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 272 for “"time lapse"”.
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Time-lapse seismic AVAz in the Stocker Field
Organic rich Murdock reservoirs require hydraulic stimulation to be economically productive. Zones of high fracture density are desired due to the increase in permeability they would have. Thus, fracture characterization is an essential part of production planning in unconventional reservoirs. …
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Time-Lapse Polymerizations Triggered by pH clock Reactions
The theme of this work is time-lapse polymerizations triggered by pH clock reactions. The first chapter is the introduction and gives a long overview of the different chemistries studied here. The second chapter focuses on the bromate-sulfite clock reaction. Based on some simplified and accepted …
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Pressure estimation using time-lapse seismic in compacting reservoirs
… attributes in compacting reservoirs. The time-lapse seismic signal in these types of reservoirs results from the combination of pressure depletion, rock compaction and stress redistribution within the reservoir and throughout the surrounding rocks. Simulations using iterative coupling are …
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Time-Lapse Acoustic Imaging of the Oceanic Energy Cascade
… and $\sim 1$~day. The survey thus provides time-lapse sampling of local thermohaline structure within an area of $\sim 150$~km$^2$. Processed acoustic images are dominated by a prominent band of bright reflections at depth. Calibration using nearby hydrographic measurements shows that this …
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Time-lapse Acoustic Imaging of Oceanic Fronts and Eddies
… of \textit{O}(10)~km~day$^{-1}$, this survey is time-lapse in nature. Processed images reveal a band of dipping reflections that extend to depths of $\sim$2000~m. These reflections represent the frontal interface between the Brazil and Falkland currents. Physical oceanographic properties are …
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MONITORING INFILTRATION FROM NATURAL STORMS USING TIME-LAPSE ELECTRICAL RESISTIVITY TOMOGRAPHY
Time-lapse electrical resistivity tomography (TL-ERT) enables an accurate characterization of the heterogeneity of flow through the unsaturated zone especially when compared to point measurements taken within the same survey area. The most powerful tool for understanding the unsaturated zone is a …
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Inspection of Earthen Embankment Dams Using Time Lapse Electrical Resistivity Tomography
According to the National Inventory of Dams (NID), the number of dams across the United States is approximately 85,000. Many of these dams are more than 50 years old and need vast attention to ensure their safety. It is difficult to obtain a full assessment of the dam just by visual inspections …
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Computational image analysis of subcellular dynamics in time-lapse fluorescence microscopy
… tracking algorithms was adapted for analyzing time-lapse data of cells with fluorescently labeled protein. Performance metrics were devised and algorithm parameters were matched to hand-created ground-truth data. The performance of these algorithms in this domain was compared. Finally, the …
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Full wavefield inversion methods for monitoring time-lapse subsurface velocity changes
… measurements of seismic velocity changes from time-lapse seismic experiments provide dynamic information about the subsurface that improves the understanding of the geology and reservoir properties. In this thesis, we propose to achieve the quantitative analysis using full wavefield inversion …
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Time-Lapse Depletion Modeling Sensitivity Study: Gas-Filled Gulf of Mexico Reservoir
Time-lapse seismic allows oil/gas reservoir monitoring during production, highlighting compaction and water movement. Time-lapse modeling, using a stress-dependent rock physics model, helps determine the need and frequency of expensive repeat seismic acquisition. We simulate a Gulf of Mexico gas …
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Analysis of the repeatability of time-lapse 3D VSP multicomponent surveys, Delhi field
… In order to monitor the CO2 sweep efficiency, time-lapse 3D seismic data have been acquired in this area. Time-lapse studies are increasingly used to evaluate changes in the seismic response induced by the production of hydrocarbons or the injection of water, CO2 or steam into a reservoir. A 4D …
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Automated Analysis of Astrocyte Activities from Large-scale Time-lapse Microscopic Imaging Data
… on a large population of cells over a long-time period in vivo. Existing tools cannot fully characterize these activities, both within single cells and at the population-level, because of the insufficiency of current region-of-interest-based approaches to describe the activity that is often …
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Machine Learning for Lifespan Inference from Time-Lapse Microfluidic Images of Dividing Yeast Cells
… is to efficiently convert large volumes of time-lapse images into quantitative measurements of yeast cell lifespan measurements. To address these issues, we developed several deep learning methods to analyze a large number of images collected from microfluidic experiments. First, we compared …
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Time-Lapse Variations of Multi-Component Electrical Resistivity Measurements Acquired in High-Angle Wells
… in LWD and open-hole environments. At the same time, field experience indicates that invasion and time of logging can have a significant effect on multi-component induction measurements acquired in high-angle wells, specifically in the presence of highly permeable formations and large contrasts …
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Time-lapse p-wave seismic monitoring of the CO₂ flood at Weyburn field, Saskatchewan
Includes bibliographical references (pages 142-143).
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Time-lapse Passive Seismic Velocity Tomography of Longwall Coal Mines: A Comparison of Methods
Time-lapse passive seismic velocity tomography was conducted utilizing data from three underground longwall coal mines to produce a better understanding of the processes that lead to ground failure in mines, especially large, violent failures, such as bumps. Two of the datasets, US Western I and US …
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