摘要
在多相流管输体系下,水合物浆液在流动过程中会遇到崎岖不平的地形地貌,此时采用倾斜管道显得尤为重要。因此,研究了天然气水合物浆液在倾斜管内的流动特性对堵塞管路的影响。在低温高压可视水合物实验环路上,开展了油基体系下油+天然气的水合物堵管实验,探究了初始压力、初始流量等因素对天然气水合物浆液流动和堵管时间的影响。同时,利用实时在线颗粒测试仪,对水合物生成、流动及堵管过程中水合物颗粒的微观变化进行了分析。结果表明,随着初始压力增大,天然气水合物的诱导时间、生成时间和浆液流动时间均缩短,天然气水合物堵管趋势增大;随着初始流量增大,天然气水合物的诱导时间、生成时间和浆液流动时间均延长,天然气水合物堵管趋势减小。对水合物生成至堵管的过程以及堵塞机理进行了分析。对油基体系下天然气水合物堵塞管路的研究结果表明,在油基体系下可以通过减小初始压力、增大初始流量来有效地减小天然气水合物堵塞管路的概率。研究结果可为维持和保证天然气水合物在管道中的安全流动提供理论参考及依据。
In the multiphase flow pipeline transportation system,in the process of hydrate slurry flow,rugged terrain will be encountered.At this time,the use of inclined pipeline is particularly important.Therefore,the influence of the flow characteristics of gas hydrate slurry in the inclined pipe on the blocked pipeline was studied.The hydrate plugging experiment of oil+natural gas in oil‐based system was carried out on the low‐temperature and high‐pressure visual hydrate experimental loop,and the effects of initial pressure,initial flow and other factors on the flow and plugging time of natural gas hydrate slurry were explored.At the same time,the micro changes of hydrate particles in the process of hydrate formation,flow and pipe plugging were analyzed by real‐time online particle tester.The experimental results show that with the increase of initial pressure,the induction time,formation time and slurry flow time of natural gas hydrate are shortened,and the pipe plugging trend of natural gas hydrate increases.With the increase of initial flow rate,the induction time,formation time and slurry flow time of natural gas hydrate are prolonged,and the pipe plugging trend of natural gas hydrate is reduced.Finally,the process from hydrate formation to pipe plugging and the plugging mechanism were analyzed.The research results of gas hydrate plugging pipelines in oil‐based systems show that the probability of gas hydrates blocking pipelines can be effectively reduced by reducing initial pressure and increasing initial flow rates in oil‐based systems.The research results can provide theoretical reference and basis for maintaining and ensuring the safe flow of natural gas hydrate in pipelines.
作者
潘振
张立贺
郝江涛
朱健
袁松
Pan Zhen;Zhang Lihe;Hao Jiangtao;Zhu Jian;Yuan Song(College of Petroleum Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;Shandong Natural Gas Sales Center of Natural Gas Branch of Sinopec,Ji'nan Shandong 250101,China;Fushun Special Equipment Supervision and Inspection Institute,Fushun Liaoning 113001,China;Fushun Institute of Technological Innovation,Fushun Liaoning 113001,China)
出处
《辽宁石油化工大学学报》
CAS
2022年第5期62-70,共9页
Journal of Liaoning Petrochemical University
基金
辽宁省博士科研启动基金计划项目(2019-BS-159)
辽宁省教育厅科学研究经费项目(L2019024)
辽宁省教育厅重点科研项目(L2020002)
辽宁省教育厅科学研究经费项目(LJKZ0381)。
关键词
天然气水合物
初始压力
初始流量
粒径演变
堵塞机理
Natural gas hydrate
Initial pressure
Initial flow
Particle size evolution
Blocking mechanism
作者简介
潘振(1982-),男,博士,教授,从事天然气综合利用技术研究,E-mail:28335719@qq.com。
