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 22 for “"Seismic Monitoring"”.
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Feasibility of Seismic Monitoring to Identify Avalanche Activity: Snoqualmie Pass, WA
… transportation of merchandise. The study of seismic signals associated with snow avalanches could allow for greater understanding of avalanche properties, while remote sensing of avalanche activity could help established avalanche control programs and regional avalanche centers with …
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Distributed acoustic sensing: modelling, full waveform inversion, and its use in seismic monitoring
… acoustic sensing (DAS) is a rapidly evolving seismic acquisition technology. Employing rugged and small optical fibers, DAS offers an opportunity for access to acquisition geometries often not accessible to more conventional geophone sensors. This is a highly attractive property of DAS fibers, …
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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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Anisotropy, focal mechanisms, and state of stress in an oilfield : passive seismic monitoring in Oman
… 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, I …
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An Assessment of Hypocenter Errors Associated with the Seismic Monitoring of Induced Hydro-fracturing in Hydrocarbon Reservoirs
… single-well recording geometry used to monitor seismicity during hydro-fracture treatments could provide more accurate hypocenter locations and seismic velocities, improving general reservoir characterization. However, for the real, two-well data set obtained for this project, only S-wave picks …
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High Temperature Seismic Monitoring for Enhanced Geothermal Systems - Implementing a Control Feedback Loop to a Prototype Tool by Sandia National Laboratories
… U.S. energy portfolio. Production areas require seismic monitoring tools to develop and monitor production capability. This paper describes modifications made to a prototypical seismic tool to implement improvements that were identified during previous tool applications. These modifications …
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Development of an early warning system for predicting rock bursts and rock induced displacements in seismically active mining blocks at Mufulira underground mine (deeps section).
… stope face to the east. An early warning monitoring system at Mufulira mine has been developed through modification of the existing micro-seismic monitoring system to allow the quantification of exposure to seismicity and provide a logistical tool to guide the effort into the prevention …
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Numerical Modelling of Seismic Activity at Tabular Orebody Mines in South Africa using the Boundary Element Method
… are generally considered to have the highest seismic hazard in the world, and large seismic events at these mines often produce strong ground vibrations that pose risks of damage to mining excavations, injury to mineworkers and even loss of life. Although most underground mines in South Africa …
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Detection and identification of converted modes and source independent converted phase imaging : Groningen, The Netherlands
Passive seismic monitoring waveform data collected at the Groningen gas field contain many interesting events besides direct P- and S-arrivals. We begin by summarizing the station distribution at Groningen over time and discuss the earthquake catalog. We examine the converted arrivals in order to …
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Seismicity of Libya and related problems
The seismicity of Libya was investigated. Available data of earthquakes, which have occurred in or near Libya during the period 262 A.D. to 1982, have been collected. These data together with geological information are used to investigate the nature of seismic activity and its relationship to the …
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Investigation of time-lapse 4D seismic tuning and spectral responses to CO₂-EOR for enhanced characterization and monitoring of a thin carbonate reservoir
… applications, and success of time-lapse (4D) seismic monitoring of carbonate reservoirs is limited by these systems’ inherent heterogeneity and low compressibility relative to siliciclastic systems. To contribute to the advancement of 4D seismic monitoring in carbonates, an investigation of …
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From Passive Data Collection to Sensor-Level Intelligence
… as smart cities, agriculture, and environmental monitoring. Many of these devices are deployed in resource-constrained environments where stable power, high bandwidth, and continuous connectivity cannot be guaranteed. Traditional cloud-centric architectures, which rely on streaming raw sensor …
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A Study of Mine-Related Seismicity in a Deep Longwall Coal Mine
This study involves seismic monitoring of a deep coal mine. The purpose is to examine the processes responsible for induced seismicity. A seismic network consisting of five three-component short-period seismometers located above the mine recorded the seismic data. The events discussed here occurred …
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Analysis of Seismic Signatures Generated from Controlled Methane and Coal Dust Explosions in an Underground Mine
Examination of seismic records during the time interval of the Sago Mine disaster in 2006 revealed a small amplitude signal possibly associated with an event in the mine. Although the epicenter of the signature was located in the vicinity where the explosion occurred, it could not be unequivocally …
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An Analysis of Focal Parameters with Application to West Texas Micro-Earthquakes
Two types of seismic events related to hydrocarbon production have been extensively studied recently: microseismic events associated with hydraulic fracturing in unconventional reservoirs and induced seismicity associated with fluid extraction and wastewater injection in oil fields. This …
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Full waveform inversion combining rock physics for seismic reservoir characterization and monitoring
… part of reservoir characterization. Most current seismic workflows in this field are based on amplitude variation with offset (AVO). Full waveform inversion (FWI) methods, although computationally more complex than AVO approaches, can produce more accurate elastic models by extracting the full …
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Geophysical Numerical Modeling Approach for Characterizing and Monitoring Potential Carbon Sequestration Injection Sites
… major concern with full scale implementation is monitoring and verifying the permanence of injected CO2. Geophysical methods, an exploration industry standard, are non-invasive imaging techniques that can be implemented to address that concern. Geophysical methods, seismic and electromagnetic, …
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Geophysical properties of carbon monoxide when used as an enhanced oil recovery agent
… critical point, in turn aiding in time-lapse seismic monitoring by enhancing acoustic impedance contrasts of EOR fluids from liquid hydrocarbons to better define affected areas of the reservoir. Laboratory tests were designed to (1) investigate the acoustic phase properties of carbon monoxide …
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Apparent Stress Estimates of Seismic Events Associated with Underground Mining Operations in Sedimentary Rock Units: Implications for Improving Underground Roof Collapse Warning Systems
We analyze recordings of seismic events induced by underground mining operations at the Moonee Colliery, located in Australia, and at the Springfield Pike Limestone Quarry, located in the United States. The data were recorded underground in the vicinity of active mining operations and were …
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