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 13 of 13 for “"single fracture"”.
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Physical and numerical experiments of flow and transport in heterogeneous fractural media : single fracture flow at high Reynolds numbers, and reactive particle transport
… thesis is focusing on an experimental study of single phase flow processes in a single granite fracture. In order to obtain the aperture field, two different measurement methods were developed and evaluated. The effect of heterogeneities of the aperture field was shown by a visualization of …
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Effects of subsurface fracture interactions on surface deformation
… deformation resulting from the opening of a single fracture in a layered elastic half-space resembles the observed deformation at the InSalah site, it seems unlikely that only a single fracture is involved. This raises the question of how interaction among multiple fractures affects surface …
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The simulation of single phase, compressible fluid flow in fractured petroleum reservoirs using finite elements
… flow through a porous and permeable medium, a single fracture, a network of fractures, and with the coupling of the fracture network and blocks of matrix material.
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Performance Evaluation of Wells With Single and Multiple Fractures in Tight Formations
… resources economically feasible. Due to complex fracture network and 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 …
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The effect of biostimulation on geochemical and microbiological conditions in an isolated dolostone fracture
… nutrient addition on microbial populations in a fractured rock environment. The ultimate goal of this research is to induce bioclogging in rock fractures as a method of in situ containment and remediation of contaminated groundwater. This trial focused on biostimulation of indigenous bacteria in …
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Zur Strömungssimulation in Einzelklüften: Gegenüberstellung von numerischen Methoden und Experiment
… in the field of flow and transport processes in fractured rock is of high relevance due to the frequent occurrence of fractures in geological formations. For this reason, fracture flow problems are addressed in many fields of engineering tasks. Based on results of numerical simulations and …
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Sensitivity analysis of fracture scattering
… numerically calculate the seismic response of a single finite fracture in a homogeneous media. In our experiments, we use a point explosive source and ignore the free surface effect, so the fracture scattering wave field contains two parts: P-to-P scattering and P-to-S scattering. We vary the …
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Correlstion between the volume of slurry and the volume of fracture in Barnett Shale
Microseismic fracture mapping has revealed that large fracture networks can be generated in many shale reservoirs and create multiple of plan complex structure. The ultra-low permeability in Barnett shale requires hydraulic fracturing to generate wellbore contact with the reservoir in order to …
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Characterization of a hydraulically induced bedrock fracture
… This process extends and widens existing bedrock fractures, allowing groundwater storage to increase. Researchers have studied the behavior of fractured-rock aquifers for decades, but little has been published on the hydraulic and mechanical properties of hydraulically enhanced fractures. In this …
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Fluid-Driven Fractures in Elastic Hydrogels: Propagation and Coalescence
… a novel experimental exploration of fluid-driven fractures in a brittle hydrogel matrix. Fluid-driven fracturing is a procedure by which a fracture is initiated and propagates due to pressure applied by a fluid introduced inside the fracture. We describe how to construct the experimental setup …
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Computational fluid dynamics modelling of fluid flow inside fractured reservoirs.
Fractured media exist in most layers of the earth's crust, often dominating bulk properties of subsurface geological formations. Therefore, fractured media are involved in many key engineering sectors that impact humans living on Earth. Fractured formations consist of two distinct media sharing the …
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Characterization of Fractures Subjected to Normal and Shear Stress
… a series of laboratory experiments to determine fracture specific stiffness, for a fracture subjected to shear and normal stress, are presented and analyzed. The experimental work focuses on the determination of relations between normal and shear fracture specific stiffness and between spatial …
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Trace element geochemistry of oceanic peridotites and silicate melt inclusions : implications for mantle melting and ocean ridge magmagenesis
… state mantle melting at the Atlantis II Fracture Zone cutting the very slow spreading Southwest Indian Ridge. Trace element compositions of peridotite clinopyroxenes from fracture zones along the American-Antarctic and Southwest Indian Ridges vary as a function of proximity to hotspots. …