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Showing 1 to 18 of 18 for “"fracture flow"”.
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Fracture flow as influenced by geologic features in the Aberjona Valley, Massachusetts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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Evaluation of Fracture Flow at the Coles Hill Uranium Deposit in Pittsylvania County, VA using Electrical Resistivity, Bore Hole Logging, Pumping Tests, and Age Dating Methods
… basin to the east. Groundwater at the site flows through a complex interconnected network of fractures controlled by the geology and structural history of the site. In this study groundwater is characterized in a small study area just south of the main deposit. Methods used in this …
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Geologic stochastic modeling of rock fracture systems related to crustal faults
… of the MIT three-dimensional geologic stochastic fracture model were extended so that fracture systems related to crustal faulting can be simulated. As presented here, the model comprises four stochastic processes: 1) a homogeneous, anisotropic Poisson process to model the orientation of the …
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Geomechanically coupled modelling of fluid flow partitioning in fractured porous media.
Naturally fractured reservoirs are characterised with complex hydro-mechanical dynamics. In these reservoirs, hydrocarbons can be stored and produced from the rock matrix, the fracture network, or both. Normally the fracture network is depleted much faster than the matrix blocks due to its …
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Microbial transport in volcanic tuff Rainier Mesa, Nevada test site
Water flowing along fractures may affect the mobilization of microorganisms in volcanic tuff and impose conditions that are different from those in the rock matrix away from water flow paths. To address the potential for bacterial transport with water in deep fractured tuffs, flow water and six …
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Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems
… hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that it is based on statistical input representing fracture patterns in the field in form of the fracture intensity P₃₂ (fracture area per volume) and the best estimate fracture size E[A]. …
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An Unsteady State Tracer Dilution Method for Characterizing Water Contributing Fractures in Crystalline Bedrock Wells
<p>Evaluating contaminants impacting wells in fractured crystalline bedrock requires knowledge of the individual fractures that contribute water to the wells. This typically involves using a sequence of methods including downhole geophysics, flow meters, and straddle packers. These methods are …
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A forward thinking expert system in well test analysis
… the initial data (time prior to test, flowrates, etc.) and selecting the type of analysis (multiphase, multirate, fracture, etc.), to evaluating the correct data for analysis or matching the best type curve.</p> <p>This paper describes an application of artificial intelligence through a …
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Further development and application of GEOFRAC flow to a geothermal reservoir
… hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that is based on statistical input representing fracture patterns in the field in form of the fracture intensity P₃₂ (fracture area per volume) and the best estimate fracture size E(A). Recent …
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Modeling karst aquifer response to rainfall
… to generate a linear regression relation between fracture conductivity and potential gradient in a karst aquifer system. Rainfall excess in the form of potential energy from sinkhole sub-basins is input to element nodes and routed through a one-dimensional finite-element mesh to the karst spring …
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The role of accessory minerals in inhibiting bentonite erosion in the geological disposal of higher activity radioactive waste
… loss assessments. As indeed is the presence of fracture aperture variability on the extrusion / erosion process, as almost exclusively, research carried out to date has been in uniform aperture fracture flow cells. Four month duration erosion experiments were undertaken, designed to mimic …
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Application of the Variational Fracture Model to Hydraulic Fracturing in Poroelastic Media
… the use of simple numerical models to describe fracture geometry and propagation. Field tests provide evidence of interaction and merging of multiple fractures, complex fracture geometry and propagation paths. These complicated behaviors suggest that the simple models are incapable of serving as …
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Evaluating Preferential Recharge in Blue Ridge Aquifer Systems Using Saline Tracers
… structure on groundwater recharge at the Fractured Rock Research Site in Floyd County, Virginia. Tracer migration was monitored through soil, saprolite, and fractured crystalline bedrock for a period of 3 months with chemical, physical, and geophysical techniques. Potassium chloride (KCl) …
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Monitoring water and pollutant leaching at an industrial site using geophysics and a vadose zone monitoring system.
… require a detailed understanding of water flow dynamics and contaminant distribution in the subsurface. However, the retrieval of such information across the vadose zone is challenging, as most field technologies have limited accessibility beyond the first meters of subsoil and industrial …
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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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Thermorheology and processing of polyethylene blends : macromolecular structure effects
… for the onset of sharkskin and gross melt fracture are slightly delayed with the addition of LDPE into LLDPE. Furthermore, the amplitude of the oscillations in the stick-slip flow regime, known as oscillating melt fracture, were found to scale with the weight fraction of LDPE. Amounts as …
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Analysis and modeling of coupled thermo-hydro-mechanical phenomena in 3D fractured media = Análisis y modelización de fenómenos acoplados termo-hidro-mecánicos en medio fracturado
… coupled Thermo-Hydro-Mechanical phenomena in a fractured porous rock, this time at the scale of a hundred meters, based on the data of the “In-Situ Test” of the FEBEX project conducted at the Grimsel Test Site in the Swiss Alps. As a first step, a reconstruction of the 3D fracture network is …
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An Engineering Analysis Method for Deep Geothermal Energy
… each other well. The effect of a natural fault/fracture that exists in the aquifer on the performance of a doublet system, namely the temperature distribution and extracted temperature, is evaluated. By comparing the line model with the domain model, it is found that the line model is valid and …