Session: Material Selection and Qualification in CCS Downhole Environment (Part II of II)
Material Qualification and Laboratory Assessment for Pipeline and Well Tubing in CO₂-Rich CCS Environments (C2026-00009)
Thursday, March 19, 2026
3:00 PM - 3:30 PM Central
Location: 342 DE
Earn .5 PDH
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PTT Exploration and Production Public Company Limited
This paper presents a comprehensive evaluation of material performance for CO₂ injection wells and pipelines in depleted reservoir CCS systems, focusing on the effects of oxygen impurities that heighten corrosion risk. The objective is to identify cost-effective alternatives to high-end Corrosion-Resistant Alloys (CRAs), while addressing the unique challenges of CCS operations compared to conventional oil and gas environments. A targeted literature review guided the selection of representative test temperatures and conditions. Laboratory testing included Stress Sulfide Cracking (SSC), Stress Corrosion Cracking (SCC), and galvanic compatibility assessments for well materials. Three CRA material - 25Cr, 17Cr and 13Cr were tested in the well tubing condition. Results showed that while general corrosion was unaffected by oxygen up to 10 ppm, localized corrosion posed a risk for cracking initiation. S13Cr failed the corrosion test, and 17Cr failed the galvanic test—likely influenced by oxygen presence. Additionally, carbon steel pipeline materials were tested under simulated operational conditions. The results showed negligible corrosion rates, indicating suitability for CO₂ transport under the tested parameters. These findings underscore the importance of comprehensive material qualification for both wells and pipelines, offering a practical framework for optimizing material performance, cost, and long-term integrity in CCS projects.
