The Experimental Determination Of Pore Scale Interfacial Velocities For Immiscible Displacement In A Porous Medium
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The Experimental Determination Of Pore Scale Interfacial Velocities For Immiscible Displacement In A Porous Medium
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Author : Michael James Oliver
language : en
Publisher:
Release Date : 2004
The Experimental Determination Of Pore Scale Interfacial Velocities For Immiscible Displacement In A Porous Medium written by Michael James Oliver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Experimentally Determined Interfacial Area Between Immiscible Fluids In Porous Media
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Author :
language : en
Publisher:
Release Date : 2008
Experimentally Determined Interfacial Area Between Immiscible Fluids In Porous Media written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
When multiple fluids flow through a porous medium, the interaction between the fluid interfaces can be of great importance. While this is widely recognized in practical applications, numerical models often disregard interactios between discrete fluid phases due to the computational complexity. And rightly so, for this level of detail is well beyond most extended Darcy Law relationships. A new model of two-phase flow including the interfacial area has been proposed by Hassarizadeh and Gray based upon thermodynamic principles. A version of this general equation set has been implemented by Nessner and Hassarizadeh. Many of the interfacial parameters required by this equation set have never been determined from experiments. The work presented here is a description of how the interfacial area, capillary pressure, interfacial velocity and interfacial permeability from two-phase flow experiments in porous media experiments can be used to determine the required parameters. This work, while on-going, has shown the possibility of digitizing images within translucent porous media and identifying the location and behavior of interfaces under dynamic conditions. Using the described methods experimentally derived interfacial functions to be used in larger scale simulations are currently being developed. In summary, the following conclusions can be drawn: (1) by mapping a pore-throat geometry onto an image of immiscible fluid flow, the saturation of fluids and the individual interfaces between the fluids can be identified; (2) the resulting saturation profiles of the low velocity drainage flows used in this study are well described by an invasion percolation fractal scaling; (3) the interfacial area between fluids has been observed to increase in a linear fashion during the initial invasion of the non-wetting fluid; and (4) the average capillary pressure within the entire cell and representative elemental volumes were observed to plateau after a small portion of the volume was invaded.
Pore Scale Experimental Investigations Of Immiscible Displacements In Capillary Tubes And Porous Micromodels
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Author : Mohammad Heshmati
language : en
Publisher:
Release Date : 2017
Pore Scale Experimental Investigations Of Immiscible Displacements In Capillary Tubes And Porous Micromodels written by Mohammad Heshmati and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Fluid dynamics categories.
Owing to the complicated nature of a porous medium, study of dynamics of fluid flow in such structures is not straightforward. Therefore, researchers have been using simplified one-dimensional (1D) and two-dimensional (2D) porous media models like capillary tubes, micro-models and micro-fluidic devices to perform such studies. We utilized both of these categories to investigate different parameters affecting the flow of fluids in a porous medium. In 1D, capillary tubes of different cross-sectional shapes and several wetting fluids are used to investigate the evolution of dynamic contact angle with the meniscus velocity. The meniscus rise vs. time curves produced by Washburn's equation are improved by implementing our experimentally measured dynamic contact angle values into the Washburn's original equation. A general empirical correlation is presented for variation of normalized rise with dynamic contact angle as well. In the second category, a novel two-phase, two-field-of-view micro-Particle-Image-Velocimetry system is developed. It allows simultaneous study of flow fields at the pore- and micromodel-scales and provides a deeper insight into the distribution of fluids. The effect of change of flow rate on shear stress at the interface of invading and defending fluids in a designed pore-doublet configuration made of Polydimethylsiloxane (PDMS) is studied. The impact of local perturbations of velocity fields on displacement of non-wetting phase and the residual trapping is also discussed. We show that these effects produce extensively different distributions of the trapped non-wetting phase globules. A modified 2D X-ray micro-computed tomography image of Bentheimer sandstone is replicated on PDMS. Single-phase velocity measurements in these models afford valuable insights into the complicated flow patterns through a porous medium; whereas in two-phase flow tests, in addition to resolving the velocity fields in both fluids, effects of changes in invading wetting phase flow rate and viscosity on pore fluid configuration and residual trapping is investigated as well. Not only these results provide a valuable understanding of the complexities of flow through porous systems, but also they can be used to validate the numerical models of fluid flow through porous systems.
Porous Media Fluid Transport And Pore Structure
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Author : F Dullien
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Porous Media Fluid Transport And Pore Structure written by F Dullien and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
Porous Media: Fluid Transport and Pore Structure presents relevant data on the role of pore structure in terms of transport phenomena in pore spaces. The information is then applied to the interpretation of various experiments and results of model calculations. This book emphasizes the discussion of ""flow through porous media"" in terms of interactions among the three main factors. These factors are transport phenomena, interfacial effects, and pore structure. An introductory chapter opens the text and presents some of the basic concepts and terms that will be encountered all throughout. Chapters 2 to 4 focus on the important foundations of the physical phenomena as applied in the pore space of porous media. These foundations are capillarity, pore structure, and single phase flow and diffusion. Chapters 5 to 7 discuss more in detail the different applications of pore structure to various operations and processes. Some of the concepts covered in this part of the book include flow and/or diffusion through a porous medium, simultaneous flow of immiscible fluids and immiscible displacement, and miscible displacement and hydrodynamic dispersion. This book is a good reference to students, scientists, and engineers in the field of chemistry, physics, and biology.
Porous Media
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Author : F. A.L. Dullien
language : en
Publisher: Academic Press
Release Date : 2012-12-02
Porous Media written by F. A.L. Dullien and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
This book examines the relationship between transport properties and pore structure of porous material. Models of pore structure are presented with a discussion of how such models can be used to predict the transport properties of porous media. Portions of the book are devoted to interpretations of experimental results in this area and directions for future research. Practical applications are given where applicable, and are expected to be useful for a large number of different fields, including reservoir engineering, geology, hydrogeology, soil science, chemical process engineering, biomedical engineering, fuel technology, hydrometallurgy, nuclear reactor technology, and materials science. Presents mechanisms of immiscible and miscible displacement (hydrodynamic dispersion) process in porous media Examines relationships between pore structure and fluid transport Considers approaches to enhanced oil recovery Explores network modeling and perolation theory
Pore Scale Microstructure Mechanisms And Models For Subsurface Flow And Transport
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Author : James E. McClure
language : en
Publisher: Frontiers Media SA
Release Date : 2022-11-29
Pore Scale Microstructure Mechanisms And Models For Subsurface Flow And Transport written by James E. McClure and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-29 with Science categories.
Multiphase Flow In Permeable Media
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Author : Martin J. Blunt
language : en
Publisher: Cambridge University Press
Release Date : 2017-02-16
Multiphase Flow In Permeable Media written by Martin J. Blunt and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-02-16 with Science categories.
This book provides a fundamental description of multiphase fluid flow through porous rock, based on understanding movement at the pore, or microscopic, scale.
Pore Space Deformation And Its Implications For Multiphase Flow Through Porous Media Under Various Wettability Conditions
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Author : Rui Wang
language : en
Publisher:
Release Date : 2022
Pore Space Deformation And Its Implications For Multiphase Flow Through Porous Media Under Various Wettability Conditions written by Rui Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Multiphase flow categories.
Pore space deformation significantly affects multiphase flow behavior in porous media. It alters the distribution of fluids at the pore scale which in turn leads to changes in the effective permeability, relative permeability, capillary pressure, etc. However, due to the lack of fundamental studies on the mechanisms correlating the pore-level fluid displacements with the pore space deformation, no compelling conclusions have been reached to account for the observed effects. To explore this correlation, a series of carefully characterized unsteady- and steady-state two-phase core-flooding experiments were performed on miniature sandpack samples under varying stress conditions while the pore space was being imaged using high-resolution x-ray microtomography techniques to acquire three-dimensional pore fluid configuration maps. In these studies, the deformation of the sandpack samples was characterized at both macro and micro scales. The impact of deformation on the frequency of various pore-scale fluid displacement mechanisms as well as fluid saturations and volumes during different flow processes (drainage and imbibition) were also investigated. Changes in the multiphase flow behavior, such as fluid velocity and pressure, were evaluated through direct simulations, which used a finite volume method to solve Navier-Stoke equations. Moreover, the variations in the in-situ capillary pressure caused by the pore space deformation were explored through interfacial curvature analysis. The relationship between relative permeabilities and effective stress was probed. Finally, in connection to the geological storage of carbon dioxide in deep saline aquifers, the impact of pore space deformation on residual trapping and dissolution of supercritical CO2 in brine saturated sandpacks was carefully examined through micro-scale flow experiments conducted under varying stress conditions. It was observed that in a water-wet porous medium, unsteady-state drainage can be both strengthened due to the higher fluid velocity and weakened by the increase in the threshold capillary pressure after the pore space contraction. By contrast, unsteady imbibition was affected solely by variations in the threshold capillary pressure and, consequently, was facilitated as the pore sizes reduced. During the steady-state core-flooding tests, additional drainage and imbibition displacements were triggered by the pore space expansion and contraction, respectively. Furthermore, it was found that wettability was one of the key properties that governed the impact of pore space deformation on the multiphase flow behavior in porous media. The wetting phase hydraulic conductivity was more sensitive to the pore space deformation than that of the non-wetting phase, because of their topologically different distributions in the pore space. Consequently, the relative permeability of the wetting phase decreased with the increase in the effective stress, while that of the non-wetting phase increased. However, this behavior changed as the wettability of the porous medium was altered to a weakly oil-wet state through a dynamic aging process. These studies provided novel insights into the fluid flow behavior in unconsolidated porous media under varying stress conditions, which are of ever-increasing importance to many subsurface applications, including hydrocarbon recovery, water management, CO2 sequestration, and hydrogen storage.
Lattice Gas Methods For Partial Differential Equations
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Author : Gary Doolen
language : en
Publisher: CRC Press
Release Date : 2019-03-01
Lattice Gas Methods For Partial Differential Equations written by Gary Doolen and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-03-01 with Mathematics categories.
Although the idea of using discrete methods for modeling partial differential equations occurred very early, the actual statement that cellular automata techniques can approximate the solutions of hydrodynamic partial differential equations was first discovered by Frisch, Hasslacher, and Pomeau. Their description of the derivation, which assumes the validity of the Boltzmann equation, appeared in the Physical Review Letters in April 1986. It is the intent of this book to provide some overview of the directions that lattice gas research has taken from 1986 to early 1989.
Methods Of Soil Analysis Part 4
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Author : Jacob H. Dane
language : en
Publisher: John Wiley & Sons
Release Date : 2020-05-27
Methods Of Soil Analysis Part 4 written by Jacob H. Dane and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-27 with Technology & Engineering categories.
The best single reference for both the theory and practice of soil physical measurements, Methods, Part 4 adopts a more hierarchical approach to allow readers to easily find their specific topic or measurement of interest. As such it is divided into eight main chapters on soil sampling and statistics, the solid, solution, and gas phases, soil heat, solute transport, multi-fluid flow, and erosion. More than 100 world experts contribute detailed sections.