Article
Engineering, Chemical
Ayomikun Bello, Desmond Batsa Dorhjie, Anastasia Ivanova, Alexey Cheremisin
Summary: This study investigates the mineralization trapping mechanisms of CO2 in deep saline aquifers through simulation, examining the effects of injection period, pressure, temperature, and salinity. The research reveals that longer injection periods enhance the efficiency of CO2 mineralization trapping, while different minerals have specific temperature preferences for mineralization. The study contributes to the understanding of CO2 storage in deep saline aquifers and provides insights for optimizing CO2 mineralization processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Green & Sustainable Science & Technology
Xiaocong Lyu, Denis Voskov, William R. Rossen
Summary: This study utilizes a consistent thermodynamic model to describe the complex phase behavior of the CO2-brine system, incorporating an IT model for foam to accurately capture the dynamics of CO2 foam in the sequestration process. Simulation results validate the effectiveness of enhanced CO2 dissolution and foam in CO2 storage.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
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
Engineering, Civil
Ying Yu, Guodong Yang, Fei Cheng, Sen Yang
Summary: The study evaluated the effects of impurities N-2 and O-2 on the CO2 storage efficiency and costs in deep saline aquifers, finding that higher pressure and temperature can alleviate the reduction in CO2 storage efficiency while maintaining the benefits of impurities on CO2 dissolution efficiency. Despite a decrease of at least 32% in CO2 storage efficiency with 10% N-2, the increase in CO2 storage costs in saline aquifers was less than 0.01 US $/t CO2.
JOURNAL OF HYDROLOGY
(2021)
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
Green & Sustainable Science & Technology
Takashi Akai, Takashi Kuriyama, Shigeru Kato, Hiroshi Okabe
Summary: The study utilized field data for numerical modeling of long-term CO2 storage and revealed that the dominant storage mechanism during CO2 injection was structural trapping, while residual gas trapping occurred after injection cessation. Significant changes in storage mechanisms occurred within 20 years post-injection, transitioning to solubility trapping after 100 years with decreased residual CO2 trapping. Mass diffusion of CO2 controlled CO2 invasion into the cap rock over a simulation period of 1000 years.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Engineering, Multidisciplinary
Yan Shi, Yadong Lu, Yushi Rong, Ze Bai, Hao Bai, Mingqi Li, Qingchen Zhang
Summary: This paper numerically studied the geochemical reaction mechanism of CO2 storage in saline aquifers and its effects on the reservoir rocks and CO2 consumption. The results showed that the long-term geochemical reactions did not affect the porosity and permeability of the rocks and had no adverse consequences for extraction. The captured CO2 was distributed in gas, aqueous phase, and minerals, accounting for 27%, 65%, and 8% respectively. The study provides a theoretical reference for underground energy storage projects involving fluid-rock interactions.
ALEXANDRIA ENGINEERING JOURNAL
(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)
Article
Chemistry, Physical
Sina Omrani, Mehdi Ghasemi, Saeed Mahmoodpour, Ali Shafiei, Behzad Rostami
Summary: This research utilized Molecular Dynamics simulation to calculate the CO2 diffusion coefficient under various NaCl saline water concentrations, temperatures, and pressures. Higher NaCl concentrations were found to lead to a decrease in CO2 diffusion coefficient, and a new precise correlation was proposed for estimation. The presence of other salts such as CaCl2 and KCl had varying effects on the CO2 diffusion coefficient, with CaCl2 having the highest impact and KCl having the lowest.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Geosciences, Multidisciplinary
Songyan Li, Peng Wang, Zhoujie Wang, Hao Cheng, Kaiqiang Zhang
Summary: Geological CO2 storage is a promising approach to mitigate global carbon emissions, and saline aquifers and oil/gas reservoirs have been proven to be the most suitable storage sites. This paper proposes a novel strategy of enhancing CO2 storage capacity by synthesizing and utilizing high-dryness CO2 foam. Through experiments, it is confirmed that the new foam can effectively increase storage capacity and reduce water consumption.
GEOPHYSICAL RESEARCH LETTERS
(2023)
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
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
Green & Sustainable Science & Technology
Yosuke Sawano, Takuya Wako, Toru Sato, Kazuhiro Tada
Summary: CO2 capture and storage is a promising strategy to combat global warming. CO2 hydrate formation can help suppress CO2 leakage, with the sealing effect depending on the absolute permeability of the storage site.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Environmental Sciences
Avihai Tsinober, Ravid Rosenzweig, Holger Class, Rainer Helmig, Uri Shavit
Summary: Dissolution trapping is important in CO2 geological storage, and background flow can suppress the development of convective fingers in CO2 dissolution. The dissolution process can be categorized into three regimes based on the Pe/Ra ratio: natural convection dominant, pure forced convection dominant, and both natural and forced convection important.
WATER RESOURCES RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Yuhang Wang, Cornelis Vuik, Hadi Hajibeygi
Summary: The study investigates the impact of fractures on the carbon dioxide storage process and develops a numerical model for analysis. Results show that fractures have different effects on trapping mechanisms, with highly-conductive fractures facilitating dissolution trapping while weakening residual trapping.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Computer Science, Software Engineering
Karsten Rink, Ozgur Ozan Sen, Marco Hannemann, Uta Koedel, Erik Nixdorf, Ute Weber, Ulrike Werban, Martin Schroen, Thomas Kalbacher, Olaf Kolditz
Summary: This study proposes a framework for the 3D exploration of heterogeneous environmental data using Unity. It allows exploration of delayed consequences of transient phenomena and interrelations between processes within a geographical region. The framework integrates observation data and numerical simulations for specific hydrological events.
COMPUTERS & GRAPHICS-UK
(2022)
Article
Energy & Fuels
G. Ziefle, T. Cajuhi, N. Graebling, D. Jaeggi, O. Kolditz, H. Kunz, J. Massmann, K. Rink
Summary: To enable safe geological storage of high-level radioactive waste, it is important to have a comprehensive understanding of the physical processes, geological conditions, and geotechnical factors involved. The CD-A experiment conducted in the Mont Terri Rock Laboratory in Switzerland, along with extensive investigations, provides a multidisciplinary interpretation and numerical modeling of the hydraulic and mechanical processes in claystone under different climatic conditions.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2022)
Article
Energy & Fuels
Jakob Randow, Shuang Chen, Katrin Lubashevsky, Steve Thiel, Tom Reinhardt, Karsten Rink, Rudiger Grimm, Anke Bucher, Olaf Kolditz, Haibing Shao
Summary: Nowadays, there is an increasing interest in using shallow geothermal energy to heat and cool buildings in the building sector. Large borehole heat exchanger arrays are widely used to provide heat to different types of buildings. A case study in Berlin showed that the open-source code OpenGeoSys is a valid alternative to the widely used commercial software FEFLOW for modeling ground source heat pump systems.
Article
Thermodynamics
Wanlong Cai, Fenghao Wang, Shuang Chen, Chaofan Chen, Yuping Zhang, Olaf Kolditz, Haibing Shao
Summary: This article examines the design optimization of a ground source heat pump system using the COPall index and compares the effects of different borehole spacing. The results indicate that larger spacing provides better performance over the long term.
APPLIED THERMAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Renchao Lu, Thomas Nagel, Jenna Poonoosamy, Dmitri Naumov, Thomas Fischer, Vanessa Montoya, Olaf Kolditz, Haibing Shao
Summary: The IP-OS finite element scheme, compared to the traditional Nodal-OS, is more accurate and numerically stable, especially suitable for multi-layer heterogeneous systems. However, it is also more costly to implement.
COMPUTERS & GEOSCIENCES
(2022)
Article
Energy & Fuels
Karsten Rink, Oezguer Ozan Sen, Malte Schwanebeck, Tim Hartmann, Firdovsi Gasanzade, Johannes Nordbeck, Sebastian Bauer, Olaf Kolditz
Summary: The transition to renewable energy sources requires extensive changes to the energy system infrastructure. We propose an environmental information system for visualizing and exploring large collections of heterogeneous data in the scope of energy system infrastructure and subsurface geological energy storage technologies. The system can aid stakeholders in making informed decisions, researchers in investigating possible options, and the public in being informed about developments and options for future infrastructure.
Article
Archaeology
R. Pasteka, P. Zahorec, J. Papc, J. Mrlina, H. -j. Gotze, S. Schmidt
Summary: This study investigates the use of highly accurate microgravimetric measurements to map the recently discovered muon chamber in the Great Pyramid of Giza. By using modern gravimeters and realistic model calculations, researchers aim to understand the composition and structure of the pyramid chamber.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2022)
Article
Engineering, Geological
Eike Radeisen, Hua Shao, Juergen Hesser, Olaf Kolditz, Wenjie Xu, Wenqing Wang
Summary: This study introduces a new approach to simulate gas flow in preferential pathways in radioactive waste repositories using continuous modelling methods and spatial material properties derived from material heterogeneities and experimental observations. The proposed model incorporates hydro-mechanical spatial distributions, such as Young's modulus and gas entry pressure, and employs elastoplasticity combined with a linear swelling model. A gas injection test in a compacted, saturated bentonite sample was simulated using the OpenGeoSys 5.8 opensource code and compared with experimental observations to validate the effectiveness of the presented approach. The results show that the methodology is capable of simulating localized gas flow in preferential pathways.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Ajay Kumar, Mauro Cacace, Magdalena Scheck-Wenderoth, Hans-Juergen Goetze, Boris J. P. Kaus
Summary: The dynamics of the Alps and surrounding regions remain not fully understood due to the non-unique interpretation of its upper-mantle architecture. By clustering available shear-wave tomography models, three end-member scenarios of lithospheric thickness and slab geometries were derived and used as input for geodynamic simulations, revealing a potential explanation for observed seismicity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Editorial Material
Environmental Sciences
Olaf Kolditz, Diederik Jacques, Francis Claret, Johan Bertrand, Sergey V. Churakov, Christophe Debayle, Daniela Diaconu, Kateryna Fuzik, David Garcia, Nico Graebling, Bernd Grambow, Erika Holt, Andres Idiart, Petter Leira, Vanessa Montoya, Ernst Niederleithinger, Markus Olin, Wilfried Pfingsten, Nikolaos I. Prasianakis, Karsten Rink, Javier Samper, Istvan Szoeke, Reka Szoeke, Louise Theodon, Jacques Wendling
Summary: Data science has become an important tool in various scientific and industrial fields, disrupting research methods. Machine learning methods have been developed to accelerate numerical simulations and applied to nuclear waste management. The challenge now is integrating multi-chemical-physical, coupled processes, multi-scale and probabilistic simulations in Digital Twins (DTw) to predict the performance of physical systems. The development of DTw concepts for geological systems in radioactive waste management is particularly challenging due to complexities and uncertainties at varying time and spatial scales.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Vahid Ziaei-Rad, Mostafa Mollaali, Thomas Nagel, Olaf Kolditz, Keita Yoshioka
Summary: We propose a decomposition method for constitutive relations in the phase field approach to fracture, specifically designed for anisotropic/orthotropic materials to account for tension-compression asymmetry. This method retains the anisotropic behavior and tension-compression asymmetry in the crack response. In addition, we modify the energy release computation to accurately predict fracture propagation direction.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Geosciences, Multidisciplinary
Min Chen, Christophe Claramunt, Arzu coltekin, Xintao Liu, Peng Peng, Anthony C. Robinson, Dajiang Wang, Josef Strobl, John P. Wilson, Michael Batty, Mei-Po Kwan, Maryam Lotfian, Francois Golay, Stephane Joost, Jens Ingensand, Ahmad M. Senousi, Tao Cheng, Temenoujka Bandrova, Milan Konecny, Paul M. Torrens, Alexander Klippel, Songnian Li, Fengyuan Zhang, Li He, Jinfeng Wang, Carlo Ratti, Olaf Kolditz, Hui Lin, Guonian Lue
Summary: In recent decades, advances in the Internet of Things, mobile devices, sensor-based systems, and big data infrastructures have significantly influenced human interaction in both the digital and physical world. This has led to a paradigm shift in GIScience, as cyberspace offers new perspectives on the role of spatial and temporal dimensions. This paper highlights the challenges and opportunities of geographical space in relation to cyberspace, specifically focusing on data analytics and visualization, including extended AI capabilities and virtual reality representations. It emphasizes the importance of synergy between geographic and cyber data processing and analysis to enhance sustainability and address complex problems in urban and environmental sciences.
EARTH-SCIENCE REVIEWS
(2023)
Article
Engineering, Civil
Linwei Hu, Maike Schnackenberg, Goetz Hornbruch, Klas Lueders, Wolf Tilmann Pfeiffer, Ulrike Werban, Sebastian Bauer
Summary: Gas leakage can impact groundwater flow and media compressibility in subsurface environments. This study demonstrates that changes in hydraulic conductivity and specific storage, determined through pumping tests, can be used to detect the presence of a new gas phase. The experiments conducted at a field site in Germany showed significant changes in these parameters after injection of methane and hydrogen gas phases.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Geological
Michael Pitz, Sonja Kaiser, Norbert Grunwald, Vinay Kumar, Joerg Buchwald, Wenqing Wang, Dmitri Naumov, Aqeel Afzal Chaudhry, Jobst Massmann, Jan Thiedau, Olaf Kolditz, Thomas Nagel
Summary: This paper presents the governing equations of non-isothermal two-phase flow in unsaturated, deformable porous media based on different representations of the gaseous phase. Two implementations, using the Richards equation and a two-component two-phase flow formulation, are illustrated through a series of tests to examine the impact of a free gaseous phase on model predictions. The examples considered thermal consolidation and pore fluid pressurisation effects, providing insights into conceptual model uncertainty.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)