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 37 for “"seismic survey"”.
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ADVANCED RISK MANAGEMENT OF AN ARCTIC MARINE SEISMIC SURVEY OPERATION
… addressing the high risks in Arctic Marine Seismic Survey Operations (AMSSO), and the lack of transparent decision-making in Arctic shipping risk management globally. The literature review carried out herein reveals that the AMSSO and Arctic navigation involve significant risks caused by …
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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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Elastic properties of salt: laboratory measurements, well-log analysis, and a seismic survey over the Hockley Salt Mine, Texas
… use lab measurements, well-log data, and surface seismic to determine the properties of salt crystal and rocks. In the lab, we have undertaken ultrasonic measurements on salt samples from various locations. The pure halite crystals from the Goderich salt mine, Canada, demonstrate shear-wave …
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Application of disturbance theory to assess impacts associated with a three-dimensional seismic survey in a freshwater marsh in southwest Louisiana
… 1990's application of three-dimensional (3-D) seismic technology used in the oil and gas recovery business challenged landowners, government regulators, and industry to develop ways to recover these resources without damaging surface features. I developed a conservative estimate that an area …
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Seismic and Well Log Attribute Analysis of the Jurassic Entrada/Curtis Interval Within the North Hill Creek 3D Seismic Survey, Uinta Basin, Utah, A Case History
3D seismic attribute analysis of the Jurassic Entrada/Curtis interval within the North Hill Creek (NHC) survey has been useful in delineating reservoir quality eolian-influenced dune complexes. Amplitude, average reflection strength and spectral decomposition appear to be most useful in locating …
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Time-lapse Acoustic Imaging of Oceanic Fronts and Eddies
Seismic reflection surveying is used to generate acoustic images of the water column. This technique employs conventional multi-channel equipment which is used to image the solid Earth. In the water column, acoustic impedance contrasts are produced by variations in temperature and, to some extent, …
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Stress prediction, fracture detection, and multiple attribute analysis of seismic attributes in a Barnett Shale gas reservoir, Fort Worth Basin, Texas
… provided RCP with electric well logs, 3D P-wave seismic, microseismic, and engineering data from the area of the Barnett Merge 1 seismic survey under the terms of a confidentiality agreement. In compliance with that agreement, certain information, such as the names and locations of wells, seismic …
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Interpretation and Fracture Characterization of Early-Cretaceous Buda Limestone Formation Using Post-Stack 3D Seismic Data in Zavala County, Texas
… these zones using well log and post stack 3D seismic data typically available to medium or small exploration companies. This project provides a workflow based on well log analysis tied to seismic acoustic impedance (AI) inversion to locate areas of probable natural fractures. Acoustic …
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Time-Lapse Acoustic Imaging of the Oceanic Energy Cascade
Active-source marine seismic reflection records have been used to construct acoustic images of oceanic thermohaline structure. In the water column, acoustic boundaries are produced by variations in temperature and, to a lesser extent, salinity. Acoustic waves generated by an array of airguns …
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Seismic Tomography for the Integrity Assessment of Earthen Dams and Levees.
… examines the use of a non-invasive geophysical seismic method to provide additional information where the usual visual inspection is insufficient and the comboring investigation is not an option. Even though seismic techniques provide valuable information of the subsurface strata, the …
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Investigating the Timing of initial Louann Salt Flow and Its Relationship with the Gilbertown Fault Zone, Southwest Alabama
… of Louann Salt through the use of a 3D seismic survey and well logs. By mapping Mesozoic formations and the peripheral fault system, lateral changes in formation thickness were used to generate fault expansion indices (FEI) and formation thickness charts, whereas well logs were utilized …
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Microphone suppression of air-noise on geophones
Air-noise in seismic records creates a loss in signal quality, reducing seismic image clarity. A microphone may be used to estimate and remove air-noise in seismic records. This thesis covers the characterization of air-noise on a prototype 4-Component geophone (3-C geophone plus microphone), as …
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Structure of the Chesapeake Bay Impact Crater from Wide-Angle Seismic Waveform Tomography
… sediments. In 2004, the U.S. Geological Survey conducted a seismic survey with the goals of constraining crater structure and in support of the drilling of a borehole into the deepest part of the crater. Travel-time and waveform inversion were applied to the data to produce a …
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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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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
… and/or transport rates. At the second site, a seismic survey of the Indus River subaqueous delta describes the morphology and Holocene sedimentation of the Pakistani shelf and identified suitable coring locations for paleoclimate reconstructions. The δ13Cwax record shows a stable arid climate …
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Faults and fractures in the Niobrara Formation of Wattenberg field, Colorado
… Field, Colorado. For the purposes of this study, seismic-scale faults are interpreted as horizons with displacements. Seismic-scale fractures are interpreted as linear amplitude discontinuities. Borehole image log scale faults show displacement. Borehole image log scale fractures do not show …
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Physical Modeling and Analysis of Seismic Data from a Simulated Fractured Medium
This thesis studies the physical seismic modeling of a simulated fractured medium to examine variations of seismic re ection amplitudes with source-receiver o set and azimuth (AVAZ). The intent is to extract information about the fracture orientation and magnitude of the anisotropy of a naturally …
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Aridification of the Indian subcontinent during the Holocene : implications for landscape evolution, sedimentation, carbon cycle, and human civilizations
… and/or transport rates. At the second site, a seismic survey of the Indus River subaqueous delta describes the morphology and Holocene sedimentation of the Pakistani shelf and identified suitable coring locations for paleoclimate reconstructions. The ([delta]¹³Cwax record shows a stable arid …
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Continental Arc Processes in British Columbia and Earthquake Processes in Virginia: Insights from Seismic Imaging
… from a refraction and wide-angle reflection seismic survey across the Coast Plutonic Complex and Stikine terrane of British Columbia were inverted to derive two dimensional P and S-wave seismic velocity models of the crust and uppermost mantle. A felsic upper crust and a felsic to …
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Seismic Data Processing and Interpretation via Deep Learning
… (DL) algorithms are growing in popularity in seismic data processing and interpretation due to their efficiency and the ability to deal with non-linear problems. My dissertation focuses on developing new algorithms and workflows for seismic data processing and interpretation by using DL …
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