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Actual annulus geometry is irregular in deepwater due to the geological and engineering factors. The hydrodynamic characteristics of displacement fluid in irregular annulus can reveal expansion or contraction structure influence on displacement efficiency mechanisms. The main purpose in this work is to reveal the hydrodynamic characteristics of Newtonian fluid in irregular annulus, including flow field characteristics and vortex properties based on Detached Eddy Simulation (DES) method by Computational Fluid Dynamics (CFD). The recirculation zone caused by expansion and contraction structure is crucial to cementation quality in deepwater, and the backward facing-step can lead poor displacement efficiency than forward facing-step.

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Research on Hydrodynamic Characteristics of Displacing Fluid in Irregular Annulus in Deepwater

  • 会议论文

  • 发表日期：

    2025年

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  • Yi-su Zhou,
  • Ya-jie Zheng,
  • Ming-he Zhang,
  • Huai-wen Zhang,
  • Le Jiang,
  • Jun-peng Li,
  • Si-da Cheng,
  • Rui Zheng,
  • Yong Li

摘要

Actual annulus geometry is irregular in deepwater due to the geological and engineering factors. The hydrodynamic characteristics of displacement fluid in irregular annulus can reveal expansion or contraction structure influence on displacement efficiency mechanisms. The main purpose in this work is to reveal the hydrodynamic characteristics of Newtonian fluid in irregular annulus, including flow field characteristics and vortex properties based on Detached Eddy Simulation (DES) method by Computational Fluid Dynamics (CFD). The recirculation zone caused by expansion and contraction structure is crucial to cementation quality in deepwater, and the backward facing-step can lead poor displacement efficiency than forward facing-step.