Research Information System
International Journal of Hydrogen Energy, 2025 (SCI-Expanded)
This study investigates the cement integrity of wells in the Caspian Sea and Western Anatolia Region using cement bond logs (CBLs) to evaluate their suitability for underground hydrogen storage (UHS). Depleted oil and gas reservoirs present significant challenges for UHS, particularly the risk of hydrogen leakage behind production casings. A comprehensive analysis of well conditions is essential to assess the feasibility and safety of such operations. The research highlights the importance of advanced sensing technologies for monitoring hydrogen migration, emphasizing temperature changes caused by hydrogen adsorption in overburden formations as a critical indicator of well integrity. Non-isothermal numerical simulations were conducted to analyze temperature variations in a selected case well. The results indicate that temperature changes in a shaly formation, depending on adsorption capacity, ranged from 0.395 °C to 0.541 °C. These variations are detectable with current well-monitoring technologies, supporting the use of temperature-based detection methods for identifying hydrogen migration. The simulations focused solely on hydrogen adsorption effects, excluding interactions between hydrogen and cement or rock. Despite this simplification, the study provides valuable insights into the potential risks and detection strategies for hydrogen leakage in UHS projects. The findings underscore the critical role of well integrity assessments and real-time monitoring systems in ensuring the safety and efficiency of UHS operations, contributing to the global energy transition toward sustainable storage solutions.