Hydrate Formation and Blockage in Inlet/Outlet and Slope Pipes of Gas-Water-Oil Transportation Pipeline

被引:0
|
作者
Liu, Zheyuan [1 ]
Liu, Xiaoyang [1 ]
Liu, Zaixing [3 ]
Dou, Binlin [1 ]
Liu, Ni [1 ]
Yang, Mingjun [2 ]
Song, Yongchen [2 ]
机构
[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China
[2] Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China
[3] Yanshan Univ, Sch Vehicle & Energy, Qinhuangdao 066004, Peoples R China
关键词
METHANE HYDRATE; KINETICS; DISSOCIATION; RISK;
D O I
10.1021/acs.energyfuels.4c03261
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Hydrate blockage always imposes a common problem in oil and natural gas transportation pipelines. The blockage usually occurs at special locations, such as the inlet and outlet of the pump or the slope sections, which are less likely to be detected and more likely to cause serious consequences. A novel fully visual flow loop was used to study the evolution of hydrate formation and blockage in different parts of the pipeline. The results showed that 50% water cut with low liquid loading has the fastest hydrate formation speed. Hydrate usually gathers in the inlet section with some fluid accumulating, which increases the local pressure drop. The hydrate volume fraction at the inlet is higher than at the outlet, and the difference value gradually increases with time and results in hydrate blockage at the inlet parts. Moreover, the results found the most prone location of hydrate blockage in the slope transition section. The rolling hydrate particles in the slug flow at the upslope will backflow due to the action of gravity. It will collide with the fluid and hydrate particles in the horizontal pipe at the junction of the upslope section. This phenomenon results in a negative pressure drop with hydrate blockage in the slope pipes. In addition, the use of an inhibitor (0.5% PVCap) can reduce the hydrate formation speed by more than seven times and the maximum water conversion rate by more than 30%, which can significantly reduce the risk of hydrate blockage.
引用
收藏
页码:18489 / 18501
页数:13
相关论文
共 42 条
  • [41] Interpretation and modeling of chord length distribution from FBRM results during gas hydrate formation and agglomeration from water-in-oil emulsion
    Herri, Jean-Michel
    Hung LeBa
    Cameirao, Ana
    Darbouret, Myriam
    Peytavy, Jean-Louis
    Glenat, Philippe
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2009, 237
  • [42] A Comparative Study of Turbulence in Stirred Reactors and Pipelines for a Sour Gas-Oil-Water System, Used in Hydrate Formation Predictions and Flow Assurance Considerations
    Sadeghi, Mehdi
    Rizi, Zahra Taheri
    Mohammad-Taheri, Mahboobeh
    Tohidi, Bahman
    SPE JOURNAL, 2023, 28 (03): : 1387 - 1398