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 191 for “"low permeability"”.
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Research about low permeability measurement
… from shale is challenging because of the low porosity and permeability. It is imperative to investigate permeability of the shale formations in order to better understand the performance of wells that are producing hydrocarbons from shale. Permeability is also one of key parameters in …
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Management of contaminants in low permeability media
To view the abstract, please see the full text of the document.
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Retardation and reaction in low permeability layers in groundwater plumes
To view the abstract, please see the full text of the document.
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CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs
… depend on the pore size. Considering that permeability is small in tight rocks and shales, we expect that mass transfer within heterogeneous pore size porous media to be diffusion-dominated. Our results imply that there can be a selective matrix-fracture component mass transfer during both …
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Low Interfacial Tension Foam Miscible Ethane Oil Recovery in Low Permeability Harsh Environments
This work presents a laboratory investigation of low interfacial tension miscible ethane foam enhanced oil recovery in low permeability, heterogeneous, harsh environments (<15md, 136,000ppm total dissolved solids with divalent ions, 74°C). Minimum miscibility pressure displacement tests were …
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Poroelastic Calibration for Hydromechanically Coupled Numerical Discontinuum Models with Application in Low Permeability Hard Rock
… the poroelastic response of the rock and flow through the intact rock can be incorporated into numerical models. This thesis provides a process to calibrate grain based poroelastic discontinuum numerical models which simulate the elastic response and fluid flow through low permeability hard …
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The Application of Single porosity Model to Predict the Performance of the Low Permeability Naturally Fractured Formations
… due to the tight reservoir rock with nano-darcy permeability. New technology in the form of horizontal drilling and hydraulic fracturing (fracturing through the use of high pressure liquids) has overcome the flow capacity problem of shale to achieve economic production. The low permeability shale …
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Experimental analysis of natural gas transport: using nanoporous ceramic cores as mimetic model for low permeability reservoirs.
… models for studying natural gas transport in low permeability reservoirs. Low permeability reservoirs, such as tight sands, coalbed methane and shale gas formations, present significant challenges for natural gas extraction due to their complex pore structures and limited flow characteristics. …
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Membrane properties of intact rock cores of Burlington Limestone, Jefferson Dolomite, Darrington Phyllite, and low permeability concrete
… Ridge Jefferson Dolomite, Darrington Phyllite, Lower Burlington Limestone, and low permeability concrete to determine if tight lithologies can function as membranes"--Abstract, page iv.
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Computer Aided Design and Fabrication of Magnetic Composite Multilayer Inductors
… found that selectively introducing regions of low permeability material increased both the inductance and the current carrying capacity compared to thick film inductors made with single material magnetic cores. Permeabilities of the composite cores ranged from 1 to 220. The frequency for the …
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Geomechanical aspects of fracture growth in a poroelastic, chemically reactive environment
… growths are driven by fluid loading. The fluid flow properties of the host rock have a primary, but hitherto little appreciated control on the NHF propagation rates. This study focuses on investigating the impacts of host rock fluid flow on the propagation and pattern development of multiple NHF …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… study aimed at alleviating back diffusion from low permeability porous media observed at numerous field studies. Experiments were conducted in a two-dimensional sandbox with alternate vertical layers of coarse sand and silt flooded with TCE at aqueous solubility. Electrokinetics (EK) was used to …
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Compressibility and permeability of natural soft clays and surcharging to reduce settlements
Soft clays, often with high compressibility and low permeability, are frequently encountered in important engineering projects. This investigation has been concerned with consolidation characteristics of natural soft clays.
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Evaluation of purging methods when sampling for volatile organic compounds from low-yield monitoring Wells
… acted as a "borehole" for the monitoring well. Low-permeability soil in a 25.4 cm diameter stainless screen surrounded the borehole and simulated an aquitard or low-permeability aquifer. This apparatus was placed in a tank filled with chlorobenzene and 1,1,1-Tricholorethane-spiked water. The …
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The mechanisms of mold filling and casting defect formation in the lost foam casting process
… led to faster fill velocity when using a high permeability coating, although the effect was smaller if a low permeability coating was used. Thermal analysis indicated that the metal-foam interface gap was narrow when filling a high permeability coating pattern, while the gap was much wider in a …
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Developing Constitutive Laws for the Endothelial Glycocalyx Layer
… important interface between the endothelium and flowing blood and as such is believed to play a number of important roles including transducing mechanical signals from flowing blood (mechanotransduction) and regulating vessel permeability. The use of mathematical modelling is motivated by the fact …
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Distribution of ammonium nitrate as nitrogen containing nutrient for in-situ biodegradation by means of electrokinetics
… the supply of nutrients usually come from the low permeability of soils. The feasibility of the application of electrokinetic processes, and, more specifically, the induced electroosmotic flow, for achievement of uniform distribution of nutrients for in-situ bioremediation in a natural clayey …
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Evaluation of the performance of different polymer gel systems as an in-depth gel treatment using numerical simulation
… are usually hindered due to the presence of high-permeability streaks and natural fractures networks. Oil production could be more lowered if there is a crossflow from the high- to the low-permeability layers and high mobility ratio. These problems are called conformance problems and the treatment …
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HYPORHEIC FLOW, RESIDENCE TIMES AND NITROGEN REACTIONS IN A RIFFLE-POOL SEQUENCE, TRUCKEE RIVER, NV.
… matter that reduces riverbed porosity and permeability and promotes microbial activity that stimulates nitrogen transformations. In the hyporheic zone, physical and biogeochemical processes controlling nitrification and denitrification processes are directly linked. Thus, this dissertation …
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The Fluid Mechanics of Hydraulic Fracturing (Oil Recovery)
… is the stimulation of oil wells of relatively low permeability. This is accomplished by pumping high pressure fluid down the wellbore in an effort to fracture the surrounding rock, and thereby, increase the effective permeability of the well. The principal goal of the present study is to …
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