气水两相下降流中泡状流与段塞流转换边界研究

冯一波; 石书强; 王建海; 丁保东; 李婷婷; 徐梓然; 王珍; 韩宇飞

doi:10.3969/j.issn.1006-6535.2024.02.020

特种油气藏 >

2024 , Vol. 31 >Issue 2: 166 - 174

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.02.020

钻采工程

气水两相下降流中泡状流与段塞流转换边界研究

冯一波 ,
石书强 ,
王建海 ,
丁保东 ,
李婷婷 ,
徐梓然 ,
王珍 ,
韩宇飞

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1.中国石化缝洞型油藏提高采收率重点实验室,新疆乌鲁木齐 830011;
2.重庆科技学院,重庆 401331

冯一波(1983—),男,高级工程师,2007年毕业于成都理工大学资源勘查工程专业,2010年毕业于该校油气田开发地质专业,获硕士学位,现从事气驱提高采收率技术研究工作。

石书强(1990—),男,讲师,2014年毕业于哈尔滨石油学院石油工程专业,2019年毕业于西南石油大学油气田开发工程专业,获博士学位,现从事采油采气理论与技术研究工作。

收稿日期: 2022-12-13

修回日期: 2024-01-20

网络出版日期: 2024-07-26

基金资助

重庆市自然科学基金面上项目“入口结构对垂直管气液两相向下流流型影响规律研究”(cstc2020jcyj-msxmX0896)

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Study on the Transition Boundary between Bubbly Flow and Slug Flow in Gas-Water Two-Phase Descending Flow

Feng Yibo ,
Shi Shuqiang ,
Wang Jianhai ,
Ding Baodong ,
Li Tingting ,
Xu Ziran ,
Wang Zhen ,
Han Yufei

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1. Sinopec Key Laboratory of Enhanced Recovery from Fractured-Vuggy Reservoirs, Urumqi, Xinjiang 830011, China;
2. Chongqing University of Science and Technology, Chongqing 401331, China

Received date: 2022-12-13

Revised date: 2024-01-20

Online published: 2024-07-26

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摘要

针对塔河油田气水混注驱替“阁楼油”过程中泡状流与段塞流转换边界不清的问题,利用数值模拟方法对气水两相下降流中泡状流与段塞流进行了模拟分析。结果表明:在气相表观流速为0.01～1.00 m/s、液相表观流速为0.03～2.00 m/s、管径为76 mm的模拟条件下,管道中主要为泡状流和段塞流;与模拟结果相比,Barnea、Kokal、薛玉卿模型预测的转换边界偏小,Bhagwat和Yijun模型预测的转换边界偏大;随着气相表观流速增加,泡状流向段塞流转换时所需液量逐渐增大;在低液量条件下,越靠近管道中心,气泡数量越多,空隙率越大;随液量增加,单个小气泡体积减小,气泡在整个管道横截面上分布越均匀。基于漂移模型,考虑气泡群滑脱速度,建立了新的泡状流与段塞流转换边界模型,216组文献数据验证结果显示,新模型准确率为95.37%,准确度较高。建立的泡状流—段塞流转换边界模型,不仅可提高井筒压力、温度模型的计算精度,同时对塔河油田现场注入井井口参数优化、注入设备优选和提高“阁楼油”驱替效率有很好的理论指导意义。

关键词： 泡状流; 段塞流; 转换边界; 气水混注; 阁楼油; 缝洞型油藏

本文引用格式

冯一波 , 石书强 , 王建海 , 丁保东 , 李婷婷 , 徐梓然 , 王珍 , 韩宇飞 . 气水两相下降流中泡状流与段塞流转换边界研究[J]. 特种油气藏, 2024 , 31(2) : 166 -174 . DOI: 10.3969/j.issn.1006-6535.2024.02.020

Abstract

To address the problem of unclear transition boundary between bubbly flow and slug flow in the process of gas-water mixed injection to displace the "attic oil" in the Tahe Oilfield, the numerical simulation method was used to simulate and analyze the bubbly flow and slug flow in the gas-water two-phase descending flow. The results show that: under the simulation conditions of gas-phase apparent flow rate of 0.01-1.00 m/s, liquid-phase apparent flow rate of 0.03-2.00 m/s, and pipe diameter of 76 mm, the pipeline is mainly characterized by bubbly flow and slug flow; compared with the simulation results, the transition boundary predicted by the Barnea, Kokal, and Xue Yuxing models is small, and that predicted by the Bhagwat and Yijun models is large; with the increase of the gas-phase apparent flow rate, the liquid volume required for the transition from bubbly flow to slug flow gradually increases; under the condition of low liquid volume, the closer to the center of the pipeline, the higher the number of bubbles and the larger the void ratio; with the increase of liquid volume, the volume of individual small bubbles decreases, and the more uniformly the bubbles are distributed throughout the cross-section of the pipeline. Based on the drift model, a new bubbly flow-slug flow transition boundary model was established by considering the bubble group slipping velocity, and 216 sets of literature data validation results show that the accuracy of the new model is 95.37%, which is high. The established bubbly flow-segment plug flow transition boundary model cannot only improve the calculation accuracy of the wellbore pressure and temperature model, but also has a good theoretical significance for the optimization of wellhead parameters, the selection of injection equipment, and the improvement of the efficiency of "attic oil" displacement in the field of Tahe Oilfield.

Key words： bubbly flow; slug flow; transition boundary; gas-water mixed injection; attic oil; fractured-vuggy reservoirs

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