Session: Material Selection and Qualification in CCS Downhole Environment (Part I of II)
A Critical Assessment of Test Methods for Steel–Cement System Degradation in Geological CO₂ Storage Environments (C2026-00341)
Thursday, March 19, 2026
10:00 AM - 10:30 AM Central
Location: 342 DE
Earn .5 PDH
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Rithuparna Rajesh, Rida-Fatima Mazumder, Yuvaraj Dhandapani, Susan A. Bernal, Joshua Owen, Richard Barker, Evgeny Barmatov
Carbon Capture and Storage (CCS) is one of the viable pathways to achieve net-zero targets. A CCS well infrastructure consists of steel casing surrounded by cement sheaths in a wellbore that will be continuously exposed to chemically aggressive environments at high temperatures and high pressures (HTHP). The integrity of well infrastructure is critical for long-term CO2 storage through major CO2 trapping mechanisms such as mineralisation. The continuous exposure of the injection well to CO2-bearing solutions may cause degradation of the cement sheath due to carbonation, and corrosion of the steel casing, thereby forming leakage pathway for CO2. The lack of standardised test methodologies for durability assessment of steel-cement (S-C) systems hinders the performance-based material selection for CCS injection well infrastructure. This paper presents a critical overview of durability assessment methodologies for S-C systems and the challenges in simulating wellbore conditions, such as HTHP and aggressive chemicals, including impurities present alongside CO2. Studies dealing with corrosion assessment and bond characteristics of S-C interfaces in CCS environments will also be discussed. Limited studies on material degradation highlights the need to evaluate underlying failure mechanisms to develop mechanistic models for accurate material selection in CCS well applications.
