Article
Engineering, Civil
Andrew C. Knight, Dylan J. Irvine, Adrian D. Werner
Summary: The study investigates the flow of fresh groundwater within offshore aquifers using 3D synthetic models and compares them with 2D cross-sectional representations in seven real-world cases. The results indicate that alongshore freshwater circulation is influenced by the steepness of the alongshore head gradients, lower onshore heads, and lower hydraulic conductivity of the offshore aquitard. This suggests that in many situations, groundwater flowing from offshore to onshore aquifers may be recirculated freshwater from higher onshore aquifers, rather than relic freshwater as previously thought.
JOURNAL OF HYDROLOGY
(2021)
Article
Multidisciplinary Sciences
Manzar Fawad, Nazmul Haque Mondol
Summary: Geological CO2 storage is crucial for reducing greenhouse gas emissions, with remote monitoring being essential to observe CO2 plume migration. Various monitoring techniques, such as repeated seismic and electromagnetic surveys, can effectively delineate the CO2 plume and estimate gas saturation in subsurface reservoirs. These results have implications for monitoring oil production, hydrocarbon exploration, and identifying freshwater aquifers.
SCIENTIFIC REPORTS
(2021)
Article
Green & Sustainable Science & Technology
Panagiotis Karvounis, Martin J. Blunt
Summary: This study analyzed potential CO2 storage sites in the North Sea to estimate available storage capacity. The results showed tremendous potential for CO2 storage to play a significant role in averting a temperature increase of more than 1.5 degrees C in Europe.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Review
Energy & Fuels
Yongqiang Chen, Ali Saeedi, Quan Xie
Summary: CO2 geological storage is a promising technology to reduce anthropogenic greenhouse gas emissions by injecting CO2 into underground reservoirs. The capillary force plays a crucial role in sealing integrity and the fate of underground CO2, and it is influenced by CO2-brine-rock interactions. This review comprehensively examines both experimental and theoretical investigations to understand the critical role of interfacial interactions in storage integrity of CO2 geological storage.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Xiaofang Shen, Weihong Dong, Yuyu Wan, Fengjun Zhang, Zhijiang Yuan, Qichen Zhang
Summary: This study found that microbial action in deep saline aquifer has a positive influence on CO2 geological storage, increasing the amount of injected CO2 and enhancing CO2 mineral sequestration. Microbes promote dissolution of minerals at the initial stage and accelerate precipitation of carbon-fixing minerals at later stages, improving CO2 storage security.
NATURAL RESOURCES RESEARCH
(2021)
Review
Environmental Sciences
Yinan Cui, Jiajia Bai, Songlin Liao, Shengjiang Cao, Fangzhi Liu
Summary: With the proposal of China's national double carbon strategic goal, carbon capture, utilization and storage (CCUS) technology has gained increasing attention. Due to high cost, high energy consumption, and high risk, CCUS technology is still in the initial stage of development in China. Among them, the risk of CO2 geological storage is one of the challenges, and the environmental monitoring technology of CO2 storage leakage is crucial for the widespread adoption of CCUS technology in China. This paper analyzes the types, mechanisms, and risks of CO2 storage and leakage, and summarizes the existing environmental monitoring technologies. It suggests that China can promote the progress of CO2 geological storage monitoring technology by strengthening research, perfecting risk assessment methods, constructing monitoring technology systems, and standardizing risk response systems.
Article
Energy & Fuels
Jiazheng Qin, Qianhu Zhong, Yong Tang, Zhenhua Rui, Shuai Qiu, Haoyu Chen
Summary: The application of Saline Aquifer CO2 Storage (SACS) projects in offshore saline aquifers in China shows promising potential in terms of technical and economic viability. However, the storage capacities determined by different methods vary significantly. The CO2BLOCK method seems to provide more reasonable results and further confirms the immense potential of industrial-scale pilot and demonstration CO2 storage projects in offshore deep saline aquifers in China.
Article
Water Resources
Li Pu, Pei Xin, Xiayang Yu, Ling Li, D. A. Barry
Summary: Through laboratory experiments and numerical simulations, it was found that cold freshwater recharge performs better in mitigating seawater intrusion compared to hot water, which induces a marked overshoot of salinity distribution.
ADVANCES IN WATER RESOURCES
(2021)
Article
Chemistry, Multidisciplinary
P. G. Haddad, M. Ranchou-Peyruse, M. Guignard, J. Mura, F. Casteran, L. Ronjon-Magand, P. Senechal, M-P Isaure, P. Moonen, G. Hoareau, D. Dequidt, P. Chiquet, G. Caumette, P. Cezac, A. Ranchou-Peyruse
Summary: This study aims to investigate the effect of H2 injection on the interactions between water formation, reservoir rock, gas mixture and microbial ecosystems in underground gas storage. The experimental results suggest that microbial life in deep aquifers plays a significant role in the transformation of H2, especially in relation to sulfate, CO2, calcite, and H2 concentrations in the system.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Geochemistry & Geophysics
Jie Ren, Yuan Wang, Di Feng
Summary: Salt precipitation has a significant impact on the injectivity of CO2 storage in deep saline aquifers during the drying-out process. Gravity and reservoir heterogeneity play important roles in the behavior of CO2 plumes and storage capacities. Numerical simulations based on the Sleipner project have shown that gravity increases solid saturation at the injection well in a homogeneous model, and the position of the injection well affects the amount of salt precipitation near it. The research suggests a mutual resistance relationship between gravity and heterogeneity in terms of their collective effect on solid saturation. Additionally, the study found that gravity reduces salt deposition in fracture models, while increased heterogeneity suppresses salt precipitates production at low CO2 injection rates and increases it at high CO2 injection rates. This research has important guiding significance for designing site screening and injection schemes to avoid excessive salt precipitation and pressure build-up.
Article
Energy & Fuels
Jianqiang Wang, Yong Yuan, Jianwen Chen, Wei Zhang, Jian Zhang, Jie Liang, Yinguo Zhang
Summary: In this study, evaluation indicators were selected to assess the suitability of the Beibu Gulf Basin for carbon dioxide (CO2) geological storage. The results indicated that the basin is suitable for CO2 storage, with high ratings. It is recommended to select target areas with suitable burial depth, superior reservoir conditions, proximity to CO2 collection devices, and a high degree of exploration for CO2 storage, considering techno-economic feasibility.
Article
Water Resources
Ahmad H. Askar, Jeremy T. White, Tissa H. Illangasekare
Summary: This study tests and validates an ensemble-based data-assimilation approach that reduces the uncertainty in the prior knowledge about source settings through conditioning forward transport models using relatively inexpensive easy-to-acquire shallow zone data. The results show that source location uncertainty can be reasonably reduced using shallow zone data, but more prior information about the system and deeper data are essential to estimate a practical probability range for the leakage rate.
ADVANCES IN WATER RESOURCES
(2023)
Article
Green & Sustainable Science & Technology
Jerry Blackford, Katherine Romanak, A. I. Veerle Huvenne, Anna Lichtschlag, James Asa Strong, Guttorm Alendal, Sigrid Eskeland Schutz, Anna Oleynik, J. Dorothy Dankel
Summary: Carbon capture and storage in offshore geological formations has great potential for reducing greenhouse gas emissions, but monitoring for containment failures and natural variability requires a comprehensive baseline assessment. By focusing on key emergent properties of the system rather than exhaustive descriptions, a sufficient baseline can be achieved to support offshore monitoring. Additionally, contemporary comparisons between impacted and non-impacted sites are valuable, but careful validation and understanding of site-specific heterogeneity scales are essential components of a baseline.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Thermodynamics
Hung Vo Thanh, Kang-Kun Lee
Summary: This paper investigates the prediction of CO2 trapping efficiency in deep saline formations using machine learning models including Gaussian process regression (GPR), support vector machine (SVM), and random forest (RF). The results highlight the effectiveness of the GPR model in accurately estimating CO2 trapping performance and achieving good agreement with field observations.
Article
Thermodynamics
A. Carro, R. Chacartegui, C. Ortiz, J. Carneiro, J. A. Becerra
Summary: The use of CO2 as a working fluid in power generation and storage applications has seen significant growth in recent years, with novel combined use of supercritical CO2 cycles showing promise as energy storage systems and for carbon dioxide sequestration. These cycles demonstrate high potential for competitive electric to electric storage efficiencies and costs, while also indicating the possibility of additional CO2 storage. This concept provides an opportunity for energy storage systems, particularly when combined with carbon-intensive industries such as cement or chemicals.
APPLIED THERMAL ENGINEERING
(2021)
