倾斜管不同黏度气液两相段塞流持液率实验及预测方法

doi:10.3969/j.issn.1006-6535.2024.04.020

特种油气藏 ›› 2024, Vol. 31 ›› Issue (4): 156-162.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

刘自龙^1,2, 钱萧^1,2, 刘超³, 管桐⁴, 王伟⁵, 廖锐全¹

1.长江大学油气钻采工程湖北省重点实验室,湖北武汉 430100;
2.中国石油气举试验基地多相流研究室,湖北武汉 430100;
3.中国石油渤海钻探工程公司,河北廊坊 065000;
4.中国石油华北油田分公司,河北任丘 062550;
5.中国石油吐哈气举技术中心,新疆鄯善 839009

收稿日期:2023-08-12 修回日期:2024-04-29 出版日期:2024-08-25 发布日期:2024-09-20
通讯作者: 廖锐全(1962—),男,教授,1984年毕业于江汉石油学院采油工程专业,2002年毕业于华中科技大学控制理论与控制工程专业,获博士学位,现从事石油工程领域的相关教学与研究工作。
作者简介:刘自龙(1987—),男,讲师,2011年毕业于长江大学油气储运工程专业,2019年毕业于该校油气储运工程专业,获博士学位,现从事多相流体流动规律及气举采油工艺技术等方面的研究。
基金资助:
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);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)

Experiment and Prediction Method of Liquid Holdup of Gas-liquid Two-phase Slug Flow with Different Viscosity in Inclined Tube

Liu Zilong^1,2, Qian Xiao^1,2, Liu Chao³, Guan Tong⁴, Wang Wei⁵, Liao Ruiquan¹

1. Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, Yangtze University, Wuhan, Hubei 430100, China;
2. Laboratory of Multiple Phase Pipe Flow Gas Lift Innovation Center, CNPC, Wuhan, Hubei 430100, China;
3. CNPC Bohai Drilling Engineering Company, Limited, Langfang, Hebei 065000, China;
4. PetroChina Huabei Oilfield Company, Renqiu, Hebei 062550, China;
5. PetroChina Tuha Gas Lift Technology Center, Shanshan, Xinjiang 839009, China

Received:2023-08-12 Revised:2024-04-29 Online:2024-08-25 Published:2024-09-20

摘要/Abstract

摘要： 准确预测持液率可为井筒中的流型判断和压降预测提供重要依据,段塞流为稠油井筒中最常见流型,井筒高黏流体将加重气液两相滑脱,导致现有持液率模型应用于高黏流体的预测精度变差。为此,基于多相管流实验平台,在内径为60 mm的测试管段内开展段塞流持液率实验,获取了不同黏度、不同倾角段塞流流型及持液率数据,研究了黏度对持液率和流型转变的影响规律,并结合实验现象和理论推导,提出了倾斜管不同黏度气液两相段塞流持液率新模型。研究结果表明:液相黏度的增加,会增加液相与管壁之间的黏滞力,导致持液率增加;黏度对持液率的影响会改变段塞流与其他流型的转变界限。以Kora液塞区持液率关系式为基础,建立了用混相黏度代替液相黏度的倾斜管气液两相段塞流持液率新模型,并利用实验数据和文献数据进行了验证,证实新模型具有更高的精度。该研究可为预测稠油井井筒压降提供技术支持。

关键词: 段塞流, 持液率, 气液两相流, 倾斜管, 稠油

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 fluids 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 experimental 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 intensify 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 patterns. A new model for liquid holdup in gas-liquid two-phase slug flow in inclined pipes is established. This model 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 research can provide technical support for predicting pressure drop in heavy oil wellbores.

Key words: slug flow, liquid holdup, gas-liquid two-phase flow, inclined pipes, heavy oil

中图分类号:

TE329

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.

Liu Zilong, Qian Xiao, Liu Chao, Guan Tong, Wang Wei, Liao Ruiquan. Experiment and Prediction Method of Liquid Holdup of Gas-liquid Two-phase Slug Flow with Different Viscosity in Inclined Tube[J]. Special Oil & Gas Reservoirs, 2024, 31(4): 156-162.

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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

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