Article
Environmental Sciences
Hamidreza Erfani, Masoud Babaei, Vahid Niasar
Summary: This study investigates the process of CO2 dissolution in deep saline aquifers through numerical simulations, and highlights the importance of considering hydrodynamic dispersion and multispecies geochemical reactions. Results indicate that accounting for hydrodynamic dispersion can increase the CO2 dissolution flux and decrease the convection onset time, while geochemical reactions can enhance long-term efficiency but reduce total sequestered carbon during the diffusion-dominated period. The study emphasizes the significance of realistic geochemical representation and the spatial and temporal dependence of reactions for detailed simulation of the CO2 storage process.
WATER RESOURCES RESEARCH
(2021)
Article
Energy & Fuels
Li Yang, Wang Rui, Qingmin Zhao, Zhaojie Xue, Yinbang Zhou
Summary: A four-scale and three-level CO2 storage potential evaluation method for saline aquifers in a petroliferous basin in China is proposed, considering geological, engineering, and economic factors. The method evaluates theoretical storage capacity, engineering storage capacity, and economic storage capacity, considering factors such as trapping mechanisms, injectivity, storage security pressure, well number, and carbon pricing yield. Application of this method in the Gaoyou sag of the Subei Basin reveals the proportion of different trapping mechanisms and highlights the significant difference between theoretical, engineering, and economic storage capacity.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2023)
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
Environmental Sciences
Roghayeh Khosravi, Mehdi Zarei, Ondra Sracek, Moritz Bigalke
Summary: Groundwater in the coastal aquifers of the Maharlu Lake in southern Iran has been experiencing degradation of quality and increasing salinity. Three major controls of groundwater chemistry in these aquifers have been identified: lake water intrusions, evaporites and carbonate dissolution-precipitation, and organic matter input likely linked to domestic sewage seepage. The intrusion of lake water leads to an increase in concentrations of B, Li, Co, Cr, Cu, Ni, and U in groundwater, while Zn concentrations decrease. Gypsum dissolution and carbonate reactions contribute to the enrichment of B, Co, Cr, Cu, Ni, Zn, and U in groundwater samples. These findings are important for water managers and local authorities to understand the coastal groundwater geochemistry and implement effective mitigation approaches.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Cristina Orecchia, Beatrice M. S. Giambastiani, Nicolas Greggio, Bruno Campo, Enrico Dinelli
Summary: Having an accurate and easily accessible geochemical database is crucial for a correct groundwater management. In this study, chemico-physical data of groundwater collected by different Environmental Protection Agencies in Italy during the year 2018 were integrated into a single database to assess the geochemical status of a wide and complex aquifer system. The results showed that the groundwater was mainly classified as Ca-HCO3 and Ca-Mg-HCO3 types, with the presence of some contaminants and high concentrations of certain elements. The presence of these contaminants was linked to anthropogenic activities.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Gabor Tari, Gabor Bada, David R. D. Boote, Csaba Krezsek, Balazs Koroknai, Gabor Kovacs, Viktor Lemberkovics, Reinhard F. Sachsenhofer, Tamas Toth
Summary: The Pannonian Basin complex has a cumulative production of approximately 13 billion BOE. Estimates suggest that there are over 5 billion BOE of combined conventional and unconventional hydrocarbon potential remaining in this mature basin. The presence of multiple source rocks, stacked reservoirs, thick basin fill, established infrastructure, subsurface data, and access to markets make the Pannonian Basin similar to other super basins.
Article
Green & Sustainable Science & Technology
Alessandro Suriano, Costanzo Peter, Christoforos Benetatos, Francesca Verga
Summary: This study investigates the impact of model grid discretization on CO2 injection and trapping in underground storage. The results highlight that grid refinement is crucial for accurately simulating pressure evolution and the amount of CO2 trapped in geological formations.
Article
Geochemistry & Geophysics
Shiping Xing, Huaming Guo, Xinmiao Sun, Lingzhi Zhang, Aina Su
Summary: This study investigated the geochemical and isotopic characteristics of groundwater from different aquifers to understand the mechanisms of arsenic enrichment in geothermal groundwater. The results showed that arsenic concentrations were higher in the middle-Pliocene aquifer compared to the Quaternary aquifer. 57Li values varied more in the Quaternary aquifer and 511B values were generally lower in the Pliocene aquifer. The study also found that prolonged residence time and geothermal conduction played important roles in the enrichment of arsenic in the groundwater through processes such as B desorption and silicate weathering.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Engineering, Civil
Blaz Kogovsek, Igor Jemcov, Metka Petric
Summary: This paper presents an advanced application of time series analysis in a binary karst aquifer known for its complex hydrodynamics and mixing of water from various sources of recharge. The results show differences in water transfer, storage capacity, and recharge characteristics, but also highlight the limitations of using cross-correlation functions to distinguish the influence of autogenic and allogenic recharge. A method of partial cross-correlation analysis was used to investigate the mutual influences of allogenic and autogenic recharge for the first time. This approach provides additional insight into the functioning of binary karst aquifers.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Hanen Jarray, Fadoua Hamzaoui-Azaza, Mounira Zammouri, Mohamed Ouessar, Manuela Barbieri, Raul Carrey, Albert Soler, Enrico Guastaldi, Samir Sahal
Summary: Water scarcity is a significant issue in southeastern Tunisia, where the only water source is from overexploited, salinized, and contaminated aquifers. This study investigates the hydrochemistry of the groundwater in the Jeffara plain and finds that the water quality is poor and unsuitable for drinking and irrigation purposes. Strategies for treatment and preservation of these valuable resources are needed.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
Article
Water Resources
Hamidreza Erfani, Masoud Babaei, Carl Fredrik Berg, Vahid Niasar
Summary: Solubility trapping of carbon dioxide (CO2) in deep saline aquifers is an effective mechanism for carbon storage. This study investigates the scaling relations of convective mixing in the dissolution of CO2 in aquifer brine. The results provide new insights into the factors affecting the dissolution flux and onset time of convection, which are important for the prioritization and selection of appropriate aquifers for geological CO2 storage.
ADVANCES IN WATER RESOURCES
(2022)
Article
Geosciences, Multidisciplinary
Leonardo Piccini, Alessia Nannoni, Emilio Poggetti
Summary: This study investigates the functioning of marble karst aquifers by analyzing the hydrological behavior of Renara and Equi springs in Italy. The results show that the Apuan metamorphic aquifers are primarily characterized by conduit porosity, with observed dilution effects and delayed infiltration water arrival.
HYDROGEOLOGY JOURNAL
(2023)
Article
Engineering, Civil
Eungyu Park, Jonghyun Lee
Summary: This study introduces a non-Bayesian nonparametric model for characterizing hydraulic properties of a basin-scale aquifer, using a geostatistical principal component adaptation evolution strategy. The model shows high computational efficiency and scalability.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Environmental
Nina Rman, Teodora Szocs, Laszlo Palcsu, Andrej Lapanje
Summary: The study analyzed bottled natural mineral waters from an andesitic aquifer in Slovenia and found that the waters are enriched in magnesium, sulphate, and dissolved inorganic carbon, with a clear meteoric origin. Some wells exhibited CO2 degassing, while tritium activity was only detectable in the shallowest well. The δC-13 values of DIC indicated carbonate dissolution, and radiocarbon levels were relatively low.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2022)
Article
Geochemistry & Geophysics
Yuri Taran, Gennady Ryabinin, Boris Pokrovsky, Natalia Malik, Edith Cienfuegos
Summary: Wells up to 3000 m deep at the foot of the active volcanoes Koryaksky and Avachinsky within the Avachinsky Depression revealed a basin of saline waters with methane-rich gas and varying temperatures. The waters in the basin have a unique chemical composition, with high concentrations of sodium chloride, calcium, and strontium. Despite similar compositions of waters and gases, there are significant differences in the thermal fluids compared to colder fluids in other parts of the basin.
APPLIED GEOCHEMISTRY
(2022)