特种油气藏2024，Vol.31Issue(4)：156-162,7.DOI:10.3969/j.issn.1006-6535.2024.04.020
倾斜管不同黏度气液两相段塞流持液率实验及预测方法
Experiment and Prediction Method of Liquid Holdup of Gas-liquid Two-phase Slug Flow with Different Viscosity in Inclined Tube
摘要
Abstract
Accurate prediction of liquid holdup provides important basis for flow pattern identification and pressure drop calculation in wellbores.Slug flow is the most common flow pattern in heavy oil wellbores.High-viscosity flu-ids in the wellbore will exacerbate gas-liquid two-phase slippage,resulting in poor prediction accuracy of existing holdup models applied to high-viscosity fluids.Therefore,a new model for liquid holdup in gas-liquid two-phase slug flow in inclined pipes with different viscosities is proposed.This proposal is based on experimental observations and theoretical derivations.The holdup experiments of slug flow are conducted in a multiple phase pipe flow experi-mental platform,in a test string with an inner diameter of 60 mm.The influence of viscosity on liquid holdup and flow pattern transitions is studied based on the data of slug flow patterns and liquid holdup obtained with different viscosities and different inclinations in the experiments.The study shows that an increase in liquid viscosity will in-tensify the viscous resistance between the liquid phase and the pipe wall,resulting in a rise in liquid holdup.While the effect of viscosity on liquid holdup will change the transition boundaries between slug flow and other flow pat-terns.A new model for liquid holdup in gas-liquid two-phase slug flow in inclined pipes is established.This mod-el is based on the Kora liquid holdup relationship formula and uses mixed-phase viscosity instead of liquid-phase viscosity.The model is validated by experimental and literature data,with confirmed higher accuracy.This re-search can provide technical support for predicting pressure drop in heavy oil wellbores.关键词
段塞流/持液率/气液两相流/倾斜管/稠油Key words
slug flow/liquid holdup/gas-liquid two-phase flow/inclined pipes/heavy oil分类
能源科技引用本文复制引用
刘自龙,钱萧,刘超,管桐,王伟,廖锐全..倾斜管不同黏度气液两相段塞流持液率实验及预测方法[J].特种油气藏,2024,31(4):156-162,7.基金项目
国家自然科学基金"多种通讯约束下网络化智能系统的性能分析与优化设计"(62173049) （62173049）
油气钻采工程湖北省重点实验室开放基金"基于特征参数方法的深层水平井井筒流型转变机理及流动规律研究"(YQZC202310) （YQZC202310）
