深水输气管道起伏段水合物沉积堵塞规律研究
Study on the Regularity of Hydrate Deposition and Blocking in the Undulating Section of Deepwater Gas Pipeline
李少强 1高永海 2姚海元 3段纪斌 1赵欣欣1
作者信息
- 1. 中国石油大学(华东)石油工程学院,青岛 266580
- 2. 中国石油大学(华东)石油工程学院,青岛 266580;油气钻完井技术国家工程研究中心,青岛 266580
- 3. 海洋天然气水合物国家重点实验室,北京 100028
- 折叠
摘要
为了研究深水输气管道起伏管段的积液规律,准确计算起伏管段内的温压场,建立了临界携液模型、持液率模型和考虑管道倾角的温压场模型.将模型计算结果与试验数据进行对比,并对工程实例进行计算,计算结果表明,随着管道倾角的增大,起伏管段的临界携液流速和管道内的持液率均先增大后减小,且存在临界倾角.基于所建立的温压场模型,结合天然气水合物的相平衡曲线,可确定深水输气管道内的水合物生成区域.研究结果可为深水输气管道起伏段水合物的沉积堵塞预测和防治提供理论依据和思路.
Abstract
In order to study the fluid accumulation pattern in the undulating pipe sections of a deep-water gas pipeline,and to accurately calculate the temperature and pressure field in the undulating pipe sections,the critical liquid-carrying model,the liquid-holding rate model,and the temperature-pressure field model that took into account the inclination of the pipeline were established.The results of the model calculations were compared with the test data,and the calculations were performed on engineering examples.The calculation results showed that the critical fluid-carrying flow rate of the undulating pipe sections and the fluid-holding rate in the pipe increase and then decrease with the increase of the pipe inclination angle,and there is a critical inclination angle.Based on the established temperature and pressure field model and combined with the phase equilibrium curves of natural gas hydrates,the hydrate-generating region within the deepwater gas pipeline can be identified.The results of the study can provide certain ideas and theoretical basis for the prediction,prevention and management of hydrate deposition blockage in the undulating section of deep-water gas pipelines.
关键词
起伏管/水合物/积液规律/温压场/管道倾角Key words
undulating pipe/hydrate/accumulation pattern/temperature and pressure field/pipeline inclination angle引用本文复制引用
基金项目
国家自然科学基金项目(52274022)
国家自然科学基金项目(U21B2065-03)
中央高校基础科学研究服务项目(22CX01003A)
出版年
2024
NETL
NSTL
万方数据