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中国工业与应用数学学会会刊
主管：中华人民共和国教育部
主办：西安交通大学
ISSN 1005-3085  CN 61-1269/O1
工程数学学报

工程数学学报 ›› 2022, Vol. 39 ›› Issue (3): 341-356.doi: 10.3969/j.issn.1005-3085.2022.03.001

• •    下一篇

双层连续管固态流化开采水合物的内管分析

杨  雁1,   白建超2,   王国荣3,   蔡明杰3,   毛良杰3   

  1. 1. 西南石油大学理学院，成都 610500
    2. 宜宾学院理学部，宜宾 644000
    3. 西南石油大学油气藏地质及开发工程国家重点实验室，成都 610500
  • 出版日期:2022-06-15 发布日期:2022-08-15
  • 基金资助:
    国家重点研发计划项目 (2018YFC0310201; 2019YFC0312303).

Analysis of Solid Fluidized Hydrate Production in Double-layer Continuous Tube

YANG Yan1,   BAI Jianchao2,   WANG Guorong3,   CAI Mingjie3,   MAO Liangjie3   

  1. 1. School of Sciences, Southwest Petroleum University, Chengdu 610500  
    2. Ministry of Science, Yibin University, Yibin 644000  
    3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500
  • Online:2022-06-15 Published:2022-08-15
  • Supported by:
    The National Key Research and Development Program (2018YFC0310201; 2019YFC0312303).

PDF (PC)

177

摘要：

为研究双层连续管内管举升水合物的井筒多相流动规律，建立了采用双层连续管固态流化开采天然气水合物的井筒多相流动模型，采用有限差分法对模型进行求解。基于以上模型，对南海某实例井采用双层连续管固态流化开采天然气水合物的井筒多相流动行为进行了模拟。研究结果表明，随着流体上升，双层连续管内管温度和压力逐渐降低；在海底 1 600 米至 700 米时，固相含量以及液相含量相对稳定，含气率为 0；当流体上升至 700 多米的高度时，固相水合物开始逐渐分解。当钻井液密度与排量过高或者过低，都会使得井底压力脱离安全窗口，威胁到井控安全。因此，合理地选用钻井参数，对确保井控安全尤为重要。

关键词: 双层连续管, 固态流化, 多相流, 水合物, 井控安全

Abstract:

In order to study the multi-phase wellbore flow law of the two-layer continuous tube lift hydrate, a multi-phase wellbore flow model using the two-layer continuous tube solid fluidization was established in this paper, and the model was solved by the finite difference method. Based on the above model, the multi-phase wellbore flow behavior of gas hydrate production in a case well in the South China Sea using solid fluidization of two-layer continuous pipe was simulated. The results show that the solid phase content and liquid phase content are relatively stable and the gas content is 0 when the fluid rises to a height of more than 700 meters. When the fluid rises to a height more than 700 meters, the solid phase hydrate begins to decompose gradually. When the density and displacement of drilling fluid are too high or too low, the bottomhole pressure will escape from the safety window and threaten the safety of well control. Therefore, the reasonable selection of drilling parameters is particularly important for ensuring well control safety.

Key words: double-layer continuous pipe, solid fluidization, multiphase flow, hydrates, well control safety

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