Article
Chemistry, Physical
Samantha L. Flores-Lopez, Luis A. Ramirez-Montoya, M. Dolores Casal, Miguel A. Montes-Moran, J. Angel Menendez, Ana Arenillas
Summary: Extensive studies have been conducted on the correlation between synthesis variables and the final properties of resorcinol-formaldehyde carbon gels. Different combinations of synthesis variables can lead to carbon gels with similar pore sizes and porosity, but their behaviors in applications may vary. The distribution and connectivity of polymeric clusters are strongly influenced by factors such as water and methanol content in the precursor solution, affecting pore tortuosity and material permeability. Increasing water content or using a suitable combination of methanol content and precursor solution pH during the polymerization process can result in less tortuous pore structures in carbon gels with the same porosity.
Article
Geosciences, Multidisciplinary
Chenyang Feng, Scott Melnyk, Cole Ross, Keith Shanley, John-Paul Zonneveld, Murray K. Gingras
Summary: The reservoir quality of the Lower Triassic Montney Formation in the Puskwaskau Field was assessed based on four lithofacies, with L-3 having the best reservoir quality, L-1 and L-4 having poor reservoir quality, and L-2 considered fair. Analysis of properties such as porosity, permeability, pore throat radius, clay content, and cementation revealed the differences in reservoir quality among the lithofacies. The results highlight the importance of lithofacies classification in understanding reservoir characteristics in the producing field.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Environmental Sciences
Kai Xu, Wei Wei, Yin Chen, Haitao Tian, Sai Xu, Jianchao Cai
Summary: The study found that throat size has a significant impact on rock permeability, with permeability decreasing significantly when one of the nine throats reduces to half size. Compared to pore coordination number, small throat size has a more obvious influence on permeability.
Article
Environmental Sciences
Tolulope Q. Agbaje, Behzad Ghanbarian, Jeffrey D. Hyman
Summary: This study investigates the scale-dependent effective permeability in matrix-fracture systems using numerical simulations and theoretical modeling. The critical fracture density and scaling exponent are found to be linked to reservoir properties and size. The theoretical estimations of effective permeability agree well with numerical simulations in six unseen fractured reservoirs.
WATER RESOURCES RESEARCH
(2023)
Article
Thermodynamics
Min Yan, Ming Zhou, Shugang Li, Haifei Lin, Kunyin Zhang, Binbin Zhang, Chi-Min Shu
Summary: The micropore structure of coal was reconstructed and quantitatively analysed to study its impact on gas seepage in a coal reservoir. It was found that porosity and pore structure had significant effects on gas seepage velocity and apparent permeability. The study revealed that gas seepage velocity increased with porosity, with different pore structures exhibiting varied gas seepage characteristics.
Article
Engineering, Chemical
Fateme Shamsi, Saeid Norouzi-Apourvari, Saeed Jafari
Summary: Image-based simulations at the pore scale provide insight into the impact of microstructure on flow and transport processes in porous media. The study reveals a strong nonlinear relationship between morphological parameters like constrictivity and permeability/effective diffusivity in porous media. Increasing pore space connectivity by reducing Euler number leads to higher permeability and effective diffusivity in heterogeneous porous media.
TRANSPORT IN POROUS MEDIA
(2021)
Article
Geochemistry & Geophysics
Xinglin Wang, Philip M. Singer, Yunke Liu, Zeliang Chen, George J. Hirasaki, Harold J. Vinegar
Summary: A new method is developed in this study to estimate permeability using NMR restricted diffusion measurements to infer pore size, tortuosity, and porosity information. Applied to organic-rich chalk, this method shows advantages in complex pore structures and organic matter, providing potential for permeability estimation through well-logging and core-log integration.
Article
Energy & Fuels
Guangfeng Liu, Shuaiting Xie, Wei Tian, Juntao Wang, Siying Li, Yixuan Wang, Daoyong Yang
Summary: In this study, the effect of pore-throat structure on gas-water seepage behavior in a tight gas sandstone formation was experimentally examined. The study found that deteriorated pore-throat structure leads to weakened permeability of gas and water, along with more severe water locking. This research provides a better understanding of how pore-throat structure influences gas-water seepage behavior in tight gas reservoirs.
Article
Engineering, Environmental
Dongdong Xu, Jiahui Fan, Wenji Li, Wenda Chen, Chao Pan, Da Kang, Yiyu Li, Shengdao Shan, Ping Zheng
Summary: The study investigated the correlation between permeability and granule size of Anammox granules, finding a negative relationship between them. With the increase of granule size, the pore structure varied significantly, affecting the fluid collection efficiency.
Article
Energy & Fuels
Yilin Chang, Zhengming Yang, Yapu Zhang, Zhongkun Niu, Xinliang Chen, Meng Du
Summary: The microscopic pore-throat structures of tight sandstone and tight glutenite were characterized using high-pressure mercury injection, constant-rate mercury injection, and nano-CT. The fractal theory was applied to quantitatively analyze the heterogeneity and permeability of the rocks. The results showed that the pore-throat size distribution of sandstone was relatively concentrated and well-sorted, while glutenite exhibited a multipeak pattern with similar proportions of throat sizes. The key difference between the two rocks was the throat structure, which controlled the flow and resulted in poor correlation between porosity and permeability in glutenite.
Article
Geosciences, Multidisciplinary
Guangfeng Liu, Yifeng Wang, Hang Yin, Yaping Ding, Yifei Lan, Daoyong Yang
Summary: A pragmatic technique was developed to experimentally determine gas-water seepage characteristics, considering dynamic pore-throat structure. The impact of dynamic pore-throat structure on gas-water micro-distribution and percolation capacity is most significant at the initial stage.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Engineering, Chemical
Yang Zhang, Siru Zhou, Zhenglei Li, Haoquan Zhang, Meng Zhang, Jun Wang, Lingling Chen, Hongwei Zhang
Summary: This study explored the fate of Pluronic copolymers with different molecular architectures in membrane matrix during casting PSF UF membranes. The results showed that the increment of pore radius in passive solute sieving experiments was positively correlated with the degree of polymerization (DP) of EO segments within the corresponding additive.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Hongyang Ni, Jiangfeng Liu, Tao Chen, Shaojie Chen, Qingbin Meng
Summary: The study analyzed the pore-fracture structure and permeability of coal samples quantitatively using scanning electron microscopy (SEM) and found that both pores and fractures have their own distribution characteristics. It was also shown that by considering the effect of tortuosity, more accurate prediction results of permeability can be obtained.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Yunke Liu, Xinglin Wang, George J. Hirasaki, Eva G. Vinegar, Harold J. Vinegar, Philip M. Singer
Summary: This paper reports a novel method to interpret and distinguish liquid-like and solid-like signals in organic-rich chalks. The method shows potential for improved fluid typing and saturation, as well as insights into pore network blockage.
Article
Thermodynamics
Hyun Woong Jang, Daoyong Yang
Summary: In this study, the conventional pressure-decay technique was improved and extended to estimate the effective diffusivity of each component in a binary gas mixture in heavy oil. The experimental and theoretical methods were combined to determine the effective diffusivity of CO2 and C3H8 in heavy oil, and the results were compared with experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Water Resources
Barnabas Adeyemi, Behzad Ghanbarian, C. L. Winter, Peter R. King
Summary: The study aims to estimate the effective permeability of geological formations using critical path analysis (CPA) and compare its accuracy to numerical simulations and other models. The results show that CPA provides accurate estimations in various heterogeneity levels, similar to renormalization group theory (RGT).
ADVANCES IN WATER RESOURCES
(2022)
Article
Environmental Sciences
Behzad Ghanbarian
Summary: In porous media, understanding the scale dependence is crucial. This study proposes a finite-size scaling analysis from physics to investigate the scale dependence of tortuosity and diffusion coefficient, and demonstrates its effectiveness through simulation comparison.
JOURNAL OF CONTAMINANT HYDROLOGY
(2022)
Article
Soil Science
Behzad Ghanbarian, Todd H. Skaggs
Summary: This study proposes a method for quantifying soil structure and verifies its feasibility through theoretical models and experimental data. The study finds that there is a correlation between the pore-throat radius at the inflection point of the soil water retention curve and the saturated hydraulic conductivity. The experimental results are very close to the theoretical values, indicating that this method can be used to evaluate the saturated hydraulic conductivity of soils.
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Mohsen Faramarzi-Palangar, Abouzar Mirzaei-Paiaman, Seyyed Ali Ghoreishi, Behzad Ghanbarian
Summary: Various methods for evaluating reservoir rock wettability have been proposed. This study conducted experiments on a carbonate reservoir to evaluate and compare different quantitative and qualitative wettability indicators. The results showed consistency between relative permeability-based approaches and Amott-Harvey and USBM methods. The study also investigated the relationship between wettability indices and rock quality indicators.
APPLIED SCIENCES-BASEL
(2022)
Article
Water Resources
Behzad Ghanbarian
Summary: This paper investigates the effect of sample size on the hydraulic characteristics of porous media and proposes a theoretical model to estimate their scale dependent properties. By incorporating porosity and finite size effects, accurate estimates of permeability's scale dependence can be achieved.
ADVANCES IN WATER RESOURCES
(2022)
Article
Environmental Sciences
Behzad Ghanbarian, Yashar Mehmani, Brian Berkowitz
Summary: This study investigates the influence of pore-wall roughness on contaminant migration through particle tracking simulations and analyzes the resulting arrival time distributions using the CTRW approach. The results show that pore-wall roughness has a significant impact on the parameters t(1) and D, while the Peclet number has a greater impact on v and D.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Allen G. Hunt, Muhammad Sahimi, Boris A. Faybishenko, Markus Egli, Behzad Ghanbarian, Fang Yu
Summary: Understanding the relationship between carbon cycle and water demand is crucial for global climate change and predicting water resources. Our theoretical description based on percolation theory proposes that the fractal dimensionality of root systems affects evapotranspiration and carbon drawdown. We test our predictions using data from sclerophyll forests and find good agreement, with local PET variability playing a role in reducing data scatter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Misagh Esmaeilpour, Behzad Ghanbarian, Rita Sousa, Peter R. King
Summary: Investigating hydraulic and petrophysical properties of porous media has been an active area of research. In this study, we propose applying renormalization group theory (RGT) at the pore scale to determine the scale dependence of effective pore-throat radius and develop two theoretical models to estimate permeability in different pore networks. The results show that the RGT estimates the scale-dependent permeability reasonably well.
WATER RESOURCES RESEARCH
(2023)
Article
Soil Science
Yongwei Fu, Behzad Ghanbarian, Robert Horton, Joshua Heitman
Summary: In this study, the performance of the G&D model and two empirical λ(θ) models were evaluated using calibration and validation datasets. The calibration improved the performance of the G&D model, resulting in a similar accuracy to the empirical models.
Article
Soil Science
S. Jace Kaminski, Behzad Ghanbarian, Stacey Kulesza, Bo V. Iversen, Andres Patrignani
Summary: Understanding the effect of sample volume on soil properties is important for hydrogeology, soil physics, and environmental engineering. This study uses percolation theory to estimate the scale dependency of hydraulic conductivity in soils. The researchers applied classification methods and conducted experiments on soil samples from four Danish sites to determine the relationship between pore size distribution and hydraulic conductivity. The theoretical estimates aligned well with experimental measurements, showing that the theory provides accurate estimations in certain soil textures and classes.
Article
Soil Science
Behzad Ghanbarian, Qingyang Lin, Luiz F. Pires
Summary: This study investigates the scale dependence of tortuosity in soils, finding that tortuosity is related to porosity, critical porosity, a fundamental length scale, and optimal path fractal dimension. The proposed model accurately estimates the scale dependence of tortuosity in soils, with better accuracy for conventional tillage samples. The percolation-based theoretical model provides more precise estimations compared to another model assuming two-dimensional square solid particles as the porous medium. The effect of scale on tortuosity is more pronounced for no tillage samples.
SOIL & TILLAGE RESEARCH
(2023)
Article
Soil Science
Andres Patrignani, Behzad Ghanbarian, Gerard J. Kluitenberg, Nathaniel Parker
Summary: This study applied the percolation-based effective-medium approximation (P-EMA) model to estimate the saturation dependence of soil thermal conductivity. The results showed that the P-EMA model had comparable accuracy to the widely used Johansen model and required fewer input parameters. Future research should focus on better understanding the physical meaning of the model parameters to improve the ability to model soil thermal conductivity.
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Allen G. Hunt, Muhammad Sahimi, Behzad Ghanbarian
Summary: The utilization of precipitation and the amount of runoff are key issues in hydrologic science, ecology, climate change, and geopolitics. We propose a theory for water balance that predicts changes in streamflow due to changes in temperature and precipitation. The theory incorporates a single parameter, derived under certain conditions, that is not adjustable. By comparing the theory with global data on precipitation elasticity, we find that it accurately captures the trends of median precipitation elasticity variations. Unlike the classical Budyko phenomenology, our theory yields a median precipitation elasticity value of 2 for all aridity indices greater than 1.
Article
Engineering, Civil
Tayeb Jamali, Behzad Ghanbarian, Juergen Kurths
Summary: This study applied complex network theory to analyze precipitation data in the contiguous United States and investigated synchronization patterns of extreme precipitation events across the nation. The results showed that the number of extreme precipitation events in the CONUS has been increasing over the past four decades, with similar slopes in the summer and winter seasons. The study also revealed both local and regional connections as well as teleconnections demonstrating synchronization of extreme precipitation events across scales.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Tolulope Q. Agbaje, Behzad Ghanbarian, Jeffrey D. Hyman
Summary: This study investigates the scale-dependent effective permeability in matrix-fracture systems using numerical simulations and theoretical modeling. The critical fracture density and scaling exponent are found to be linked to reservoir properties and size. The theoretical estimations of effective permeability agree well with numerical simulations in six unseen fractured reservoirs.
WATER RESOURCES RESEARCH
(2023)
