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 15 of 15 for “"Discrete Fracture Network"”.
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Simulation of stress dependent fluid flow in naturally fractured reservoirs
Naturally fractured reservoirs represent significant portion of the world's oil and gas reserves. In most of the reservoirs, fractures are important contributors to fluid flow. Thus, modeling and simulation of discrete fracture network is essential to assess responses of the reservoirs under …
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Data-Driven Deep Learning Methods for Physically-Based Simulations
… flow analysis problems modeled through Discrete Fracture Networks, training Deep Learning models as reduced models for Uncertainty Quantification. In particular, we look for trained Neural Networks able to predict the outflowing fluxes of a Discrete Fracture Network model. These Neural …
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Novel Insights into the Hydrogeochemical Evolution of Groundwater within the Transboundary Milk River Aquifer
The Milk River Aquifer (MRA) is a transboundary fractured sandstone aquifer extending across southern Alberta, Canada, and northern Montana, USA. Although studied for more than six decades, the processes controlling groundwater flow, apparent average groundwater ages, chloride distribution, and …
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Non-destructive evaluation of laboratory scale hydraulic fracturing using acoustic emission
… to develop techniques to characterize hydraulic fractures and fracturing processes using acoustic emission monitoring based on laboratory scale hydraulic fracturing experiments. Individual microcrack AE source characterization is performed to understand the failure mechanisms associated with …
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Interplay of porous media and fracture stimulation in sedimentary enhanced geothermal systems : Red River Formation, Williston Basin, North Dakota
Fracture stimulated enhanced geothermal systems (EGS) can be installed in both crystalline rocks and sedimentary basins. The Red River Formation (Ordovician), which lies between 3.6 and 4.2 km depth in the Williston Basin, is a viable site for installation of sedimentary EGS (SEGS). SEGS is …
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Numerical study of downhole heat exchanger concept in geothermal energy extraction from saturated and fractured reservoirs
… by adding thermal energy transport equations and fracture representation (discrete fracture network). Several verification and validation tests are carried out. Parametric studies are presented for various configurations of DHE and thermodynamic analysis is carried out for the binary power plant …
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Numerical Modeling Methodology for Weak Rock Masses in Nevada gold mines
Many Nevada gold deposits are found in highly fractured and faulted host rock with RMR ranging from 10 to 50. Various ground control design issues in weak rock masses are faced by most underground mines operating in Nevada. Numerical models complement field observations, instrumentation techniques, …
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Processes of Progressive Deformation with Applications to Jointing, Faulting and Fluid Flow
The study of progressive deformation of fracture mechanical processes in earth and planetary sciences is applicable to all fracturing modes (opening-, sliding-, tearing-, and closing modes) and provides insight into evolution and behavior of fracturing on all scales. Hence, studying such processes …
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Numerical and analytical modeling of heat transfer between fluid and fractured rocks
Modeling of heat transfer between fluid and fractured rocks is of particular importance for energy extraction analysis in EGS, and therefore represents a critical component of EGS design and performance evaluation. In conventional fracture dominated geothermal systems with reinjection, this …
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Stretched Exponential Decline Model as a Probabilistic and Deterministic Tool for Production Forecasting and Reserve Estimation in Oil and Gas Shales
… understand the interaction of the different fracture properties on reservoir response and production decline curve behavior, a series of Discrete Fracture Network (DFN) simulations were performed. Results show that at least a 3-layer model is required to reproduce the decline behavior as …
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Use of hydraulic tests to identify conceptual models of heterogeneity for fractured rock aquifers
… sites throughout the world are located in fractured rock formations. Responsible management of these resources and sites requires appropriate field characterization studies and modeling techniques to assess the impact of management alternatives. Characterization and modeling of aquifers is …
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Simulation and optimisation of hydraulic fracturing and flowback in unconventional reservoirs: A case study in the Cooper Basin, South Australia
… predicted. 3. Because of pre-existing natural fractures and the complex stress regime, there is usually high Near-Wellbore Pressure Loss (NWBPL) and pressure dependent leak-off during hydraulic fracturing. In this thesis, tortuosity around the wellbore was found as the main reason and linked to …
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The hydrogeological investigation of worked coal measures rocks and its application to the modelling of groundwater flows
… features, beneficial to fluid movements, to the fracture dominated flowpaths within unmined strata, will determine the 'weighting' that can be applied to the n influence of each mechanism for flow. Neither Darcian or Discrete Fracture Network modelling approaches, permit the level of interaction …
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Integrating Laser Scanning with Discrete Element Modeling for Improving Safety in Underground Stone Mines
… has been used for mapping and characterizing fractures present in a rock mass. TLS is a technology that allows to generate a three-dimensional multimillion point cloud of a scanned area. In addition to this, the advances in computing power throughout the past years, have allowed numerical …