石油化工高等学校学报

石油化工高等学校学报 ›› 2022, Vol. 35 ›› Issue (3): 75-80.DOI: 10.3969/j.issn.1006-396X.2022.03.012

• 石油工程 • 上一篇    

潮水流速对钻井隔水导管入孔影响的有限元分析

隋成龙1(), 林家昱1, 李进1, 尉文平2, 李留伟3   

  1. 1.中海石油(中国)有限公司 天津分公司, 天津 300459
    2.中海石油能源发展股份有限公司 工程技术分公司, 天津 300452
    3.洲际海峡能源科技有限公司, 北京 100088
  • 收稿日期:2021-05-19 修回日期:2022-01-05 出版日期:2022-06-25 发布日期:2022-07-25
  • 作者简介:隋成龙(1988⁃),男,工程师,从事海洋石油钻井技术方面研究;E⁃mail:suichl2@cnooc.com.cn
  • 基金资助:
    中海石油(中国)有限公司科技项目“渤海油田3 000万吨持续稳产关键技术研究”子课题“渤海边际油田高效开发钻完井配套技术”(CNOOC?KJ135 ZDXM 36 TJ06TJ)

Finite Element Analysis of the Influence of Tide Velocity on the Borehole Entering of Drilling Riser

Chenglong Sui1(), Jiayu Lin1, Jin Li1, Wenping Yu2, Liuwei Li3   

  1. 1.Tianjin Branch of CNOOC (China) Limited,Tianjin 300459,China
    2.CNOOC Energy Technology & Service Ltd. Supervision & Technology Co. ,Tianjin 300452,China
    3.Intercontinental Energy Technology Co. ,Ltd. ,Beijing 100088,China
  • Received:2021-05-19 Revised:2022-01-05 Online:2022-06-25 Published:2022-07-25

摘要:

在钻完导管段后下隔水导管时,受潮水流速的影响,若潮水流速较大则会导致隔水导管入孔困难。通过有限元分析软件ADINA,建立了流体?海水与固体?套管相互作用的流固耦合有限元模型。经过分析可知,潮水流速越大,导管入孔时最终平衡状态下的横向偏移量越大;由于隔水导管的阻流作用,靠近导管前端潮水产生很强的绕流,导管后端附近区域产生局部涡流;在4种潮水流速(0.60、0.70、0.80、0.90 m/s)下,雷诺数及当量绕流阻力系数均处于合理区间;当钻井井眼扩径后井径为889.0 mm、下入508.0 mm隔水导管时,在潮水流速小于0.59 m/s时,不会发生遇阻现象;在潮水流速大于0.83 m/s时,会出现入孔困难现象。因此,建议潮水流速下降至0.59 m/s以下再下入隔水导管。模拟分析结果对海上油田钻入法下隔水导管具有较好的指导意义。

关键词: 隔水导管, 流速, 入孔, 固液耦合, 有限元

Abstract:

A high tide velocity makes it difficult for the riser to enter the borehole during its running after the riser section is drilled. A finite?element fluid?solid coupling model of fluid (seawater) and solid (casing) interaction is built with the finite?element analysis software ADINA. The following observations can be made from the analysis. A higher velocity results in a larger lateral offset in the final equilibrium state when the riser enters the borehole.Due to the flow blocking effect of the riser, seawater near the front end of the riser produces a strong detouring flow, while a local vortex is observed in the area near the back end of the riser.Under four working conditions of different tide velocities (0.60,0.70,0.80 and 0.90 m/s), both the Reynolds number and the equivalent flow resistance coefficient are in reasonable ranges.When the borehole diameter reaches 889.0 mm after borehole enlargement, a 508.0 mm riser is run in. No obstruction is encountered when the tide velocity is less than 0.59 m/s, whereas difficult borehole entering occurs when the tide velocity is higher than 0.83 m/s. It is suggested that the riser will be run in when the tide velocity reduces to below 0.59 m/s. The simulation analysis has a great guiding significance for the running of the riser during the drilling of offshore oil fields.

Key words: Riser, Velocity, Borehole entering, Solid?liquid coupling, Finite element

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