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<p>Sustained annular pressure (SAP) is a primary indicator and hazard of wellbore integrity failure, commonly observed in deep oil and gas wells, gas storage injection/production wells, CCUS wells, and shale gas horizontal wells. The wellbores with SAP are faced with significant well control risks, primarily manifested as high-pressure fluid leakage, secondary risks during well interventions, and challenges in post-event remediation. To handle these risks, advancements have been made in barrier enhancement and pressure management technologies, annular pressure detection and identification techniques, and safety control strategies. These developments enable scientific prevention, real-time monitoring, quantitative detection, and effective control of SCP. However, gaps remain in the integration of simulation, evaluation, and control capabilities within industrial simulation software for SCP scenarios. Challenges also persist in sealing wellbore leaks, including high injection difficulty, low pressure-bearing capacity, and unsatisfactory remediation outcomes. It is recommended to develop industrial simulation software, innovate new materials, techniques, and equipment, and conduct scientific evaluations of SCP wellbore service safety. These efforts aim to overcome wellbore leakage management challenges under various engineering contexts.</p>

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Safety Risk Analysis of Well Control for Wellbore with Sustained Annular Pressure and Prospects for Technological Development

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Yinghua Jing,
  • Tianbo Wang,
  • Bo Zhang,
  • Yushan Zheng,
  • Xuefeng Li,
  • Nu Lu

摘要

Sustained annular pressure (SAP) is a primary indicator and hazard of wellbore integrity failure, commonly observed in deep oil and gas wells, gas storage injection/production wells, CCUS wells, and shale gas horizontal wells. The wellbores with SAP are faced with significant well control risks, primarily manifested as high-pressure fluid leakage, secondary risks during well interventions, and challenges in post-event remediation. To handle these risks, advancements have been made in barrier enhancement and pressure management technologies, annular pressure detection and identification techniques, and safety control strategies. These developments enable scientific prevention, real-time monitoring, quantitative detection, and effective control of SCP. However, gaps remain in the integration of simulation, evaluation, and control capabilities within industrial simulation software for SCP scenarios. Challenges also persist in sealing wellbore leaks, including high injection difficulty, low pressure-bearing capacity, and unsatisfactory remediation outcomes. It is recommended to develop industrial simulation software, innovate new materials, techniques, and equipment, and conduct scientific evaluations of SCP wellbore service safety. These efforts aim to overcome wellbore leakage management challenges under various engineering contexts.