|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||Composition and Morphology of C1018 Carbon Steel Coupons Retrieved from High Temperature Water Injection Well
||Mohammad H. Haque, Rajesh K. Saini, Khaled Al-Muhammadi, Ahmed Bukhamseen
|On-Site Speaker (Planned)
||Mohammad H. Haque
Formation of sulfide (FeS), oxides (FeO, Fe2O3, Fe3O4) and/or carbonates (FeCO3) of iron during corrosion of tubing materials in a water well is a common phenomenon. Composition of water, tubing metallurgy, pressure, temperature and fluid flow velocity influence such formation impacting the mechanical integrity of the well-tubing. A downhole coupon holder containing two low carbon steel (C1018) flat metal coupons has been deployed in a water injection well (80 °C) for three months to evaluate the metallurgy. Change in weight, surface profilometry, scanning electron microscopy and X-ray fluorescence spectroscopy techniques were used to characterize the retrieved coupons. Embrittlement and cracking as well as uniform surface corrosion were observed due to low water pH and presence of H2S. Pits were randomly initiated from the pre-formed holes edges under stress causing severe stress cracking. Detailed coupons study has enabled a better understanding of the downhole damages supporting an effective corrosion mitigation strategy.