Article
Engineering, Geological
Julia T. Camargo, Joshua A. White, Nicola Castelletto, Ronaldo I. Borja
Summary: This paper aims to enhance the performance of Newton-Krylov solvers for coupled poromechanical problems with two-phase flow by investigating the impact of capillary pressure on preconditioning strategies. Preconditioning approaches that account for the behavior of the flow equations under different capillary pressure relations are proposed to achieve robust numerical performance within a broad range of regimes.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Sahil Wani, Rahul Samala, Ramesh Kannan Kandasami, Abhijit Chaudhuri
Summary: This study presents a custom-developed coupled THMC solver to realistically quantify the gas production and associated sediment deformation. The results indicate that the well-bore in the middle of the reservoir yields the highest cumulative gas production while differential settlement is minimum, thus making it a preferable location for placing the horizontal well-bores.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Mechanics
Kristin N. Travis, Sarah E. Smith, Laure Vignal, Henda Djeridi, Mickael Bourgoin, Raul Bayoan Cal, Martin Obligado
Summary: This study presents the findings of a wind tunnel experiment investigating the behavior and dynamics of inertial particles in the turbulent wake of a stationary porous disk. The study compares concentrations of poly-disperse water droplets and sub-inertial tracer particles, and analyzes the effects of particle wake interaction on turbulence and particle size distributions in the near and far wake regions.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Xiaoxi Zhao, Birendra Jha
Summary: This study presents a computational framework to understand the impact of plastic deformation on induced fault slip events. Results show that a poroplastic reservoir exhibits larger vertical deformation and delayed slip compared to a poroelastic reservoir, and a reservoir with a smaller modulus than the caprock displays a larger vertical displacement and an earlier onset of both plastic failure and fault slip.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Arjen Mascini, Marijn Boone, Stefanie Van Offenwert, Shan Wang, Veerle Cnudde, Tom Bultreys
Summary: The study investigated multiphase flow in heterogeneous rocks with different wetting properties, revealing significant variability in driving force balance between different pores and a key role of viscous forces in the dynamics. The complex interplay between mixed wettability and pore structure exacerbated these differences, emphasizing the need for further research on the fundamental controls on multiphase flow in geomaterials.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Mechanics
Cosan Daskiran, Fangda Cui, Michel C. Boufadel, Ruixue Liu, Lin Zhao, Tamay Ozgokmen, Scott Socolofsky, Kenneth Lee
Summary: Understanding the size of oil droplets released from a jet in crossflow is crucial for estimating the trajectory of hydrocarbons and the rates of oil biodegradation/dissolution in the water column. Experimental results and simulations show that the size of oil droplets increases with elevation across the plume, likely due to the individual rise velocity of droplets. The simulation effectively captures the top and bottom boundaries of the plume, with smaller droplets observed at the center axis compared to the side boundaries due to the formation of counter-rotating vortex pair.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Engineering, Marine
Alessandro Capone, Fabio Di Felice, Francisco Alves Pereira
Summary: This study investigates a turbulent channel flow laden with elongated, fiber-like particles using optical techniques. The flow-particle inter-coupling is analyzed, with a focus on particles with different aspect ratios and volume fractions. The research reports turbulence enhancement near the wall region, with a higher level of increase associated with higher aspect ratio particles, suggesting that turbulence modulation stems from particles' orientational behavior.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Mechanics
Davide Wuthrich, Rui Shi, Hubert Chanson
Summary: Highly turbulent free-surface flows exhibit complex and rapidly changing air-water surface features, impacting environmental flows. A deeper understanding requires multiple repetitions and statistical analysis, as well as the use of optical flow techniques to characterize surface velocity fields.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Computer Science, Software Engineering
Wei Li, Mathieu Desbrun
Summary: This paper presents an improved numerical simulation method that can accurately simulate complex fluid phenomena and effectively handle fluid-solid coupling. It introduces a series of numerical improvements in momentum exchange, interfacial forces, and two-way coupling to reduce simulation artifacts and expand the types of fluid-solid coupling that can be efficiently simulated. The benefits of the solver are demonstrated through challenging simulation results and comparisons to previous work and real footage.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Energy & Fuels
Qi Zhang, Zhen-Yu Yin, Xia Yan
Summary: This study investigates the theoretical and practical aspects of anisotropy in shale gas reservoirs. The authors propose a novel mixture theory approach to study the poromechanical constants of anisotropic poroelasticity. They also examine the impacts of anisotropy in a 3D shale gas reservoir, considering both elastic and permeability anisotropy. The findings suggest that isotropic models are unable to accurately predict stress changes and gas production in anisotropic shale gas reservoirs.
Article
Polymer Science
Sina Mobaraki, Hamid Tabatabaee, Reza Shiri Torkmani, Seyed Shahram Khalilinezhad, Saeed Ghorashi
Summary: This study investigates the mechanism of polymer nanohybrids in remobilizing oil droplets through porous media. The research reveals that the hybrid material exhibits high shear viscosity and the ability to alter surface wettability, thus significantly improving the capillary number at the oil-water interface.
Article
Energy & Fuels
Jiahui Chen, Ziming Xu, Juliana Y. Leung
Summary: A new discrete fracture model is implemented in the MATLAB Reservoir Simulation Toolbox to couple flow and geomechanical computations. Unstructured meshing is used for discretization, and the fluxes between different domains are computed explicitly. Flow calculations and geomechanical computations are solved sequentially, and several case studies demonstrate the utility of the coupling strategy. The model considers poroelasticity and stress/strain variation in fractured domains, and investigates factors influencing fracture interference behavior.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Geological
Sangcheol Yoon, Jihoon Kim, Evan Schankee Um
Summary: This study investigates the effects of coupled multiphase flow and geomechanics in hydraulically fractured reservoirs using numerical simulations. A new numerically stable sequential method for all-way coupled geomechanics and flow in discrete fractured systems is proposed. The study identifies vacuum areas and dry zones at the fracture tip, with the vacuum area being attributed to different time scales between flow and geomechanics.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Minh Tam, George Thomas, Dmitry S. Golubev
Summary: We investigate a heat valve based on a SQUID coupled to resonators and find that the heat current modulation depends on the coupling strength. In the weak coupling regime, the modulation grows as the coupling strength squared, but in the intermediate coupling, it is strongly suppressed due to the resonant nature of the heat transport. At very strong coupling, the heat modulation grows again and saturates at a constant value.
Article
Energy & Fuels
Suman Saurabh, Satya Harpalani
Summary: Microbial conversion of coal to methane is a promising technology for transitioning coal-based energy towards natural gas recovery. Experimental investigation and numerical simulation showed that bioconversion can lead to increased permeability, decreased coal strength, and potentially enhance the prospect of field application of the technology.
Review
Computer Science, Interdisciplinary Applications
Sergi Molins, Cyprien Soulaine, Nikolaos I. Prasianakis, Aida Abbasi, Philippe Poncet, Anthony J. C. Ladd, Vitalii Starchenko, Sophie Roman, David Trebotich, Hamdi A. Tchelepi, Carl I. Steefel
Summary: This study introduces a benchmark problem for evaluating the simulation of single-phase flow, reactive transport, and solid geometry evolution at the pore scale. By comparing results from five different codes, it demonstrates significant agreement both quantitatively and qualitatively, providing a strong benchmark for validating and testing pore-scale codes.
COMPUTATIONAL GEOSCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Ammar H. Alali, Francois P. Hamon, Bradley T. Mallison, Hamdi A. Tchelepi
Summary: Investigating the use of discrete interface conditions at the matrix-fracture interface to improve flux computation accuracy without extreme grid refinement. Analyzing the interaction of the upwinding scheme with discrete interface conditions and illustrating the importance of interface conditions in accurately capturing matrix-fracture flux and flow dynamics representation.
COMPUTATIONAL GEOSCIENCES
(2021)
Article
Computer Science, Interdisciplinary Applications
Yashar Mehmani, Nicola Castelletto, Hamdi A. Tchelepi
Summary: This study introduces a pore-level multiscale method that efficiently approximates direct numerical simulation with controllable accuracy for predicting the elastic response of solid media containing cracks or defects.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Sebastian B. M. Bosma, Francois P. Hamon, Brad T. Mallison, Hamdi A. Tchelepi
Summary: In subsurface multiphase flow simulations, poor performance of nonlinear solvers is a significant issue, but a new optimized scheme can greatly reduce the number of nonlinear iterations and improve efficiency.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Jihoon Kim, Joo Yong Lee, Tae Woong Ahn, Hyun Chul Yoon, Jaehyung Lee, Sangcheol Yoon, George J. Moridis
Summary: In this study, we validate a coupled flow-geomechanics simulator called T+M-AM for gas hydrate deposits. Two laboratory experiments are conducted to replicate the production of gas hydrates by depressurization in the Ulleung Basin. The results show that T+M-AM is a reliable simulator for strongly coupled flow and geomechanics systems in both permafrost and deep oceanic hydrate deposits.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Petroleum
I Shovkun, H. A. Tchelepi
Summary: The study aims to develop a spatial discretization scheme that cuts the matrix grid with fracture planes to model fluid flow and mechanical deformation in fractured reservoirs. It utilizes traditional formulations and numerical harmonic shape functions to accurately describe the behavior of fractured formations. The proposed approach is validated and compared with existing methods, demonstrating its feasibility and effectiveness.
Article
Energy & Fuels
Hyun Chul Yoon, Jihoon Kim, Evan Schankee Um, Joo Yong Lee
Summary: This study investigates the feasibility of using electromagnetic geophysics methods to detect gas hydrate dissociation in the Ulleung Basin, East Sea, Korea. Flow and geomechanics simulations were performed and the electrical conductivity model for electromagnetic simulation was established based on the obtained saturation and porosity fields. Two different approaches in the electromagnetic configuration were compared, and it was found that the surface-to-borehole method showed improved sensitivity in monitoring gas flow. This integrated simulation can be a potential tool for monitoring gas hydrate deposits.
Article
Computer Science, Interdisciplinary Applications
Andrea Franceschini, Nicola Castelletto, Joshua A. White, Hamdi A. Tchelepi
Summary: In this paper, a family of preconditioning strategies for the contact problem in fractured and faulted porous media is presented. The strategies combine low-order continuous finite elements and piecewise constant Lagrange multipliers to simulate bulk deformation and impose frictional contact constraints. A novel jump stabilization technique is introduced to improve previous work, and scalable preconditioning strategies that exploit the block structure of the Jacobian matrix are designed. The proposed preconditioners achieve success by eliminating the Lagrange multiplier degrees of freedom and efficiently solving the pseudo-Schur complement. Numerical results demonstrate the theoretical properties, scalability, and robustness of the preconditioner, along with a comparison to other approaches in the literature.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Bazyli Klockiewicz, Leopold Cambier, Ryan Humble, Hamdi Tchelepi, Eric Darve
Summary: This paper presents a second-order accurate approach to sparsify the off-diagonal matrix blocks in solving sparse linear systems. By sparsifying the fill-in matrix blocks in block Gaussian elimination, an approximate factorization of the given matrix is computed. The new approach incorporates squared 2-norm of the incurred error in the sparsification of a matrix block, resulting in faster convergence and improved overall performance of the algorithm.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2022)
Article
Electrochemistry
Weiyu Li, Hamdi A. Tchelepi, Yiguang Ju, Daniel M. Tartakovsky
Summary: Dendritic growth is a major cause of degradation and failure in lithium-metal batteries. This study shows that changes in the local electric field and the use of anisotropic electrolytes can suppress dendritic growth of lithium metal.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
George J. Moridis, Jihoon Kim, Matthew T. Reagan, Se-Joon Kim
Summary: This study investigates the feasibility of long-term production from a marine hydrate accumulation in the Ulleung Basin in the Korean East Sea. The analysis shows that production from this hydrate accumulation is technically possible, although gas production rates are generally low and there is a high water-to-gas ratio. Additionally, there are uncertainties in the predictions of the geomechanical system's behavior. The long-term production potential of the reservoir appears challenging due to limited dissociation effectiveness, significant water production, and substantial subsidence.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Ricardo H. Deucher, Hamdi A. Tchelepi
Summary: The Adaptive Implicit Method (AIM) is a technique that reduces computational costs in simulations of field scale displacements in porous media. By using a mixed implicit/explicit time discretization and high-order fluxes, AIM overcomes limitations of purely explicit approaches and improves accuracy. A new scheme is introduced that blends implicit and explicit time discretizations along with single-point upwind and a high-order flux-limited total variation diminishing approximation of numerical fluxes, resulting in reduced numerical diffusion and improved accuracy.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Jiawei Li, Pavel Tomin, Hamdi Tchelepi
Summary: There is an increasing interest in developing robust and efficient sequential methods for reservoir simulation. The sequential fully implicit Newton (SFIN) method addresses the slow sequential coupling convergence issue when flow and transport problems are strongly coupled. However, the original SFIN algorithm requires fixed primary variables during the simulation. In this work, strategies are proposed to handle inconsistent primary variables and extend the SFIN method to the natural black-oil formulation.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Computer Science, Interdisciplinary Applications
Mamadou N'diaye, Francois P. Hamon, Hamdi A. Tchelepi
Summary: This work focuses on the development of a two-step field-split nonlinear preconditioner to accelerate the convergence of two-phase flow and transport in heterogeneous porous media. The proposed Field-Split Multiplicative Schwarz Newton (FSMSN) algorithm consists of a preconditioning step and a global step, achieving faster convergence compared to existing preconditioners and standard solution strategies. The impact of the upwinding scheme and the dynamic adaptation of subproblem tolerance in the preconditioning step are highlighted.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Catherine Spurin, Gareth G. Roberts, Conor P. B. O'Malley, Takeshi Kurotori, Samuel Krevor, Martin J. Blunt, Hamdi Tchelepi
Summary: Complex pore-scale dynamics during multiphase flow through porous rocks are not accounted for in large-scale models. However, we demonstrate that pressure fluctuations measured at the core-scale can reflect fluid displacements at the pore-scale. The spectral characteristics of pressure data provide information about flow dynamics, sample size, and rock heterogeneity. Understanding fluid flow in porous rocks is crucial for the safe storage of CO2 and hydrogen.
GEOPHYSICAL RESEARCH LETTERS
(2023)