Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Darcy Flow"”.
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Application of saturation dependent non-Darcy flow in gas reservoir engineering
Includes bibliographical references.
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Experimental characterization of the Barree and Conway (2004) single-phase non-Darcy flow model in various hydraulic fracturing sands
… to experimentally investigate the effect of non-Darcy flow through fracturing sand and irregular shaped materials on the parameters of the Barree and Conway (2004) non-Darcy single-phase flow model. It also investigates the existence of the minimum permeability concept. Several modifications were …
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Lattice Boltzmann simulation of non-Darcy flow in synthetic 2D and 3D porous media models and numerical characterization of tortuosity
Includes bibliographical references (leaves 93-98).
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Numerical Modeling of CO2 Non-Dracy Flow in a Petroleum Reservoir
… is to provide a more accurate description of non-Darcy flow at the near wellbore region. Objectives of the research will be to characterize properties of non-Darcy flow and develop accurate descriptions of carbon dioxide (CO2) flow during injection scenarios and oil flow during production. Other …
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Image-Based Pore-Scale Modeling of Inertial Flow in Porous Media and Propped Fractures
Non-Darcy flow is often observed near wellbores and in hydraulic fractures where relatively high velocities occur. Quantifying additional pressure drop caused by non-Darcy flow and fundamentally understanding the pore-scale inertial flow is important to oil and gas production in hydraulic …
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Experimental and computational analysis of oil field operations
… of unconventional reservoirs to improve fluid flow, and also the surface component of oilfield operations. Regarding the latter, we propose to optimize operations by reducing non-productive time and minimizing infrastructure and operational costs associated with drilling and fracturing. …
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Surface Water and Groundwater Hydraulics, Exchange, and Transport During Simulated Overbank Floods Along a Third-Order Stream in Southwest Virginia
… field evaluations of surface and groundwater flows during overbank floods are rare. We conducted five sets of experimental floods to mimic floodplain reconnection. Experimental floods entailed pumping stream water onto an existing floodplain swale, and were conducted throughout the year to …
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Injection Impairment by Suspended Solids: Well Models, Filtration Parameters, and Models’ Validation with 3-D Injection Experiments
… generates a loss of injectivity as a non-Darcy flow effect. The compounding impacts of high injection fluid velocity with suspended solids are expected to produce more severe injectivity loss than water alone. The problem is complex, and few experiments and models are available in the …
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Gas production forecasting using automatic type curve matching
… as well as the pressure loss owing to non-Darcy flow, make of these solutions quite accurate to model gas wells decline.;Different history productions were matched with these type curves using a computer program, which find the closest production decline to the available time/gas rate. In …
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Performance Evaluation of Wells With Single and Multiple Fractures in Tight Formations
… geology nature, evaluating performance of fluids flow in such a hydraulic fracture system is really a challenge. Numerical modeling and simulation usually requires very fine grid to reduce the truncation error and enhance the simulation accuracy. Sometimes even with fine grid, the associated …
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Gas-condensate flow modelling for shale gas reservoirs.
… pore size in the shale matrix affects the gas flow which deviates from laminar Darcy flow to Knudsen flow resulting in enhanced gas permeability. Furthermore, the phase behaviour of gas-condensate fluids is affected by the high capillary pressure in the matrix causing higher condensate …
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Flow mechanisms and numerical simulation of gas production from shale reservoirs
… study, the deviation against conventional gas flow have been detected in the lab experiments for gas flow through nano membranes. Based on the experimental results, a new apparent permeability expression is proposed with considering viscous flow, Knudsen diffusion, and slip flow. The gas flow …
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A locally conservative variational multiscale method for the simulation of porous media flow with multiscale source terms
Multiscale phenomena are ubiquitous to flow and transport in porous media. They manifest themselves through at least the following three facets: (1) effective parameters in the governing equations are scale dependent; (2) some features of the flow (especially sharp fronts and boundary layers) …
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Railway ballast permeability
… that the rock fill dam studies have known of non-Darcy flow in large aggregates while the railway ballast permeability studies have not. Constant head permeability tests were then conducted using the University of Illinois Constant Head Aggregate Permeameter on clean and fouled ballast providing …
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Design and optimization of micropumps using electrorheological and magnetorheological fluids
… balanced to provide optimal sealing performance. Darcy flow through porous media and Bingham flow in a curved channel with a rectangular cross section have been used to model the MR fluid flow exposed to certain magnetic field intensity. Static and dynamic magnetic sealing performance is …
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Mechanisms and control of water inflow to wells in gas reservoirs with bottom water drive
Water inflow may cease production of gas wells, leaving a significant amount of gas in the reservoir. Conventional technologies of gas well dewatering remove water from inside the wellbore without controlling water at its source. This study addresses mechanisms of water inflow to gas wells and a …
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Numerical studies of flow in porous media using an unstructured approach
Flow and transport in porous media is relevant to many areas of engineering and science including groundwater hydrology and the recovery of oil and gas. Porous materials are characterized by the unique shape and connectivity of the internal void structures which give rise to a large range in …
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Gradient-based dimension reduction for Bayesian inverse problems and simulation-based inference
… inference problems using transport maps or flows that act only on low-dimensional subspaces. We provide a principled way of identifying such subspaces by minimizing an upper bound on the Kullback—Leibler divergence between the current approximation and the target (posterior) distribution. …
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Geomechanically coupled modelling of fluid flow partitioning in fractured porous media.
… with reservoir depletion and affects fluid flow dynamics of the fractured reservoir. Therefore, dynamic characterisation of fractured reservoirs is considered a challenging task, responsible for inefficient exploitation of their reserves. This dissertation focuses on characterising …
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Contributions to asymptotic theory in nonparametric statistics
… encompassed by our general framework are the Darcy flow problem and the steady-state Schrödinger equation. Chapter 4 studies the empirical process arising from a multi-dimensional diffusion process with periodic drift field and diffusivity. In particular, we address the question of proving the …
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