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<p>Significant corrosion damage was observed on the external surface of shale gas production tubing, which brings serious safety risk to shale gas production and operation. Analysis of historical failure data reveals that over 80% of integrity incidents in surface engineering systems involve localized corrosion, while wellbore-related failures remain comparatively infrequent. To elucidate the cause of corrosion damage of shale gas tubing and underlying corrosion mechanisms, this study conducted a comprehensive analysis of a failed tubing specimen through advanced material characterization techniques, focusing on the synergistic effects of environmental factors. The results showed that the chemical composition and physicochemical properties of the tubing met the requirements of API Spec 5CT standard. The main cause of local corrosion damage of tubing was through competitive adsorption of dissolved O<sub>2</sub> and CO<sub>2</sub> at defect sites. Meanwhile, the Cl<sup>−</sup> ions assisted anodic dissolution.</p>

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Corrosion Damage Cause for the P110 Tubing of a Shale Gas Platform

  • 期刊论文

  • 发表日期：

    2025年9月20日

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  • Jufeng Huang,
  • Wenxu Zhu,
  • Hao Chen,
  • Juntao Yuan,
  • Anqing Fu

摘要

Significant corrosion damage was observed on the external surface of shale gas production tubing, which brings serious safety risk to shale gas production and operation. Analysis of historical failure data reveals that over 80% of integrity incidents in surface engineering systems involve localized corrosion, while wellbore-related failures remain comparatively infrequent. To elucidate the cause of corrosion damage of shale gas tubing and underlying corrosion mechanisms, this study conducted a comprehensive analysis of a failed tubing specimen through advanced material characterization techniques, focusing on the synergistic effects of environmental factors. The results showed that the chemical composition and physicochemical properties of the tubing met the requirements of API Spec 5CT standard. The main cause of local corrosion damage of tubing was through competitive adsorption of dissolved O2 and CO2 at defect sites. Meanwhile, the Cl− ions assisted anodic dissolution.