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 “"Mobility control"”.
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Mobility control of chemical EOR fluids using foam in highly fractured reservoirs
Highly fractured and vuggy oil reservoirs represent a challenge for enhanced oil recovery (EOR) methods. The fractured networks provide flow paths several orders of magnitude greater than the rock matrix. Common enhanced oil recovery methods, including gases or low viscosity liquids, are used to …
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Application of Foam for Mobility Control in Enhanced Oil Recovery (EOR) Process
… thesis focuses on the application of foam for mobility control in enhanced oil recovery (EOR) process. The performance of foam and surfactants was evaluated by systematic laboratory study. This includes the screening and evaluation of surfactant formulations for foam EOR process and the …
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Intelligent mobility control of a hybrid electric off-road vehicle with individual wheel control
… can be gained from the use of Individual Wheel Control on a large off-road vehicle. The vehicle concerned is a theoretical, six-wheel drive, off-road Hybrid-Electric Vehicle based on an existing conventional six-wheel-drive Combat Support Vehicle developed by QinetiQ (formerly DERA). The …
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The effects of body fat percentage on inter-vertebral spinal mobility control from hyperextension spinal orthoses
… of suitable quality for inter-vertebral mobility measurements from the lowestpossible dose; and 2) different inter-vertebral mobility measurement methods weretested to identify the one with highest accuracy and reliability (which was theadjusted superimposition method).The findings from …
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Using Covalent and Non-Covalent Chemistry to Control Properties of Single -Walled Carbon Nanotubes
Electrophoretic mobility control is demonstrated via covalent functionalization with 4-hydroxybenzene diazonium and non-covalent functionalization with sodium cholate surfactant. Solution-phase solubility without surfactants can be achieved using high levels of covalent functionalization with aryl …
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Degradable nanocomposite preformed particle gel for chemical enhanced oil recovery applications
… that can be potentially used in conformance control to increase ultimate oil recovery from mature oilfields.</p><p>The first product is a degradable nanocomposite preformed particle gel for enhanced in-depth mobility control. Three different types of degradable nanocomposite preformed …
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Cleaning cooperatively : an analysis of the success and potential of a cooperative business
… options. The argument that ownership and control in the workplace are key features of such a strategy is superficially easy to accept, but becomes more problematic when trade-offs among goals and outcomes are introduced. To better understand the nature of these trade-offs, I compare …
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Development of a framework for scaling surfactant enhanced CO₂ flooding from laboratory scale to field implementation
… is hampered by the existence of an unfavorable mobility ratio that is caused by the large difference in viscosity between the injected fluid (CO2) and the reservoir fluids. This viscosity contrast results in early CO2 breakthrough, viscous fingering, gas channeling, and consequently, the …
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Optimization of chemical enhanced oil recovery methods for naturally fractured carbonate reservoirs
… Cream limestone cores. A decrease in fracture mobility caused by viscous phase trapping in the fracture was identified as the main reason for the high observed oil recoveries. Due to the uncertain properties of the viscous phase trapped in the fracture, polyethylene oxide (PEO) polymer was …
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A novel approach to upscaling reservoir simulation modelling for polymer processes
… recovery efficiency. Key mechanisms such as mobility control, polymer-rock interaction, gravity segregation, viscous crossflow, and reservoir heterogeneity govern fluid displacement and sweep efficiency. While detailed grid resolutions are essential for accurately capturing these processes, …
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Optimum Timing for CO2-EOR After Waterflooding and Soaking Effect on Miscible CO2 Flooding in a Tight Sandstone Formation,
… breakthrough (BT) occur due to an unfavourable mobility contrast between the injected CO2 and the crude oil. The oil recovery is limited after CO2 BT, which is attributed to the gas channeling problem. In continuous CO2 tertiary flooding, the previously injected water helps to control the …
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An Electromechanical Synchronization of Driving Simulator and Adaptive Driving Aide for Training Persons with Disabilities
… none of them have joystick-enabled training that controls both steering, gas and break pedal. This necessitates the design of a method and a system which helps a person with disabilities learn how to operate a joystick-enabled vehicle, by using a combination of an advanced vehicle interface …
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A Multiscale Study of Foam: The Phase Behavior, Transport, and Rheology of Foam in Porous Media
… media for subsurface applications such as gas mobility control, aquifer remediation, CO2 sequestration, water production control etc. In enhanced oil recovery (EOR), gas flooding has superior crude oil displacement efficiency where the gas sweeps. However, the overall oil recovery is often not …
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Cognitive-motor interaction in health and disability
… environment and task (IET) centered motor control framework. This work is of both theoretical and clinical importance. The primary aim of this analysis was to present an in depth theoretical examination of CMI that to date has not been explicitly performed in any population. By carrying out …
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British Citizenship and Immigration Policy, 1945 - 1962.
… and as part of a longstanding framework of controls on the entry and settlement of non-white British subjects from the colonies.