Article
Environmental Sciences
Ahmad H. Askar, Tissa H. Illangasekare, Andrew Trautz, Jakub Solovsky, Ye Zhang, Radek Fucik
Summary: Natural fissures/faults or pressure-induced fractures in the caprock can potentially leak far-field native brine contaminating underground drinking water sources. Developing accurate models to simulate brine propagation through various formations and aquifers is crucial for site selection and risk assessment. Uncertainties in source conditions, such as hydro-structural properties of caprock fracture/fault zone and permeability field of storage formation, can impact the accuracy of brine plume predictions.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Ting Xiao, Bonan Wang, Lei Xu, Richard Esser, Zhenxue Dai, Martha Cather, Brian McPherson
Summary: This study quantified the impact of potential CO2 leakage from geologic CO2 sequestration reservoirs on underground sources of drinking water quality. Key mechanisms identified were carbonate mineral impurity and cation exchange, requiring effective leakage detection tools for long-term safety of GCS projects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ahmad H. Askar, Tissa H. Illangasekare, Ana Maria Carmen Ilie
Summary: Monitoring brine leakage from CO2 geological storages is crucial for protecting shallow aquifers. An innovative framework for designing CGS monitoring systems has been developed, which can effectively utilize both shallow and deep zone data to optimize leakage detection and safeguard groundwater quality.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
A. Cihan, C. M. Oldenburg, J. T. Birkholzer
Summary: This study presents a semi-analytical model for studying hydraulic head and brine leakage in multilayered aquifer-aquitard systems with geologic pressure forcing. The results show that even though suitable permeable aquitards can dissipate pressure rapidly, geologic forcing may cause sustained brine leakage into freshwater aquifers through leaky wells.
WATER RESOURCES RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Mingjie Chen, Ali Al-Maktoumi, Azizallah Izady
Summary: CO2 plume geothermal production combined with Carbon Dioxide geological storage offers a new technique to utilize non-carbon renewable energy and offset storage costs. This study addresses the lack of research on fault-compartmentalized, inclined reservoirs, providing guidance for optimal well placement and operation in geothermal fields.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Environmental Sciences
Ting Xiao, Jiawei Tu, Bonan Wang, Richard Esser, Tessa Bailey, Martha Cather, Hailong Tian, Brian McPherson
Summary: The study aims to evaluate the potential impacts of CO2 leakage into a fresh-water aquifer and the interactions between CO2, water, and sediment at a GCS site in Texas, USA. The results suggest that trace metals are released from sediment due to the dissolution of impure carbonate minerals and cation exchange with CO2. While most cation concentrations quickly decrease after CO2 leakage ceases, the co-leakage of saline water may increase the salinity of the aquifer and induce more trace metal release from the sediment. Overall, pH appears to be a sensitive parameter for detecting CO2 leakage.
Article
Geosciences, Multidisciplinary
Bailian Chen, Dylan R. Harp, Yingqi Zhang, Curtis M. Oldenburg, Rajesh J. Pawar
Summary: Geologic uncertainty in CO2 sequestration sites can lead to large uncertainty in risk-related system properties and metrics. This study develops a dynamic risk assessment approach to reduce uncertainty and demonstrates its effectiveness through case studies.
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)
Review
Energy & Fuels
Cheng Zhang, Milei Wang
Summary: The translation paragraph introduces the importance of interfacial tension (IFT) between CO2 and brine in geological CO2 storage (GCS), and provides a systematic review of the current research on the IFT of CO2/brine system, including experimental methods, data, and influencing factors.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Timothy Bartholomew, Meagan S. Mauter
Summary: Safe and cost-effective geologic carbon storage necessitates active reservoir management, including brine extraction to minimize subsurface pressure accumulation. Estimating energy and CO2 emission penalties of extracted brine management is crucial for evaluating the cost of CO2 storage and optimizing national CO2 transport and storage infrastructure.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
M. Fahed Qureshi, Himanshu Khandelwal, Adam Usadi, Timothy A. Barckholtz, Ashish B. Mhadeshwar, Praveen Linga
Summary: This research evaluates the stability of CO2 hydrates in deep-sea saline sediments and finds that they are stable when immersed in a saline solution.
Article
Energy & Fuels
Ahmad H. Askar, Tissa H. Illangasekare
Summary: This paper investigates the use of brine extraction to control far-field brine leakage in CO2 storage. The proposed method involves placing extraction wells in the storage zone to reduce leakage flow and diluting the escaped brine using the overlying formations. The approach is optimized using a Genetic Algorithm and transport model simulations and validated through experimental and numerical evaluations. The study provides insights into optimizing well placements and extraction rates for controlling brine leakage in carbon storage operations.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Alexander P. Bump, Sahar Bakhshian, Hailun Ni, Susan D. Hovorka, Marianna I. Olariu, Dallas Dunlap, Seyyed A. Hosseini, Timothy A. Meckel
Summary: Permanent containment is crucial for geologic carbon sequestration. The concept of composite confining systems, consisting of multiple layers of discontinuous barriers, offers an alternative to traditional petroleum seals for CO2 storage. Physical modeling, geologic characterization, and numerical modeling demonstrate that these systems can effectively prevent vertical migration of CO2. However, risks such as shortcut paths through stratigraphic barriers need to be addressed.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Article
Green & Sustainable Science & Technology
Nafis Mahmud, Mohamed H. Ibrahim, Daniela V. Fraga Alvarez, Daniel V. Esposito, Muftah H. El-Naas
Summary: A multistage process scheme for extracting valuable minerals from desalination reject brine while simultaneously sequestering CO2 has been proposed. The study showed that efficient removal of calcium ions and CO2 uptake can be achieved, resulting in the formation of high purity calcium carbonates under optimized conditions.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Multidisciplinary Sciences
Jeffrey M. Bielicki, Martina Leveni, Jeremiah X. Johnson, Brian R. Ellis
Summary: Achieving ambitious greenhouse gas mitigation targets will require advances in carbon-free power generation and the use of geologic carbon dioxide (CO2) storage. Utilizing CO2 as a working fluid for geothermal energy production and energy storage can help isolate CO2 from the atmosphere and enable high levels of carbon-free electricity production. This article summarizes the state of knowledge for sedimentary basin CO2-geothermal and explores its potential role in decarbonizing the energy sector. It also discusses the promise and challenges of using geologically stored CO2 for bulk energy storage.
Article
Geosciences, Multidisciplinary
Chuanjun Zhan, Zhenxue Dai, Mohamad Reza Soltanian, Xiaoying Zhang
Summary: This study develops an inversion framework that combines stochastic and deep-learning models to overcome limitations in identifying subsurface sedimentary structures. The framework generates structure samples required by deep-learning models through stochastic models and reduces uncertainty using the trained deep-learning model. It successfully estimates subsurface sedimentary structures using available observations.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Wen Zhang, Jia Wang, Jianping Chen, Mohamad Reza Soltanian, Zhenxue Dai, Giday WoldeGabriel
Summary: This article discusses the impact of the Indian summer monsoon on precipitation in the Indian subcontinent and the world's population, and proposes a proxy based on mass-wasting for studying the paleo-hydrogeology of the Southeast Tibetan Plateau and reconstructing the variability of ISM intensity in the past 130,000 years. The research suggests that mass-wasting events provide sufficient samples for paleoclimate research and are prone to dramatic climate changes.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Nathan Moodie, Wei Jia, Richard Middleton, Sean Yaw, Si-Yong Lee, Ting Xiao, David Wheatley, Peter Steele, Rich Esser, Brian McPherson
Summary: Geologic Carbon Storage (GCS) is a promising technology for effectively and permanently storing large volumes of anthropogenic CO2. A regional GCS analysis was conducted in central Utah to assess the efficacy of storing CO2 emissions from power generation and heavy industries. The results indicate that the area has the capacity to securely store a significant amount of CO2, making it suitable for commercial-scale GCS.
Article
Green & Sustainable Science & Technology
Hailong Tian, Zimeng Yu, Tianfu Xu, Ting Xiao, Songhua Shang
Summary: This study developed a simulator to evaluate the potential of CH4 recovery by injecting CO2 mixture into a hydrate-bearing reservoir. The results suggest that by performing similar operational procedures, high recovery efficiency of CH4 and storage ratio of CO2 can be achieved. Sensitivity analysis also showed that decreasing the concentration of CO2 in the mixtures can improve the recovery efficiency of CH4, but simultaneously reduce the storage ratio of CO2.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Reza Ershadnia, Mrityunjay Singh, Saeed Mahmoodpour, Alireza Meyal, Farzad Moeini, Seyyed Abolfazl Hosseini, Daniel Murray Sturmer, Mojdeh Rasoulzadeh, Zhenxue Dai, Mohamad Reza Soltanian
Summary: Transitioning to renewable energies is crucial for addressing climate change and establishing a sustainable energy system. However, the fluctuation in availability of renewable energy sources poses a challenge of demand and supply imbalance. In this study, we investigate the injection, storage, and production of green hydrogen (H2) in a three-dimensional heterogeneous aquifer system, considering factors such as anisotropy ratio, temperature, relative permeability hysteresis, well perforation placement, and cushion gas type. Our findings suggest that successful H2 recovery depends on the aquifer's anisotropy, temperature, injection and production strategies, as well as the use of low-density and low-viscosity cushion gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Xiaoying Zhang, Zheng Wang, Paul Reimus, Funing Ma, Mohamad Reza Soltanian, Baoshan Xing, Jianzheng Zang, Yu Wang, Zhenxue Dai
Summary: This study investigates the concurrent transport of plutonium (Pu) species in the subsurface environment and reveals the sorption behavior of each species. The experimental results show that the transport behavior of Pu is affected by its oxidation states and species. The model developed in this study can describe the sorption of Pu species occurring either on fracture surfaces or in the rock matrix. Moreover, the study finds that the sorption rate of all Pu species tends to decrease with increasing time scales.
Article
Environmental Sciences
Wanli Ren, Reza Ershadnia, Corey D. Wallace, Eric M. LaBolle, Zhenxue Dai, Felipe P. J. de Barros, Mohamad R. Soltanian
Summary: This study investigates the dispersion and mixing behavior of solute in a heterogeneous aquifer using high-resolution and three-dimensional numerical simulations. The results show that meter-scale heterogeneity plays a significant role in solute transport processes, and effective dispersion is more sensitive to the spatial organization of sedimentary facies types.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Chuanjun Zhan, Zhenxue Dai, Mohamad Reza Soltanian, Felipe P. J. de Barros
Summary: Reliable characterization of subsurface structures is crucial for earth sciences and related applications. Data assimilation-based identification frameworks, coupled with non-isothermal flow and transport simulations, can accurately estimate subsurface structures using available observations. Results show that including dynamic observations improves structure identification and reduces uncertainty. Furthermore, the deep learning-based framework outperforms stochastic methods in accurately identifying subsurface structures.
WATER RESOURCES RESEARCH
(2022)
Article
Energy & Fuels
Yanwei Wang, Zhenxue Dai, Li Chen, Xudong Shen, Fangxuan Chen, Mohamad Reza Soltanian
Summary: A multi-scale model is developed to describe CO2 transport and storage in shale reservoirs with a multi-stage fractured horizontal well. The study proposes a workflow for evaluating CO2 storage capacity, based on the established model. The findings suggest that CO2 storage capacity is influenced by various factors, and the storage capacity can increase significantly at high injection pressures.
Article
Environmental Sciences
Ting Xiao, Jiawei Tu, Bonan Wang, Richard Esser, Tessa Bailey, Martha Cather, Hailong Tian, Brian McPherson
Summary: The study aims to evaluate the potential impacts of CO2 leakage into a fresh-water aquifer and the interactions between CO2, water, and sediment at a GCS site in Texas, USA. The results suggest that trace metals are released from sediment due to the dissolution of impure carbonate minerals and cation exchange with CO2. While most cation concentrations quickly decrease after CO2 leakage ceases, the co-leakage of saline water may increase the salinity of the aquifer and induce more trace metal release from the sediment. Overall, pH appears to be a sensitive parameter for detecting CO2 leakage.
Article
Engineering, Civil
Wanli Ren, Heng Dai, Songhu Yuan, Zhenxue Dai, Ming Ye, Mohamad Reza Soltanian
Summary: Lagrangian-based transport models can effectively study mass transport processes in aquifer systems. This study identifies the key uncertain inputs for non-reactive and sorptive solute dispersivity through a global sensitivity analysis. The results show that sorptive solute dispersivity is most sensitive to in-facies mean Kd, while non-reactive plume dispersivity is most sensitive to in-facies mean K and other facies properties.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Environmental
Sida Jia, Zhenxue Dai, Zhichao Zhou, Hui Ling, Zhijie Yang, Linlin Qi, Zihao Wang, Xiaoying Zhang, Hung Vo Thanh, Mohamad Reza Soltanian
Summary: Physical heterogeneities are prevalent in fracture systems and have a significant impact on transport processes in aquifers. Upscaling solute transport parameters is an effective method for studying variability in heterogeneous aquifers. This paper develops conceptual models for upscaling conservative transport parameters, focusing on dispersivity. The proposed Lagrangian-based transport model is validated and compared against experimental results, showing good agreement.
Article
Computer Science, Artificial Intelligence
Shadfar Davoodi, Hung Vo Thanh, David A. Wood, Mohammad Mehrad, Valeriy S. Rukavishnikov, Zhenxue Dai
Summary: Ongoing anthropogenic carbon dioxide emissions cause severe air pollution and complex changes in the climate. Geological CO2 storage offers a promising solution by removing some of the CO2 emissions. This study models the solubility and trapping efficiency of CO2 in saline aquifers using machine learning and deep learning algorithms, and finds that the LSSVM model delivers the most accurate predictions.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Geochemistry & Geophysics
Huichao Yin, Gaizhuo Zhang, Qiang Wu, Shangxian Yin, Mohamad Reza Soltanian, Hung Vo Thanh, Zhenxue Dai
Summary: This study proposes an innovative data-driven approach for predicting mining water inrush using field 3-D microseismic monitoring data. The approach couples machine learning and deep learning models to analyze microseismic events, preprocesses the data using DBSCAN and RANSAC algorithms, and detects anomalies using LSTM, AE, iForest, and LSTM+iForest models. The study accurately predicts a major water inrush incident hours prior to its occurrence and suggests future studies to evaluate and calibrate the deep learning models using microseismic datasets from different mining operations.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Engineering, Environmental
Xiaoying Zhang, Fangfei Cai, Funing Ma, Paul Reimus, Linlin Qi, Di Lu, Mohamad Reza Soltanian, Zhenxue Dai
Summary: This study investigated the co-transport behavior of radionuclides and colloids in different types of granite minerals. It found that the presence of colloids enhanced the transport of strontium and different minerals showed different retardation levels. Potassium feldspar was less affected by colloids due to its strong cation exchange capacity.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
