Doguhan Barlas Sevindik , Oluwafemi Precious Oyenowo , Ryosuke Okuno , Muhammad Farooq Zia , Bo Zhang
{"title":"Corrosion control in carbon storage by injection of sodium formate solution","authors":"Doguhan Barlas Sevindik , Oluwafemi Precious Oyenowo , Ryosuke Okuno , Muhammad Farooq Zia , Bo Zhang","doi":"10.1016/j.ijggc.2025.104521","DOIUrl":"10.1016/j.ijggc.2025.104521","url":null,"abstract":"<div><div>Carbon dioxide (CO<sub>2</sub>) leakage presents a significant risk to carbon storage in saline aquifers. Buoyant forces can cause CO<sub>2</sub> in resident brine to migrate into overlying formations through faults, fractures, or existing wells. Wells are especially prone to leakage because CO<sub>2</sub> produces an acidic environment, as recently observed in the Illinois Basin Decatur Project (IBDP). This study was motivated by the question of how to mitigate the risk of leakage caused by corrosion in well tubulars.</div><div>This research, for the first time, explores the use of sodium formate solution as a corrosion control method based on an IBDP geological model. To evaluate its effectiveness, reactive transport simulations of CO₂ and sodium formate solution injection were performed using the IBDP model. The simulation cases tested different injection rates (80 and 640 m³/d) and concentrations (5 and 15 wt.%), which resulted in varying amounts of sodium formate being injected. Both pre-flush and post-flush injection strategies were considered.</div><div>Results indicated that in the pre-flush scenarios, formate can effectively be dispersed by the subsequently injected CO<sub>2</sub> (e.g., 150 to 350 meters from the well), while raising the pH above 4.5. However, to mitigate pH reduction near the injector, formate does not need to disperse widely; the scenario involving approximately 2.5 × 10<sup>3</sup> tonnes of sodium formate resulted in an average pH of 4.45 with a standard deviation of 0.27 along the injection well for 25 years, remaining safely above 4.0, which is the recommended pH range for corrosion control of 13 chrome steel pipe.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104521"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Numerical simulation of viscous fingering in CO₂ storage: Addressing the limitations of laboratory-derived relative permeabilities","authors":"S.A. Larki , A. Skauge , K.S. Sorbie , E.J. Mackay","doi":"10.1016/j.ijggc.2025.104523","DOIUrl":"10.1016/j.ijggc.2025.104523","url":null,"abstract":"<div><div>Gas injection in CCS is an unstable displacement process due to the viscosity contrast between injected gas and in-situ brine, a fact often overlooked in CO₂ storage modelling. Most studies estimating relative permeability (Relperms) for CCS rely on conventional methods. This paper applies a novel approach that explicitly considers viscous instability from injecting low-viscosity gas into more viscous brine. Based on our earlier studies (A. Beteta et al., 2024; Sorbie et al., 2020). viscous fingering is expected under viscous-dominated conditions. While strong capillary forces may suppress fingering at lab scale, the balance of viscous and capillary forces can shift at field scale, leading to pronounced gas fingering.</div><div>To model CO₂ injection, we used published CO₂/water Relperms from CCS experiments. Two approaches were compared: conventional Relperms estimation and an alternative viscous fingering-based method. Simulations using conventional CO₂/water Relperms showed no fingering patterns, whereas our earlier study indicated that core flood experiments with a water–CO₂ viscosity ratio of ∼55 may generate gas fingers. The second approach, based on maximum mobility, produced gas fingers and matched production and differential pressure equally well.</div><div>This apparent absence of fingering may suggest limitations in the conventional representation of flow dynamics under such conditions. Possible reasons why experimental relative permeabilities do not capture the expected “fingering behaviour” are discussed in this paper. The main difference between our proposed Relperms and lab derived Relperms is in the total mobility, with our Relperms having a higher total mobility at the shock front gas saturations (S<sub>gf</sub>) of CO<sub>2</sub>.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104523"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Nooraiepour , Karol M. Dąbrowski , Mohammad Masoudi , Szymon Kuczyński , Zezhang Song , Ane Elisabet Lothe , Helge Hellevang
{"title":"Geological CO2 storage assessment in emerging CCS regions: Review of sequestration potential, policy development, and socio-economic factors in Poland","authors":"Mohammad Nooraiepour , Karol M. Dąbrowski , Mohammad Masoudi , Szymon Kuczyński , Zezhang Song , Ane Elisabet Lothe , Helge Hellevang","doi":"10.1016/j.ijggc.2025.104524","DOIUrl":"10.1016/j.ijggc.2025.104524","url":null,"abstract":"<div><div>Emerging carbon capture and storage (CCS) markets face critical challenges in developing systematic methodologies to assess geological CO<sub>2</sub> storage potential under conditions of limited data availability, evolving regulatory frameworks, and nascent infrastructure development. This study establishes an integrated assessment framework for lower-maturity CCS regions that combines geological characterization, storage capacity assessment, regulatory analysis, and socio-economic evaluation through a structured approach adaptable to diverse global contexts. Poland serves as a representative case study, with its coal-reliant economy exemplifying the decarbonization challenges facing emerging regions while meeting European Union climate mandates, and its geological setting offering substantial sequestration opportunities across three major sedimentary regions. Through multidisciplinary analysis synthesizing scattered geological data, policy developments, CCUS value chain dynamics, and stakeholder perspectives, we systematically evaluate CO<sub>2</sub> storage potential and demonstrate framework application. Analysis reveals that onshore saline aquifers and depleted hydrocarbon fields provide significant storage capacity, while offshore Baltic Basin sites face logistical and environmental regulatory constraints. Current assessments encounter limitations including sparse data, restricted research access, and inadequate industry-academia collaboration, preventing basin-scale analyses from advancing to higher storage readiness levels and undermining business decision-making reliability. This study contributes a replicable methodology extending beyond Poland to lower-maturity CCS regions worldwide, providing decision-makers with tools for storage assessment, policy development, and stakeholder engagement that support evidence-based deployment strategies. Success in emerging markets requires coordinated advancement across technical characterization, regulatory clarity, infrastructure development, and public engagement, with transparent governance and inclusive community participation as critical enablers for sustainable CCS implementation.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104524"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lee J. Hosking , Yazeed A. Al-Noaimat , Xiangming Zhou , Renato Zagorscak , Steven Benbow , Richard Metcalfe
{"title":"Numerical sensitivity analysis of cement sheath bond integrity for CO2 injection wells under pressure and thermal loading","authors":"Lee J. Hosking , Yazeed A. Al-Noaimat , Xiangming Zhou , Renato Zagorscak , Steven Benbow , Richard Metcalfe","doi":"10.1016/j.ijggc.2025.104525","DOIUrl":"10.1016/j.ijggc.2025.104525","url":null,"abstract":"<div><div>This paper presents a numerical analysis of CO₂ injection well integrity, focusing on degradation of cement sheath bonds with the casing and caprock. The cement sheath and caprock are modelled as thermo-poroelastic materials subject to coupled thermal, hydraulic, and mechanical behaviour. Debonding at the cement-casing and cement-formation interfaces is explicitly modelled in the finite element formulation using a cohesive zone model. A mixed-mode traction-separation failure criterion is employed to capture progressive failure under tension and shear. 144 simulation scenarios are considered for practical ranges of CO₂ injection pressure (15–23 MPa) and temperature (0–15 °C) sustained for 30 days in a well system at 1.5 km depth. Predictions are compared based on the timeframe of damage development and the apertures of any resulting microannuli. For the system studied, CO₂ injection conditions align with the ‘window’ of damage initiation and development at the cement-casing interface, whilst no damage is predicted at the cement-formation interface. Thermal loading has a greater influence on damage development than pressure loading, with lower injection pressures and temperatures producing earlier damage onset and larger microannulus apertures. Higher injection pressures somewhat mitigate damage by counteracting thermal contraction of the system, although this pressure effect would be less pronounced for a real well completion considering the injection tubing and A-annulus fluid. Once initiated, damage develops rapidly and has typically fully evolved within one day. These findings contribute to robust CO₂ storage risk assessments and support planning of corrective measures to ensure long-term wellbore integrity during geological CO₂ storage.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104525"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hyeonseok Lee , Paul E. Kim , Shaowen Mao , Shuojia Fu , Axel P. Indro , Seunghwan Baek , Nate Mitchell , Mohamed Mehana
{"title":"Deep learning model for fast, science-based forecasting of fluid migration along faults in geologic carbon storage scenarios","authors":"Hyeonseok Lee , Paul E. Kim , Shaowen Mao , Shuojia Fu , Axel P. Indro , Seunghwan Baek , Nate Mitchell , Mohamed Mehana","doi":"10.1016/j.ijggc.2025.104518","DOIUrl":"10.1016/j.ijggc.2025.104518","url":null,"abstract":"<div><div>Effective long-term geologic storage depends on robust site selection and credible, science-based forecasting of subsurface behavior to ensure storage integrity. We develop a deep learning–based reduced-order model (ROM) to quantify potential carbon dioxide (CO₂) and brine migration through geological faults. The ROM combines a Transformer model for binary classification and a Stacked Ensemble for regression, trained on a comprehensive dataset generated from 1400 physics-based reservoir simulations. Key geologic and operational parameters—including fault geometry, reservoir structure, and injection conditions—were systematically varied to capture a wide range of fluid migration scenarios. The ROM accurately predicts the onset of migration, cumulative migration volumes of both CO₂ and brine, and associated migration rates, as compared to an independent set of validation simulations, while significantly reducing computational cost compared to traditional simulation methods. Model performance was evaluated across diverse fault configurations, revealing that shallow reservoir geometry and fault angle are among the most influential factors governing migration behavior. Sensitivity analysis using SHapley Additive exPlanations (SHAP) provided interpretability, revealing distinct patterns in how geological and operational features drive transient versus cumulative migration outcomes. The ROM’s ability to rapidly simulate fault migration scenarios enables efficient sensitivity analyses, scenario evaluations, and decision support for site selection and monitoring design. This approach enhances the safety, scalability, and long-term operational performance of geologic carbon storage (GCS) systems by providing a robust, interpretable tool for predicting subsurface fluid migration and assessing fault-related migration potential.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104518"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Erik van Ooijen , Abraham Passmore , Joanne Myers , Andrew Ross
{"title":"Applications of chemical monitoring technologies for sub-sea CCS; Sensor assessment, baseline measurement and natural variability","authors":"Erik van Ooijen , Abraham Passmore , Joanne Myers , Andrew Ross","doi":"10.1016/j.ijggc.2025.104516","DOIUrl":"10.1016/j.ijggc.2025.104516","url":null,"abstract":"<div><div>Sub-sea carbon dioxide (CO<sub>2</sub>) storage on a commercial scale will require baseline measurements and ongoing monitoring of the biochemical signal of the water column above a storage complex to understand natural variation at the injection site and to be able to distinguish this from a potential leak from the storage structure. Here we discuss the performance of a suite of chemical sensors on various platforms and the observed biogeochemical signals within a near-shore dynamic environment in the Bass Strait, Gippsland, Australia. These sensors were deployed on seabed landers, surface moorings, Saildrone unmanned surface vehicle (USV) and a crewed vessel demonstrating reliable and high-quality, near real-time data return. We discuss the baseline signal and natural variability of the biochemical parameters at the study site and its relevance in the context of CCS monitoring.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104516"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shi Yuan Toh, Colin MacBeth, Jorge Landa, Hamed Heidari
{"title":"Exploring 4D seismic potential for monitoring CO2 injection in depleted North Sea gas fields","authors":"Shi Yuan Toh, Colin MacBeth, Jorge Landa, Hamed Heidari","doi":"10.1016/j.ijggc.2025.104529","DOIUrl":"10.1016/j.ijggc.2025.104529","url":null,"abstract":"<div><div>Carbon capture and storage (CCS) is crucial for meeting global CO<sub>2</sub> emissions reduction targets. Monitoring, measurement, and verification (MMV) plans are essential for the effective management of CO<sub>2</sub> storage sites, with 4D seismic data playing a key role. To aid this understanding, this study presents simulation to seismic modelling (Sim2Seis) case studies for CO<sub>2</sub> injection into depleted gas fields, focusing on the Goldeneye, Hamilton, and Viking fields in the North Sea. Using compositional reservoir flow simulation models, we conduct a forward modelling process to generate synthetic seismic at key time steps such as baseline (pre-CO<sub>2</sub> injection) and at the end of CO<sub>2</sub> injection (post-CO<sub>2</sub> injection). We demonstrate that 4D seismic signals, related to saturation changes, are strong and most visible at fluid contacts, particularly where CO<sub>2</sub>-hydrocarbon gas mixture displaces the aquifer. By contrast, intra-reservoir signals arise primarily from fluid compositional changes with only limited contrast in acoustic properties from density and velocity variations. These findings suggest that 4D seismic is better suited for containment monitoring and leakage detection than conformance monitoring. They also highlight the need for tailored strategies based on compositional reservoir flow simulation models. Continued research into fluid flow physics and seismic interpretation is critical to optimizing monitoring strategies for CO<sub>2</sub> storage in depleted gas fields.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104529"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessment of carbon dioxide quality from industrial point sources for carbon utilization","authors":"Tuula Kajolinna , Siarhei Balshakou , Joonas Mustonen","doi":"10.1016/j.ijggc.2025.104527","DOIUrl":"10.1016/j.ijggc.2025.104527","url":null,"abstract":"<div><div>Carbon dioxide (CO<sub>2</sub>) is increasingly viewed not only as a climate liability but also as a potential feedstock in circular carbon strategies. However, its practical utilization critically depends on both its chemical composition – including application-specific impurity tolerances – and its origin, whether fossil-based or biogenic. This study presents a comprehensive compositional assessment of CO<sub>2</sub>-rich streams from twelve industrial point sources in Finland, with a special focus on biogas upgrading facilities employing diverse purification technologies (membrane separation, water/amine scrubbing, pressure swing absorption (PSA)). Using Fourier Transform Infrared (FTIR), gas chromatograph (GC), adsorption tubes and biogenicity analysis, key impurities affecting downstream suitability for five major applications –food, medical, fuel synthesis, greenhouse use, and permanent storage – were identified, along with the assessment of biogenicity of streams.</div><div>The results indicate that measured membrane-based upgrading plants provided the most suitable CO<sub>2</sub> quality (95.9–97.3 vol-%) for high-purity applications, including the food and beverage industry, medicinal use, and chemical production. This stream requires only limited removal of residual moisture, nitrogen, and oxygen, although elevated concentrations of methane and hydrogen remain a challenge. In contrast, amine scrubbing and PSA processes exhibited higher impurity levels, particularly hydrogen sulfide and volatile organic compounds. Nevertheless, CO<sub>2</sub>-rich off-gas streams from biogas upgrading plants can be directly applied to greenhouse enrichment and concrete curing when appropriate dilutions are performed. Biogenicity values of almost 100 % modern <sup>14</sup>C for biogas plants confirm that these CO<sub>2</sub> streams originate fully from renewable sources, which is critical for regulatory compliance and carbon accounting.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104527"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rasesh Pokharel , Guangnan Wu , Peter Kraal , Jasper Griffioen , Joris Dijkstra , Gert-Jan Reichart , Helen E. King
{"title":"Viability of commercial olivine mixtures for enhanced weathering in seawater: Dissolution kinetics, CO2 sequestration, and metal release assessment","authors":"Rasesh Pokharel , Guangnan Wu , Peter Kraal , Jasper Griffioen , Joris Dijkstra , Gert-Jan Reichart , Helen E. King","doi":"10.1016/j.ijggc.2025.104522","DOIUrl":"10.1016/j.ijggc.2025.104522","url":null,"abstract":"<div><div>Enhanced silicate weathering (ESW) shows promise in converting atmospheric CO<sub>2</sub> into inorganic carbonates via mineral weathering. This study investigates the potential of utilizing olivine containing mineral mixtures from waste rock and tailings (olivine purity ∼ 55% and mean particle size ∼ 39 µm) for ESW in seawater. A decrease in olivine weathering rate over time was observed in the form of diminishing Mg release rates due to the formation of passivating layers at the mineral surface. Quantitative mineralogical analysis revealed a reduction in the olivine percentage (up to 8.6%) in the reacted mineral mixture indicating a reaction that results in CO<sub>2</sub> sequestration. However, there was also simultaneous precipitation of 2:1 layer silicates and a possible amorphous clay mineral (a CO<sub>2</sub>-releasing process known as reverse weathering). The highest deployed material dosages released significant amounts of nickel (Ni) and cobalt (Co) into the solution, emphasizing the need for careful consideration in large-scale ESW deployment. The CO<sub>2</sub> sequestration rate measured at 90 days of the olivine-mineral mixture was calculated to be 3.80 × 10<sup>−12</sup> mol CO<sub>2</sub> m<sup>−2</sup> s<sup>−1</sup>, equating to 14.43 kg of CO<sub>2</sub> sequestered per ton of olivine-mineral mixture per year. As rates decline non-linearly, this value reflects short-term kinetics, highlighting the need for Monitoring Reporting and Verification (MRV) based on windowed rates and cumulative uptake. These findings suggest that olivine containing mineral mixtures from mine waste and tailings represent a durable carbon storage, characterized by high early fluxes that decline over time, with material dosage critical for efficiency and metal risks.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104522"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Frederick Pessu , Alice Macente , Olujide Sanni , Sandra Piazolo
{"title":"The importance of whole system considerations for sustainable, long-term CO2 injection and storage: Interplay between infrastructure-related corrosion and reservoir rock chemistry effects on the evolution of the CO2 storage capacity","authors":"Frederick Pessu , Alice Macente , Olujide Sanni , Sandra Piazolo","doi":"10.1016/j.ijggc.2025.104520","DOIUrl":"10.1016/j.ijggc.2025.104520","url":null,"abstract":"<div><div>As global emissions fail to reduce rapidly, Carbon Capture and Storage (CCS) is attracting ever-growing attention. CCS involves capturing, treating, transporting and storing CO<sub>2</sub> to ensure its long-term removal from the atmosphere. To design a viable CCS system, the different interactions and impacts of injected CO<sub>2</sub> (either as sub-critical or supercritical fluid) across the whole CCS system need to be considered. However, it is unclear how changes in fluid chemistry and the pre-existing reservoir rock chemistry influence the evolution of the two key storage properties, porosity and permeability.</div><div>This study investigates how upstream corrosion-induced fluid chemistry changes and realistic rock composition could affect the injectivity and storage capacity of reservoirs. The condition and material chosen for this project fall into the possible envelope of conditions of interest during CO<sub>2</sub> injection and storage. Corrosion occurring during CO<sub>2</sub> injection through saline aquifers was simulated at 40 bar, 60°C for two weeks, using X65 carbon and <sup>13</sup>Cr steel. The fluid resulting from the experimental fluid-metal interaction was then reacted at ∼40 bar, 60°C for another two weeks with two fine-grained arkoses, with and without lithic clast, representative of siliciclastic reservoir rocks.</div><div>Results show that upstream corrosion caused a change in fluid chemistry and decreased fluid acidity. The corrosion-induced chemical changes had a marked effect on the evolution of porosity and permeability within the reservoir rocks. The storage capacity of reservoir rocks with diverse mineralogy is highly dynamic, and directly affected by rock chemical composition and, importantly, the chemical evolution of the incoming fluid.</div></div>","PeriodicalId":334,"journal":{"name":"International Journal of Greenhouse Gas Control","volume":"148 ","pages":"Article 104520"},"PeriodicalIF":5.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145526748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}