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 16 of 16 for “"microseismic data"”.
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PORTABLE WIDEBAND MICROSEISMIC DATA ACQUISITION SYSTEM
Microseismic monitoring has gained importance ever since a correlation was established between earthquakes and intensive mining operations at various mine sites across the world. A microseismic network is in place at the Cory, Saskatchewan, mine site to record vibrations from minor tremors and to …
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Geomechanical Reservoir Model Calibration and Uncertainty Assessment from Microseismic Data
… reservoir characterization (SSBRC) to integrate microseismic events to infer reservoir property distributions. To model the geothermal reservoir stimulation, a fully coupled thermo-poroelastic finite element method (FEM) model has been developed to handle the coupled process of heat transport, …
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A new signal processing method for acoustic emission/microseismic data analysis
"The acoustic emission/microseismic technique (AE/MS) has emerged as one of the most important techniques in recent decades and has found wide applications in different fields. Extraction of seismic event with precise timing is the first step and also the foundation for processing AE/MS signals. …
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Imaging the Soultz Enhanced Geothermal Reservoir using double-difference tomography and microseismic data
… methods. The stimulations produced over 12000 microseismic events of which we chose 8930 for further analysis. We obtained high accuracy cross-correlation differential times and then performed a double-difference tomographic inversion to jointly invert for velocity structure and event …
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New technologies for unconventional reservoir characterization: Seismic inversion, focal-time estimation, and signal processing to improve reservoir imaging
Seismic data, comprising both passively and actively recorded data, have long been used for resource evaluation and geohazard assessments. Unconventional resource extraction, such as Alberta’s Duvernay play, requires a multifaceted approach to optimize reservoir development and to mitigate …
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PetroVis & FractVis: Interactive Visual Exploration of High-dimensional Oil and Gas Data
… within the oil and gas domain deal with ‘big data’–large sets of multidimensional data. Effectively analyzing these data sets is crucial to understanding the structure and the behaviour of oil and gas fields, and to the optimization of hydrocarbons production. However, experts face many …
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Geologic interpretations of seismic scattering and attenuation for the Cianten Caldera and the surrounding area
… a commercial scale. The Cianten Caldera has been microseismically monitored along with the producing Awibengkok field as injections and fracing in that field have occurred. This microseismic data is analyzed with Multi Window Time Lapse Analysis (MWTLA) to find values for the scattering …
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Spatio-temporal microseismic analysis of the Woodford Shale, Canadian County, Oklahoma
Microseismicity provides data that can be used to monitor hydraulic fracture stimulation programs as well as to characterize the resulting hydraulic fractures. This is especially important in low permeability gas and oil shales, where the creation of additional permeability through these fracture …
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Microseismic guided wave eigenfunction theory with application to event depth classification in the Eagle Ford shale
… theory, and a novel application for microseismic event depth constraint to an unconventional reservoir is developed. Eigenfunctions, historically used in the analysis of Rayleigh and Love surface waves, allow rapid calculation of response functions that are linearly-correlated with …
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Elastic time-reverse imaging and transmission tomography for microseismic and DAS VSP data
… that produce high-quality passive-source (e.g., microseismic) images or structural images of geological interfaces constructed using controlled-source energy (e.g., vibroseis truck or dynamite). Most existing wavefield migration and tomography techniques employed in the oil and gas industry are …
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Faulting and natural fracturing across the DJ Basin: impacts on production from Hereford field, northern Colorado
… optimizing subsequent drilling and completions, data from the legacy phase provides a unique opportunity to characterize in-situ reservoir conditions and how these contributed to the variability observed in the legacy phase of production. Various datasets were provided in order to inform the …
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The structure and seismicity of Icelandic rifts
… in central Iceland, and used the passive seismic data collected from this network to explore crustal structure and volcanic processes in the extensional rift zones. My analysis of persistent seismicity located in an intervening region between individual spreading segments, uniquely records the …
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Modeling, imaging and waveform-inversion in attenuative anisotropic media
… evaluates the difference between two convolved data sets that include reference traces from the observed and simulated data. As illustrated by numerical examples, the proposed SIWI method can produce sufficiently accurate attenuation parameters (albeit with reduced resolution) even for a …
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Anisotropy, focal mechanisms, and state of stress in an oilfield : passive seismic monitoring in Oman
… and injection processes. Serni-permanent passive microseismic monitoring is being conducted in the Yibal field, Oman, to better understand reservoir geomechanics. The network comprises 12 4C stations in 5 monitoring wells which can be used for focal mechanism and anisotropy studies. In this Study, …
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Study of induced seismicity for reservoir characterization
… faults. Then I introduce a new method to locate microseismic events induced by hydraulic fracturing with simultaneous anisotropic velocity inversion using differential arrival times and differential back azimuths. We derive analytical sensitivities for the elastic moduli (Cij) and layer thickness …
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Challenges of geophysical processes and interpretation of an unconventional play: a case study from Wattenberg field, Denver-Julesburg Basin, Colorado, The
… field. The Postle project provided various datasets to investigate, including seismic, borehole logs, distributed fiber optic sensing data, microseismic, and production. Relevant research findings were compared and if applicable were linked to other project data from larger regional analyses …