相流持液率时,测量精度易受流型影响。为此,提出了基于强制环状流的电导法气液两相流持液率测量技术,通过数值模拟和室内试验,用单头电导探针直接测量法对气液两相流持液率进行了测量研究。研究结果表明:当进口气液比一定时,气体不足以携带液体,但气相折算速度的逐渐增加使气体开始携带液体,液膜厚度随之不断增加,且随着气体体积流量的增加,液膜厚度呈先急速增加后趋于平缓态势;当入口气相表观流速一定时,随着液相体积分数的增加平均液膜厚度也随之增加,但随着流动路径增加,液膜变薄;该测量装置有效测量范围为气相表观流速5~20 m/s,液相表观流速0.079~0.480 m/s。研究结论可为移动式探针寻找强制环状流气液界面装置的设计提供理论依据。The accuracy of traditional conductivity method may be easily affected by flow pattern when it is used to measure the liquid holdup of gas-liquid two-phase flow. In this paper, a technique for measuring the liquid holdup of gas-liquid two-phase flow by conductivity method based on forced annular flow was proposed, and the liquid holdup of gas-liquid two-phase flow was measured directly with a single-head conductivity probe through numerical simulation and laboratory experiments. The results show that when the inlet gas-liquid ratio is constant, the gas begins to carry the liquid, and the liquid film thickness increases with the increase of the gas phase conversion rate, which increases sharply and then tends to be gentle. When the apparent velocity of the inlet gas phase is constant, the average liquid film thickness increases with the increase of the liquid phase volume fraction, but the liquid film becomes thinner with the increase of the flow path. The effective measurement range of the device is 5~20 m/s for the gas phase apparent velocity and 0.079~0.480 m/s for the liquid phase apparent velocity. The conclusions can provide a theoretical basis for the design of the device locating the forced annular flow gas-liquid interface with mobile probes.

关 键 词：强制环状流 电导探针 液膜厚度 持液率 相含率 

分 类 号：TE978[石油与天然气工程—石油机械设备]