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 42 for “"seismic surveys"”.
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Avalanching on dunes and its effects: Size statistics, stratification, & seismic surveys
… hydrologists and soil scientists determines the seismic velocities of concern to exploration geophysicists. In this dissertation, I describe four projects conducted for the degree of Doctor of Philosophy, using a combination of laboratory experimentation, fieldwork, numerical simulation, and …
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An Investigation of 3D Seismic Deep Basement Events in Osage County, Oklahoma
<p>Deep basement events seen in 3D seismic surveys located in Osage County, Oklahoma can be observed and may have affect overlying sedimentary formations. The 3D surveys used in this study are on the Chautauqua platform about fifty miles northwest of Tulsa, Oklahoma. Stratigraphy of the work area …
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The Challenges and Solutions of Green Seismic Survey: Imaging Deep Seafloor Structures with Cruise TN-373 Reflection Data
Seismic surveys in the past can be viewed as a trade-off between data quality and survey cost. As technology advances, the gap between these two demands has lessened. Nowadays, a new factor is emerging as more regulations are aimed at curbing the environmental impact of seismic surveys. I define …
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Analysis and pattern mapping of organic interfaces by means of seismic geophysical technologies to investigate archaeological palaeolandscapes beneath the Southern North Sea
… peat in submarine environments by interpreting seismic surveys of the sub-sea floor and analysing reflective signals for distinctive organic responses. By means of sedimental analysis and ground observation, the research sets out to differentiate between organic signals, to allow for the …
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EVALUATION OF BEDROCK DEPTH AND SOIL INFILTRATION ALONG PENNYPACK CREEK USING ELECTRICAL RESISTIVITY TOMOGRAPHY AND MOISTURE LOGGERS
… ERT was also used to validate or dispute recent seismic interpretations. Four study sites adjacent to Pennypack Creek were selected based on variations in underlying geology: Triassic basin sedimentary rock (Lukens), Paleozoic mafic gneiss (Meadow), Piedmont mica schist (Pine Road), and coastal …
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Analysis of seismic reflection data over the Sanford Triassic Basin, Chatham and Lee Counties, North Carolina
Approximately 9.5 km of seismic reflection data over the western margin of the Sanford Triassic Basin in North Carolina were acquired by Chevron, Inc. in 1972. These data enabled a comparison of the relative effectiveness of dynamite and vibroseis sources to be made. A comparison of 3-fold and …
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A Regional Study Of Wilcox Reservoirs In The Deepwater Northern Gulf Of Mexico
… sequence stratigraphy, and interpretation of 3D seismic surveys, with generation of a cross section and structure, amplitude, and isopach maps, as well as, reserve calculations. These results are then compared to the literature on jack and St. Malo fields to provide an evaluation of regional …
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Machine Learning and Bayesian Statistics for Seismic Compressive Sensing
Seismic surveys involve an artificial source of waves and a grid of receivers at the surface. Often, receivers could be missing either because they malfunctioned or could not be placed in certain locations. It could also be the fact that a local source of noise renders a receiver’s output as …
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Mitigating the Problem of Non-uniqueness in Fluid-flow Modeling
… Additional data sets from self-potential or seismic surveys have complemented the fluid flow data in different joint inversion methods. sing self-potential data allows the detection of fractures with higher confidence. The seismic data was used in a cross-gradient joint inversion scheme to …
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Reservoir characterization using seismic inversion data
… be inferred from analogs and geologic concepts, seismic surveys, and well data. Stochastically inverted seismic data are uninformative about meter-scale features, but aid downscaling by constraining coarse-scale interval properties such as total thickness and average porosity. Well data reveal …
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Computational seismic interpretation using attention models, texture dissimilarity, and learning
… and transportation. Oil and gas explorers use seismic surveys, both onshore and offshore, to produce detailed images of the various rock types, layers, and their locations beneath the Earth's subsurface. The acquired data undergo a series of processing steps, which require powerful computing …
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Fluid flow through connected sub-seismic features in mudstone
… of 10m i.e. at the limit of typical industry seismic surveys. Field data show evidence for two distinct flow episodes; carbonate-filled veins and green alteration halos. Flow utilised a subgroup of both the fractures and the more permeable sandstone bands but this flow network varied between …
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New Approaches In Hydrogeophysical Model Predictions: Case Studies From theP Reactor Area, Savannah River Site, South Carolina
… borehole ground penetrating radar (GPR), P-wave seismic reflection, and electrical resistivity tomography (ERT) data collected at a contaminant site located in the vicinity of the P Reactor at Savannah River Site, South Carolina. These near-surface geophysical methods provide information at …
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Wind Induced Ground Motion
Wind noise is a problem in seismic surveys and can mask the seismic signals at low frequency. Development of practical solutions to this problem must be based on a good understanding of the mechanism of the wind-ground coupling. This thesis investigates the driving pressure and shear stress …
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Analysis of the repeatability of time-lapse 3D VSP multicomponent surveys, Delhi field
… 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 seismic …
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Offshore El Salvador: the first interpretation of a unique 2-D seismic dataset and implications for a working petroleum system in a forearc basin setting
… to Costa Rica. Interpretation of 3,700 kms of 2D seismic data reveal the presence of a deep depositional basin bounded on the northeast by the Central American Volcanic Arc and on the southwest by a basement ridge that forms a prospective anticlinal closure approximately 100 km offshore. The basin …
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A multidisciplinary approach to reservoir characterization of the coastal Entrada erg-margin gas play, Utah
… facies analysis, 2D high-resolution shallow seismic surveys, porosity and permeability analysis, and sedimentary petrography. Logs from the North Hill Creek/Flat Rock gas field were analyzed and correlated to the outcrop study. Eolian dune facies, along with an upper ripple laminated facies …
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Analysis of Paleokarst Sinkholes in the Arkoma Basin using 3-D Seismic
… Worth basin, this study utilizes multiple 3-D seismic surveys and subsurface well control to map paleokarsts within the Viola Limestone in the Arkoma Basin. Calculated seismic attribute volumes used to identify paleokarst sinkholes within the Viola Group include coherency and curvature …
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