起伏地形下油气管道水合物生成规律研究  

Study on the generation law of hydrates in oil and gas pipelines under undulating terrain

作　　者：吴松[1] 申菲 郝磊 崔会璀 WU Song;SHEN Fei;HAO Lei;CUI Huicui(China National Petroleum Corporation Jidong Oilfield Branch,Tangshan 063200,Hebei,China)

机构地区：[1]中国石油天然气股份有限公司冀东油田分公司,河北唐山063200

出　　处：《能源化工》2024年第1期38-42,共5页Energy Chemical Industry

基　　金：中石油科技发展创新项目(编号:202208B052)。

摘　　要：针对油气水混输在一定条件下会生成天然气水合物的问题,采用OLGA建立了某爬坡油气水混输管道流动模型,分析了开发前期、中期、后期生产变化,研究了水合物的生成规律。结果表明,随着天然气流量的增大,管道内天然气水合物体积分数峰值降低。长庆油田该区块前期产量较大,应主要在管道出口位置设置水合物解堵设施,而在开发后期产量下降后,应注意在翻越高点、低洼处附近设置水合物解堵设施。随着气液比的增大,管道内水合物体积分数明显增加,在气液比为140∶1时,管道里程5812 m处水合物体积分数达到最大峰值17%,应注意此时管道低洼处的水合物积聚问题,提前采取加热等措施防止水合物堵塞造成生产事故。In response to the problem of natural gas hydrates will be generated in the mixed transportation of oil,gas and water,the flow model of a climbing oil-gas-water mixed pipeline is established by using OLGA,and the production changes in the early,middle and later stages of development are considered to study the formation law of hydrates.The results show that with the increase of natural gas flow rate,the peak volume fraction of gas hydrate in the pipeline decreases.In the block of Changqing Oilfield,the production is relatively large in the early stage,and hydrate unblocking facilities should be mainly installed at the pipeline outlet position.After the production declines in the later stage of development,attention should be paid to setting up hydrate unblocking facilities near the high and the low-lying place.As the gas-liquid ratio increases,the hydrate volume fraction in the pipeline increases significantly.When the gas-liquid ratio is 140∶1,the volume fraction of hydrates reach the maximum peak of 17%at the pipeline mileage of 5812 m.At this time,attention should be paid to the low-lying part of the pipeline for the problem of hydrate accumulation,and measures such as heating should be taken in advance to prevent production accidents caused by hydrates blockage.

关 键 词：油气水 管道 水合物 体积分数 生成速率 

分 类 号：TE832[石油与天然气工程—油气储运工程]