The equations governing the flow of fluid through fractured porous media are derived. The classical equations on the darcy scale are presented as well as the van genuchten constitutive relations for the relative permeabilities and the capillary pressure. A fractal permeability model for 2d complex tortuous. Pdf fluid flow modeling through fractured porous medium.
This book is a printed edition of the special issue fluid flow in fractured porous media that was published in processes. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Hence, the main unknowns of the problem are the pressure. In the following, a brief discussion of the representation of individual fractures and fracture networks in a fractured porous. Thermal convection in threedimensional fractured porous media. In this study we propose a novel phase field based discrete fracture model pfdfm to simulate fluid flow in fractured porous media. The partitioning of the flow domain into computational volume elements is based on the criterion of approximate thermodynamic. Then the discrete fractured model was applied to the two different type fractured porous media. Gasoil gravity drainage is considered to be one of the most dependable recovery mechanisms in naturally fractured reservoirs. Because the fluid flow in fractured rocks is controlled by complex fractures, the fracture structures need to be characterized.
An opensource software for simulation of multiphysics processes in fractured porous media eirik keilegavlen1, runar berge1, alessio fumagalli1, michele starnoni1, ivar stefansson1, jhabriel varela1, inga berre1 1department of mathematics, university of bergen. In some numerical approaches, the mass transfer is lumped at the nodes common to the fracture and porous medium grids. The special issue fluid flow in fractured porous media has been closed on 31 december 2018, in which a total of 58 papers are collected from di. Numerical study on twophase flow through fractured porous. Applications to the simulation of pressure drawdown well tests are presented, for complex situations where the well intercepts a random fracture network with various fracture. For a porous medium, secondary permeability provided by conductive fractures can result in an effective permeability several magnitudes larger. Modelling and benchmarking benchmarking initiatives 25thnovember2015 springer. Fracture in porous media is geometrically complex, and for this reason, the use of isogeometric analysis iga for the analysis of ow in fractured porous media can have advantages. This study investigated a possibility that the sizes of nanomicroparticle can be used to extract new information on structures in a fractured medium. Pdf multiphaseflow properties of fractured porous media.
A multiscale darcybrinkman model for fluid flow in. The common discrete fracture models represent fractures by sharp topology in an explicit way, regardless of using conforming or nonconforming mesh. A model for coupled geomechanics and multiphase flow in fractured porous media using embedded meshes article pdf available in advances in water resources 122 october 2018 with 362 reads. In the fm approach, an element intersected by a fracture is treated as a superposition of two elements, namely a matrix element and a fracture element. A model for coupled geomechanics and multiphase flow in fractured porous media using embedded meshes article pdf available in advances in water resources 122. A multiple interacting continua method minc is presented which is applicable for numerical simulation of heat and multiphase fluid flow in multidimensional, fractured porous media. Analysis of thermohydromechanicalchemical thmc processes is essential to a wide area of applications in environmental. Pdf recent advances in fluid flow in fractured porous media. Acousticmicroseismic emissions ae in naturally fractured porous media are the result of local instability along internal interfaces and the sudden release of strain energy stored in the rock matrix. In this method, spline functions bsplines and nurbs, that are commonly used in computeraided design cad to describe the ge.
The numerical results showed that the fractures made the porous media more heterogeneous and anisotropic, and that the orientation, size, type of fracture and the. This paper presents several test cases intended to be benchmarks for numerical schemes for singlephase fluid flow in fractured porous media. Historically, this complex situation was first addressed by. The production mechanism is as a result of the density difference between the phases and capillary contrast between. Thermohydromechanical chemical processes in fractured. Flow and transport in porous media and fractured rock. Computational modelling of isothermal consolidation of. Pdf the last decade has seen a strong increase of research into flows in fractured porous media, mainly related to subsurface processes, but. Fluid flow in fractured porous media book set mdpi books. Introduction the large disparity in hydraulic behavior between fractures and matrix in unsaturated fractured porous media fpm pre sents practical and theoretical challenges to modeling of total system response glass et al.
On the basis of experimental data and empirical correlations, the matrix. Fractures are highly conductive channels for flow among all types of porouspermeable media, flow through them can vary widely depending on different fracture. These equations consist of darcys law for fluid flow in the primary pores, equations of motion. Controlvolume method for numerical simulation of two. We address the case of fractures whose thickness is very small compared to the characteristic diameter of. Some numerical details are given, but basically the same finite volume technique is used. Flow and transport in fractured porous media download.
Fractures are randomly inserted as twodimensional 2d convex polygons. Pdf transient flow in discretely fractured porous media. The aim of this work is to present a reduced mathematical model for describing fluid flow in porous media featuring open channels or fractures. Research on fluid flow in fractures and in fractured porous media.
Tracer testing has been conducted to evaluate flow properties, such as connectivity, flow velocity, and dispersivity. Twophase flow through fractured porous media oxford. Fluid mass transfer between porous media and fractures occur at the fracture porous medium interface. Benchmarks for singlephase ow in fractured porous media. Flow in fractured porous media is investigated by a direct, exact and complete numerical solution of the flow equations for arbitrary distributions of permeabilities in the porous matrix and in. Feflow is an acronym of finite element subsurface flow simulation system and solves the governing flow, mass and heat transport equations in porous and fractured media by a multidimensional finite element method for complex geometric and parametric situations including variable fluid density. Pressure drawdown well tests in fractured porous media. Multiphaseflow properties of fractured porous media. Pdf contaminant transport in fractured porous media. This book aims to estimate the macroscopic properties of fractures, fracture networks and fractured porous media from easily measurable quantities. Fluid flow in fractured and fracturing porous media. Our formulation is agnostic to the discretizations used to discretize the fluid flow equations in the porous medium and in the fractures, and as such it represents a.
The main motivation of our work relates to fractured hydrocarbon formations which provide around 20 percent of world oil and gas production. The volume explores porous media problems, from the origin of the present natural porous structures, to their characterization, and various flow and transport phenomena that exist within the porous media. Asymptotic and numerical modelling of flows in fractured porous media philippe angot1, franck boyer1 and florence hubert1 abstract. The porous medium and the fractures are envisioned as two separate but overlapping continua. Nguyen, atomic energy control board1, ottawa, canada abstract the presence of discontinuities such as joints can significantly influence the. Numerical simulation of fluidsolid coupling in fractured.
Experimental investigation on the law of grout diffusion in fractured porous rock mass and its application previous article in journal natural products extraction of the futuresustainable manufacturing solutions for societal needs. Mdpi books library fluid flow in fractured porous media. Understanding mechanisms of fluid flow in fractured porous media is essential for geoscientific research. Effective permeability of fractured porous media in steady state flow. The remainder of this paper is organized as follows. Two different approaches are discussed and contrasted with each other. Pdf homogenization of reactiondiffusion equations in. Simulation of induced acoustic emission in fractured. Selvadurai, department or civil engineering and applied mechanics, mcgill university, montreal, canada t.
Flow and transport in fractured porous media springerlink. Analytical solutions for a system of parallel fractures. This rapid release of energy, stimulates highfrequency components of the dynamic response of the rock mass, inducing mechanical wave propagation. In this fashion, the possibility has been opened to analyse deformation and fluid flow in large formations that contain multiple cracks. Thermohydromechanicalchemical processes in fractured. Pdf the last decade has seen a strong increase of research into flows in fractured porous media, mainly related to subsurface processes but. The empirical model approach was then extended to predict the matrix. We assume that the fractures and pores are equidistributed and that the coefficients of the equations are. Experimental study on nanomicroparticles transport to. This site is like a library, use search box in the widget to get ebook that you want. 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.
Pdf a practical method for modeling fluid and heat flow. Thermal convection is numerically computed in threedimensional 3d fluid saturated isotropically fractured porous media. Pdf gasoil gravity drainage in fractured porous media. The matrix element and fracture element interact via a transfer function. The darcys law is assumed in the porous domain while the stokesbrinkman equations are considered in the fractures. Hence, when a fluid is flowing through such a medium, the fractures and the porous matrix interact.
Nano and microparticles are expected to have several functionalities, and the ability to control size and shape is an advantage of using nanomicroparticles. This study concerns some asymptotic models used to compute the. Asymptotic and numerical modelling of flows in fractured. The book comprises the 3rd collection of benchmarks and examples for porous and fractured media mechanics. View the article pdf and any associated supplements and figures for a period of 48 hours. Modelling fluid flow and heat transport in fractured porous media. This book addresses the characterization of flow and transport in porous fractured media from experimental and modeling perspectives. This book is a printed edition of the special issue fluid flow in fractured porous media that was published in processes download pdf add this book to my library. Feflow finite element modeling of flow, mass and heat. Attention is focused on geological media where rocks are necessarily fractured at various scales by the slow but constant motion of continental masses. In this work, we aimed at developing a method to evaluate rock structures in fractured porous media.
Empirical modeling of gravity drainage in fractured porous. Asymptotic and numerical modelling of flows in fractured porous media 241 a porous medium described by the mass conservation equation and the darcy law. Description the paper deals with the homogenization of reactiondiffusion equations with large reaction terms in a multiscale porous medium. A phase field based discrete fracture model pfdfm for. In fractured porous media, dualporosity effects appear only when the characteristic times of the involved physical processes are very different in the porous matrix and in the fractures. Pdf a model for coupled geomechanics and multiphase flow. Twophase flow through fractured porous media request pdf. This method is a generalization of the doubleporosity concept. Chapter 7 provides some preliminary results on two phase flows in fractured porous media.
Both vertical openhole wells and hydraulically fractured vertical wells are. Computational modelling of isothermal consolidation of fractured porous media a. However, due to the complex and uncertain geometric properties of rock masses in deep underground, deep studies on the fluid flow in fractured porous media such as permeability prediction andor. About thermohydromechanicalchemical processes in fractured porous media modelling and benchmarking.
A fractured porous medium has throughout its extent a system of interconnected fractures dividing the medium into a series of essentially disjoint blocks of porous rock, called the matrix blocks cf. The last decade has seen a strong increase of research into flows in fractured porous media, mainly related to subsurface processes. A number of solution strategies are compared, including a vertex and two cellcentred finite volume methods, a nonconforming embedded discrete fracture model, a primal and a dual extended finite element formulation, and a mortar discrete fracture. Fractures are highly conductive channels for flow among all types of porous permeable media, flow through them can vary widely depending on different fracture. Fluid flow modeling through fractured porous medium saurabh dattagupta and chandan kumar mishra deptt. Twophase flow in fractured porous media is investigated by means of a direct and complete numerical solution of the generalized darcy equations in a threedimensional discrete fracture. The effect of fractures on the water flooding in fractured reservoirs was investigated. Particle transport in fractured porous media was visualized by using the micromodel. Click download or read online button to get flow and transport in fractured porous media book now. Unified approach to discretization of flow in fractured porous media.
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