管内相分隔状态下湿气两相流双参数测量方法

doi:10.16085/j.issn.1000-6613.2023-1368

化工进展 ›› 2024, Vol. 43 ›› Issue (2): 722-733.DOI: 10.16085/j.issn.1000-6613.2023-1368

管内相分隔状态下湿气两相流双参数测量方法

边汉青¹(), 张兴凯¹(), 廖锐全¹, 王栋², 李锐¹, 罗晓矗¹, 侯耀东¹, 白晓弘³, 甘庆明³

^1.油气钻采工程湖北省重点实验室(长江大学)，湖北武汉 430010
^2.西安交通大学动力工程多相流国家重点实验室，陕西西安 710049
^3.长庆油田分公司油气工艺技术研究院，陕西西安 710021

收稿日期:2023-08-10 修回日期:2023-10-28 出版日期:2024-02-25 发布日期:2024-03-07
通讯作者: 张兴凯
作者简介:边汉青（1999—），男，硕士研究生，研究方向为石油工程多相流流量测量。E-mail：1271752268@qq.com。
基金资助:
国家自然科学基金(62173049);油气钻采工程湖北省重点实验室开放基金(YQZC202309)

Double-parameter measurement method of wet gas in phase-isolation state

BIAN Hanqing¹(), ZHANG Xingkai¹(), LIAO Ruiquan¹, WANG Dong², LI Rui¹, LUO Xiaochu¹, HOU Yaodong¹, BAI Xiaohong³, GAN Qingming³

^1.Hubei Key Laboratory of Petroleum Drilling and Production Engineering, Yangtze University, Wuhan 430010, Hubei, China
^2.State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
^3.Oil and Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi'an 710021, Shaanxi, China

Received:2023-08-10 Revised:2023-10-28 Online:2024-02-25 Published:2024-03-07
Contact: ZHANG Xingkai

摘要/Abstract

摘要：

能源转型使得天然气产量保持快速增长、进入高质量发展阶段，目前天然气产业体系结构也日渐完善。传统天然气流量计难以满足对现有测量精度和实时性的需求，湿天然气中液相组分影响了测量结果，这将极大地增加湿气计量的难度与成本，因此亟需一种简单便捷、高精度的在线测量方法。本研究旨在探索湿气流量的双参数测量方法，并采用叶片式旋流器将难以测量的液滴或分层流形成为气柱-液环的管内相分隔状态，来减少流型对实验的误差影响，通过采用文丘里管测量轴向压差、径向压差双参数，得出了湿气双参数测量方法。针对在高压的天然气密闭输送条件下，通过分析管内相分隔状态下相分布、压力场和速度场等因素对双压差的影响，建立了具有良好适用性的多因素相关性测量模型，并在TH油田湿气实验平台进行了现场试验验证及校准，试验效果良好并且气相与液相质量流量的误差范围为±5%和±9%。

关键词: 气液两相流, 湿气, 双参数测量, 管内相分隔, 数值模拟

Abstract:

Natural gas, a green, low-carbon and environmentally friendly energy source, is experiencing rapid growth and high-quality development due to energy transformation. At present, the system structure of natural gas industry is continuously evolving. However, traditional natural gas flowmeters struggle to meet the current requirements for measurement accuracy and real-time performance. The presence of liquid phase components in wet natural gas can distort measurement results, significantly increasing the complexity and cost of wet gas measurement. Therefore, there is an urgent need for an accurate, convenient and efficient online measurement method. This study aims to explore a dual-parameter method for measuring wet gas flow. A vane cyclone was employed to convert hard to measure liquid droplets or stratified manifold into a phase-isolation state of gas column and liquid ring. This process mitigates the influence of flow pattern on experiment error. By using a Venturi tube to measure two parameters: axial pressure difference and radial pressure difference, leading to the development of a dual-parameter wet gas measurement method. Taking into account factors such as phase distribution, pressure field, velocity field and other conditions related to high pressure closed gas transportation, a multi-factor correlation measurement model with strong applicability was established. This model was tested and calibrated in the field using the wet gas experimental platform at TH Oilfield. The results were good, with error margins of ±5% and ±9% for gas phase and liquid phase mass flow.

Key words: gas-liquid two-phase flow, wet gas, double-parameter measurement, phase-isolation, numerical simulation

中图分类号:

O359.1

边汉青, 张兴凯, 廖锐全, 王栋, 李锐, 罗晓矗, 侯耀东, 白晓弘, 甘庆明. 管内相分隔状态下湿气两相流双参数测量方法[J]. 化工进展, 2024, 43(2): 722-733.

BIAN Hanqing, ZHANG Xingkai, LIAO Ruiquan, WANG Dong, LI Rui, LUO Xiaochu, HOU Yaodong, BAI Xiaohong, GAN Qingming. Double-parameter measurement method of wet gas in phase-isolation state[J]. Chemical Industry and Engineering Progress, 2024, 43(2): 722-733.

图/表 19

图1 物理模型结构示意图

图2 管内相分隔径向压差理论示意图

图3 网格无关性验证

图4 网格划分

图5 试验工况在流型图上的分布

图6 不同含液率下相分布图

图7 管道截面分布云图

图8 文丘里管轴心线压力分布

图9 压力与密度比对压差的影响

图10 质量流量与含液率对压差的影响

表1 模型R2

模型	R²
修正前虚高模型	0.937
修正前液气质量比模型	0.918
新虚高模型	0.962
新液气质量比模型	0.946

图11 TH油田中国石油气举中心湿气测量平台

图12 实验工艺流程图

表2 实验参数范围

压力/MPa	含水率/%	气流量/m³·h^-1	液流量/m³·h^-1
1	0	600~1500	0
1	2.5	600~1500	1.65~4.12
1	5	600~1500	3.28~8.24
3	0	600~1500	0
3	2.5	600~1500	0.55~1.38
3	5	600~1500	1.10~2.74
5	0	600~1500	0
5	2.5	600~1500	0.34~0.84
5	5	600~1500	0.67~1.69

表3 校准补偿参数表

计量阀开度/%	气相平均误差/%
20.6	-4.23
26	-1.81
30.3	0.85
42	2.32
51	2.23
15.6	-2.38

图13 实测值与双参数测量值的比较

图14 气相与液相测量误差

表4 不同压力情况下测量误差

井口压力/MPa	气相平均误差/%	液相平均误差/%
1	-0.55	-1.18
3	2.15	-2.26
5	1.51	-4.56

图15 含液率与测量误差相关性

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管内相分隔状态下湿气两相流双参数测量方法

Double-parameter measurement method of wet gas in phase-isolation state

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