PSI - Issue 80

G. Mubarak et al. / Procedia Structural Integrity 80 (2026) 157–168 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

166 10

Figure 9: Iron carbonate scaling temperatures, local temperatures, and scale dissolution tendencies versus pipe length for the first 30 days of the well’s production

Figure 10: Mises stress for the corroded pipe under internal pressure and its own weight axial force.

5. Conclusions This study concludes that the J55 tubing failure at the subject well was mainly due to chloride- accelerated CO₂ corrosion, which reduced wall thickness to a point where it could no longer withstand longitudinal stress, leading to ductile overload. Pitting corrosion simulations showed higher rates in the first 30 days, driv en by higher CO₂ partial pressure, lower pH, and greater water production causing increased flow velocity and wall shear stress. Integrating these simulations with targeted inspection and corrosion inhibition strategies can help identify high-risk areas, especially where FeCO₃ scale is compromised, enabling more efficient resource allocation and improving system reliability and safety.