Towards Large-scale Modelling of Fluid Low in Fractured Porous Media PDF Download

Author: Hamidreza Maghami Nick
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Hamidreza Maghami Nick
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309049962
Category : Science
Languages : en
Pages : 568

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Book Description
Scientific understanding of fluid flow in rock fracturesâ€"a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storageâ€"has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.

Author: Pierre M. Adler
Publisher: Oxford University Press, USA
ISBN: 0199666512
Category : Science
Languages : en
Pages : 184

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Book Description
This book provides a systematic treatment of the geometrical and transport properties of fractures, fracture networks, and fractured porous media. It is divided into two major parts. The first part deals with geometry of individual fractures and of fracture networks. The use of the dimensionless density rationalizes the results for the percolation threshold of the networks. It presents the crucial advantage of grouping the numerical data for various fracture shapes. The second part deals mainly with permeability under steady conditions of fractures, fracture networks, and fractured porous media. Again the results for various types of networks can be rationalized by means of the dimensionless density. A chapter is dedicated to two phase flow in fractured porous media.

Author: Richeng Liu
Publisher: MDPI
ISBN: 3039214233
Category : Technology & Engineering
Languages : en
Pages : 578

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Book Description
The fluid flow in fracture porous media plays a significant role in the assessment of deep underground reservoirs, such as through CO2 sequestration, enhanced oil recovery, and geothermal energy development. Many methods have been employed—from laboratory experimentation to theoretical analysis and numerical simulations—and allowed for many useful conclusions. This Special Issue aims to report on the current advances related to this topic. This collection of 58 papers represents a wide variety of topics, including on granite permeability investigation, grouting, coal mining, roadway, and concrete, to name but a few. We sincerely hope that the papers published in this Special Issue will be an invaluable resource for our readers.

Author: Peter Dietrich
Publisher: Springer Science & Business Media
ISBN: 3540270124
Category : Science
Languages : en
Pages : 455

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Book Description
This book addresses the characterization of flow and transport in porous fractured media from experimental and modeling perspectives. It provides a comprehensive presentation of investigations performed and analyzed on different scales.

Author: Muhammad Sahimi
Publisher: John Wiley & Sons
ISBN: 3527636706
Category : Science
Languages : en
Pages : 635

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Book Description
In this standard reference of the field, theoretical and experimental approaches to flow, hydrodynamic dispersion, and miscible displacements in porous media and fractured rock are considered. Two different approaches are discussed and contrasted with each other. The first approach is based on the classical equations of flow and transport, called 'continuum models'. The second approach is based on modern methods of statistical physics of disordered media; that is, on 'discrete models', which have become increasingly popular over the past 15 years. The book is unique in its scope, since (1) there is currently no book that compares the two approaches, and covers all important aspects of porous media problems; and (2) includes discussion of fractured rocks, which so far has been treated as a separate subject. Portions of the book would be suitable for an advanced undergraduate course. The book will be ideal for graduate courses on the subject, and can be used by chemical, petroleum, civil, environmental engineers, and geologists, as well as physicists, applied physicist and allied scientists that deal with various porous media problems.

Author: Mohammed Ghalib A. Alhashim
Publisher:
ISBN:
Category :
Languages : en
Pages : 586

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Book Description
The injection of a high pressure fluid in a porous medium to activate pre-existing fractures is commonly used in the development of stimulated shale gas formations and engineered geothermal systems (EGS). Understanding the coupling between fluid transport and the activation of the fractures is essential in optimizing the stimulation process and modeling convective transport in hydraulically stimulated reservoirs. Based on the assumption that a fracture slips and activates when the fluid pressure is larger than a critical value that depends on the fracture's orientation with respect to the principal stress field, the effects of stress anisotropy, injection conditions, and the connectivity of the pre-existing fractures on the morphology of the cluster of activated fractures are analyzed. Depending on the importance of the viscous pressure drop, three growth regimes denoted as the homogenous, fractal, and intermediate regimes are identified. In the fractal and intermediate regimes, the injected fluid propagates in a preferred direction when the pre-existing fractures are well-connected and the tendency of stress anisotropy to activate favorably oriented fractures becomes pronounced. In the homogeneous regime, the viscous pressure drop is negligible over the correlation length of the pre-existing fractures but is important over the size of the stimulated reservoir. In this regime, the effects of stress anisotropy are overcome by the viscous forces and a homogeneous cluster is formed whose growth follows an isotropic linear diffusion equation. In the fractal regime, the viscous pressure drop is negligible over the size of the stimulated region. Thus, the injected fluid activates and flows through the least resistance accessible fractures forming a fractal network. For poorly connected pre-existing fractures, the activation process belongs to the same universality class as random percolation. Using large-cell Monte Carlo renormalization group, a cross-over that does not change the universality class is identified as the radius of cluster exceeds the correlation length of the pre-existing fractures. An interesting intermediate regime develops when the viscous pressure drop is negligible over length scales that are larger than the pre-existing fractures' correlation length but is important over the stimulated reservoir. In this regime, the network is fractal at small length scales but is heterogeneous at larger scales. For poorly connected pre-existing fractures where the effects of stress anisotropy are negligible, a continuum model of fluid transport in the cluster of activated fractures is developed where percolation theory is used to relate the effective porosity and permeability of the network to the local fluid pressure. The model is tested using a discrete fracture network simulations. Finally, these insights about the connectivity of activated fractures are applied to analyze the thermal draw-down of EGS systems. It is shown that the properties of the shortest path such as its average residence time and the frequency of exchanging fluid flowing through it with other intersecting paths control the thermal drawdown. A homogeneous network performs the best followed by a fractal cluster; an intermediate network has the poorest performance.

Author: Jun Yao
Publisher: Springer
ISBN: 3662550326
Category : Science
Languages : en
Pages : 253

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This book solves the open problems in fluid flow modeling through the fractured vuggy carbonate reservoirs. Fractured vuggy carbonate reservoirs usually have complex pore structures, which contain not only matrix and fractures but also the vugs and cavities. Since the vugs and cavities are irregular in shape and vary in diameter from millimeters to meters, modeling fluid flow through fractured vuggy porous media is still a challenge. The existing modeling theory and methods are not suitable for such reservoir. It starts from the concept of discrete fracture and fracture-vug networks model, and then develops the corresponding mathematical models and numerical methods, including discrete fracture model, discrete fracture-vug model, hybrid model and multiscale models. Based on these discrete porous media models, some equivalent medium models and methods are also discussed. All the modeling and methods shared in this book offer the key recent solutions into this area.

Author: Martin A. Diaz Viera
Publisher: CRC Press
ISBN: 041566537X
Category : Mathematics
Languages : en
Pages : 372

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Book Description
Porous media are broadly found in nature and their study is of high relevance in our present lives. In geosciences porous media research is fundamental in applications to aquifers, mineral mines, contaminant transport, soil remediation, waste storage, oil recovery and geothermal energy deposits. Despite their importance, there is as yet no complete understanding of the physical processes involved in fluid flow and transport. This fact can be attributed to the complexity of the phenomena which include multicomponent fluids, multiphasic flow and rock-fluid interactions. Since its formulation in 1856, Darcy’s law has been generalized to describe multi-phase compressible fluid flow through anisotropic and heterogeneous porous and fractured rocks. Due to the scarcity of information, a high degree of uncertainty on the porous medium properties is commonly present. Contributions to the knowledge of modeling flow and transport, as well as to the characterization of porous media at field scale are of great relevance. This book addresses several of these issues, treated with a variety of methodologies grouped into four parts: I Fundamental concepts II Flow and transport III Statistical and stochastic characterization IV Waves The problems analyzed in this book cover diverse length scales that range from small rock samples to field-size porous formations. They belong to the most active areas of research in porous media with applications in geosciences developed by diverse authors. This book was written for a broad audience with a prior and basic knowledge of porous media. The book is addressed to a wide readership, and it will be useful not only as an authoritative textbook for undergraduate and graduate students but also as a reference source for professionals including geoscientists, hydrogeologists, geophysicists, engineers, applied mathematicians and others working on porous media.