Download or read book Pore scale Analysis of Grain Shape and Sorting Effect on Fluid Transport Phenomena in Porous Media written by Tatyana Sergeevna Torskaya and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Macroscopic transport properties of porous media depend on textural rock parameters such as porosity, grain size and grain shape distributions, surface-to-volume ratios, and spatial distributions of cement. Although porosity is routinely measured in the laboratory, direct measurements of other textural rock properties can be tedious, time-consuming, or impossible to obtain without special methods such as X-ray microtomography and scanning electron microscopy. However, by using digital three-dimensional pore-scale rock models and physics-based algorithms researchers can calculate both geometrical and transport properties of porous media. Therefore, pore-scale modeling techniques provide a unique opportunity to explore explicit relationships between pore-scale geometry and fluid and electric flow properties. The primary objective of this dissertation is to investigate at the pore-scale level the effects of grain shapes and spatial cement distribution on macroscopic rock properties for improved understanding of various petrophysical correlations. Deposition and compaction of grains having arbitrary angular shapes and various sizes is modeled using novel sedimentation and cementation pore-scale algorithms. Additionally, the algorithms implement numerical quartz precipitation to describe preferential cement growth in pore-throats, pore-bodies, or uniform layers. Subsequently, petrophysical properties such as geometrical pore-size distribution, primary drainage capillary pressure, absolute permeability, streamline-based throat size distribution, and apparent electrical formation factor are calculated for several digital rock models to evaluate petrophysical correlations. Furthermore, two geometrical approximation methods are introduced to model irreducible (connate) water saturation at the pore scale. Consolidated grain packs having comparable porosities and grain size distributions but various grain shapes indicate that realistic angular grain shape distribution gives the best agreement of petrophysical properties with experimental measurements. Cement volume and its spatial distribution significantly affect pore-space geometry and connectivity, and subsequently, macroscopic petrophysical properties of the porous media. For example, low-porosity rocks having similar grain structure but different cement spatial distribution could differ in absolute permeability by two orders of magnitude and in capillary trapped water saturation by a factor of three. For clastic rocks with porosity much higher than percolation threshold porosity, pore-scale modeling results confirm that surface-to-volume ratio and porosity provide sufficient rock-structure character to describe absolute permeability correlations. In comparison to surface-to-volume ratio, capillary trapped (irreducible) water saturation exhibits better correlation with absolute permeability due to weak pore space connectivity in low-porosity samples near the percolation threshold. Furthermore, in grain packs with fine laminations and permeability anisotropy, pore-scale analysis reveals anisotropy in directional drainage capillary- pressure curves and corresponding amounts of capillary-trapped wetting fluid. Finally, results presented in this dissertation indicate that pore-scale modeling methods can competently capture the effects of porous media geometry on macroscopic rock properties. Pore-scale two- and three-phase transport calculations with fast computers can predict petrophysical properties and provide sensitivity analysis of petrophysical properties for accurate reservoir characterization and subsequent field development planning.

Download or read book Porous Media Fluid Transport and Pore Structure written by F Dullien and published by Elsevier. This book was released on 2012-12-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Porous Media written by F. A.L. Dullien and published by Academic Press. This book was released on 2012-12-02 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Pore Scale Phenomena Frontiers In Energy And Environment written by John M Poate and published by World Scientific. This book was released on 2015-04-09 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of pore scale phenomena is now emerging as one of the frontiers of science and many engineering disciplines. Transport phenomena in the subsurface of the earth play key roles in the energy and environmental domains. For example, the shale gas and oil boom is revolutionizing the world's energy portfolio. Pore scale phenomena from the nanoscale to mesoscale dominate the extraction of these resources. Similarly in the environmental domain, pore storage and pore-scale physics affect the availability of water resources and protecting its quality. Water flow and vapor transport in the pores near the land surface is critical to understanding soil water evaporation in the context of local and global hydrologic cycles affecting climate and climate change.Pore scale phenomena similarly play critical roles in the domain of materials science and biology. For example, many energy devices and membrane technologies are controlled by the physical and chemical properties of the pores. Identifying and analyzing the properties of these pores has emerged as a frontier of characterization science.This book provides, for the first time, a comprehensive overview of the fascinating interrelationship between engineering and science. The authors and contributors are recognized experts from the faculty of the Colorado School of Mines, Northwestern and Stanford. This book will appeal to earth and environmental scientists, materials scientists, physicists and chemists.

Download or read book Flow and Transformations in Porous Media written by Renaud Toussaint and published by Frontiers Media SA. This book was released on 2017-02-07 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid flow in transforming porous rocks, fracture networks, and granular media is a very active interdisciplinary research subject in Physics, Earth Sciences, and Engineering. Examples of natural and engineered processes include hydrocarbon recovery, carbon dioxide geo-sequestration, soil drying and wetting, pollution remediation, soil liquefaction, landslides, dynamics of wet or dry granular media, dynamics of faulting or friction, volcanic eruptions, gas venting in sediments, karst development and speleogenesis, ore deposit development, and radioactive waste disposal. Hydrodynamic flow instabilities and pore scale disorder typically result in complex flow patterning. In transforming media, additional mechanisms come into play: compaction, de-compaction, erosion, segregation, and fracturing lead to changes in permeability over time. Dissolution, precipitation, and chemical reactions between solutes and solids may gradually alter the composition and structure of the solid matrix, either creating or destroying permeable paths for fluid flow. A complex, dynamic feedback thus arises where, on the one hand, the fluid flow affects the characteristics of the porous medium, and on the other hand the changing medium influences the fluid flow. This Research Topic Ebook presents current research illustrating the depth and breadth of ongoing work in the field of flow and transformation in porous media through 15 papers by 72 authors from around the world. The body of work highlights the challenges posed by the vast range of length- and time-scales over which subsurface flow processes occur. Importantly, phenomena from each scale contribute to the larger-scale behavior. The flow of oil and gas in reservoirs, and the flow of groundwater on catchment scale is sensitively linked to pore scale processes and material heterogeneity down to the micrometer scale. The geological features of the same reservoirs and catchments evolved over millions of years, sometimes as a consequence of cracking and fracture growth occurring on the time scale of microseconds. The research presented by the authors of this Research Topic represents a step toward bridging the separation of scales as well as the separation of scientific disciplines so that a more unified picture of flow and transformation in porous media can start to emerge.

Download or read book Pore scale Observations of Three fluid phase Transport in Porous Media written by Kendra I. Brown and published by . This book was released on 2012 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the transport of three fluid phases through porous media has important applications in subsurface contaminant remediation, oil and gas recovery, and geological CO2 sequestration. Existing transport models may be improved by including physical phenomena that govern fluid flow at the pore scale. In particular, thermodynamic arguments suggest that hysteresis in the capillary pressure-saturation (P[subscript c]-S) relationship may be resolved by including an additional parameter, fluid-fluid interfacial area per volume (a[subscript nw]). Synchrotron-based Computed X-ray Microtomography (CMT) is a method that allows observation of fluid interfaces. Flow experiments were conducted using CMT to investigate uniqueness of the P[subscript c]-S[subscript w]-a[subscript nw] relationship in a porous media system containing three immiscible fluid phases. Drainage and imbibition surfaces were fit to P[subscript c]-S[subscript w]-a[subscript nw] data collected over a limited range of water saturations. The root-mean-square error (RMSE) between the drainage and imbibition surfaces was negligible, indicating that the P[subscript c]-S[subscript w]-a[subscript nw] relationship is unique. These results are a first step in validating the P[subscript c]-S[subscript w]-a[subscript nw] relationship for three-phase porous media systems. In addition, spreading intermediate-phase layers were observed to bring oil and solid into contact, which in the presence of X-rays changed the solid wettability within a relatively short time period. These observations confirm a proposed theoretical scenario that three-phase systems are more susceptible to wettability changes than to two-phase systems due to intermediate-phase spreading behavior.

Download or read book Mathematical Modeling of Associated Transport Phenomena in Hygroscopic Porous Media written by Driss Messaho and published by . This book was released on 1991 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pore scale Study of Non darcian Fluid Flow in Porous Media Using Smoothed particle Hydrodynamics written by Rakulan Sivanesapillai and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Equilibrium and Transfer in Porous Media 1 written by Jean-François Daïan and published by John Wiley & Sons. This book was released on 2014-04-16 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: A porous medium is composed of a solid matrix and its geometrical complement: the pore space. This pore space can be occupied by one or more fluids. The understanding of transport phenomena in porous media is a challenging intellectual task. This book provides a detailed analysis of the aspects required for the understanding of many experimental techniques in the field of porous media transport phenomena. It is aimed at students or engineers who may not be looking specifically to become theoreticians in porous media, but wish to integrate knowledge of porous media with their previous scientific culture, or who may have encountered them when dealing with a technological problem. While avoiding the details of the more mathematical and abstract developments of the theories of macroscopization, the author gives as accurate and rigorous an idea as possible of the methods used to establish the major laws of macroscopic behavior in porous media. He also illustrates the constitutive laws and equations by demonstrating some of their classical applications. Priority is to put forward the constitutive laws in concrete circumstances without going into technical detail. This first volume in the three-volume series focuses on fluids in equilibrium in the pore space; interfaces, the equilibrium of solutions and freezing in porous media; and gives experimental investigations of capillary behavior and porometry, and sorption and porometry.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1973 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pore scale Modelling of Transport Phenomena in Homogeneous Porous Media written by Gerhardus Petrus Jacobus Diedericks and published by . This book was released on 1999 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Grain Roughness on the Pore Scale Distribution of Immiscible Fluids in Porous Media written by Anelechi Ibekwe and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pore scale Study of Non darcian Fluid Flow in Porous Media Using Smoothing particle Hydrodynamics written by Rakulan Sivanesapillai and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pore scale Percolation Modeling of Two phase Flow in Granular Porous Media written by Tyson Strand and published by . This book was released on 2003 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Techniques of Pore scale Visualization of Fluids in Porous Media the Effect of Pore Structure in Fluid Distribution written by National Institute for Petroleum and Energy Research (Bartlesville, Okla.). and published by . This book was released on 1989 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pore scale Modeling of Particle Filtration in Porous Media written by Hongtao Yang (Ph. D.) and published by . This book was released on 2018 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle retention in porous media occurs in many natural and environmental settings, such as waste-water purification, contaminants dispersion, fines migration and more. In petroleum engineering, particle retention (e.g. drilling mud invasion, produced water re-injection, polymer retention) will induce permeability decline and formation damage. Existing macroscopic models often fail to be predictive without empirical adjustments. A predictive micro-scale model of particle filtration is of great significance to the control of formation damage and to the economical exploitation of hydrocarbon reservoirs. In this work, a Lagrangian pore network model has been developed for particle deposition. The model tracks the transport trajectory of each individual particle in porous media. It is able to capture the complex particle-surface interaction during deposition and has been validated against published experimental data. A new gravity number is developed to better scale the filtration coefficient. The particle size distribution is found to be one of the causes of hyperexponential deposition. The permeability decline not only depends on the volume of deposited particles, but also on the surface charge. In addition, an Eulerian pore network model has been developed for particle jamming in porous media. The probabilistic nature of jamming has been systematically studied using a Discrete Element Method (DEM). Based on the DEM simulations, a unified model for the jamming probability has been created, which is able to predict the effect of friction, pore/particle size ratio, and particle concentration on jamming. The numerical results achieved good agreement with direct CFD-DEM and particle flooding experiments. We then combine the Eulerian model with a deposition model to predict polymer adsorption and mechanical entrapment in porous media. The hydraulic conductivity of a fouled cylindrical tube is updated using models that are created based on CFD simulations. It is found that the longitudinal dispersivity is larger breakthrough curve broader than a Newtonian fluid for a power-law fluid with constant rheological properties. However, if the power-law parameters are functions of polymer concentration, the breakthrough curve is narrower than a Newtonian fluid because fluid is concentrated and thus more viscous in the fast flow paths. For particle retention, fluids with a high shear-thinning index result in more permeability reduction. For Bingham plastic fluids with concentration independent rheological properties, breakthrough occurs earlier as yield stress increases because the number of the dead-end or isolated pores increases. Compared with a Newtonian fluid, flow of a Bingham plastic fluid results in less jamming because particles are unable to enter the smaller pore throats that are closed to flow.

Download or read book Pore Scale Phenomena written by J. M. Poate and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The field of pore scale phenomena is now emerging as one of the frontiers of science and many engineering disciplines. Transport phenomena in the subsurface of the earth play key roles in the energy and environmental domains. For example, the shale gas and oil boom is revolutionizing the world's energy portfolio. Pore scale phenomena from the nanoscale to mesoscale dominate the extraction of these resources. Similarly in the environmental domain, pore storage and pore-scale physics affect the availability of water resources and protecting its quality. Water flow and vapor transport in the pores near the land surface is critical to understand soil water evaporation in the context of local and global hydrologic cycle affecting climate and climate change. Pore scale phenomena similarly play critical roles in the domain of materials science and biology. For example, many energy devices and membrane technologies are controlled by the physical and chemical properties of the pores. Identifying and analyzing the properties of these pores has emerged as a frontier of characterization science. This book provides, for the first time, a comprehensive overview of the fascinating interrelationship between engineering and science. The authors and contributors are recognized experts from the faculty of the Colorado School of Mines, Northwestern and Stanford. This book will appeal to earth and environmental scientists, materials scientists, physicists and chemists."--