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 18 of 18 for “"self-potential"”.
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Waterflood monitoring using borehole self-potential data
… an oil reservoir. I simulate borehole electric potentials associated with a two-phase flow between two wells in a heterogeneous reservoir. The flow of the water phase generates a source (streaming) current density, which is responsible for the occurrence of an electrical field that can be …
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Modeling and inversion of self-potential data
… to the acquisition, modeling, and inversion of self-potential data. The primary goal is to facilitate the interpretation of self-potentials in terms of the underlying mechanisms that generate the measured signal. The central component of this work describes a methodology for inverting …
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An environment application of self-potential geophysics
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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A Self-Potential for Monitoring Self-Sustaining Treatment for Active Remediation (STAR)
Self-sustaining Treatment for Active Remediation (STAR) is a novel soil remediation approach for Non-Aqueous Phase liquids (NAPLs) embedded in a porous medium. STAR is based on liquid smoldering combustion which destroys NAPLs while simultaneously generating heat due to the exothermic oxidation …
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The application of the self potential profiling method in the delineation of buried geothermal reservoirs
The self potential measurement has long been a widely used geophysical tool to delineate geological parameters. Borehole applications are well known, and when used in profiling observed potentials across an area, ore bodies can be located and boundaries defined. The self-potential profiling …
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Forward modelling and inversion of streaming potential for the interpretation of hydraulic conditions from self-potential data
The self-potential method responds to the electrokinetic phenomenon of streaming potential and has been applied in hydrogeologic and engineering investigations to aid in the evaluation of subsurface hydraulic conditions. Of specific interest is the application of the method to embankment dam …
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Use of the self-potential method for measurement of subsurface water flow at a pump-and-treat remediation site
The self-potential method (SP) of geophysical surveying has been widely used in environmental and engineering applications, primarily for rough but inexpensive assessment of subsurface flow of fluids, heat, or ions. In this project, the SP method was employed to study the activity at an …
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Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques
… disruptive to the homeostasis of the system. The self-potential method is an electro-kinetic geophysical method that has recently been re-identified as an immensely promising groundwater technique. It is a fast, passive, inexpensive surface technique which requires no drilling. Uniquely and most …
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Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams
… in earthen dams with time-lapse measurements of self-potential anomalies associated with conservative salt and non-conservative heat tracer migration in the subsurface. The method allows for 1) detecting seepage zones in earthen dams and determining the preferential flow paths through seepage …
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Electrical and electromagnetic methods for submarine massive sulfide exploration: a case study of the Palinuro Seamount, Tyrrhenian Sea
… (SMS) deposits: the electromagnetic (EM) and the self-potential (SP) methods. Working with a team from the Helmholtz Center for Ocean Research Kiel (GEOMAR) in Germany, I carried out a first test of a new marine EM configuration consisting of a towed-loop inductive source transmitter and remote …
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Next Generation Monitoring of Critical Welsh Infrastructure: Creating a Starting Point for Integrating Remote Monitoring Data
… that affect the safety of the structure. Here, self-potential is combined with an automated logger, and bespoke software, to test the effectiveness of a more modern monitoring solution for reservoirs. Data was collected over a long period for a site in North Wales. This was then used to test …
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Design and evolution of creative capacity building program for refugee youth empowerment
… solve challenges, work in teams, and recognize self-potential. Since then, this weeklong design workshop has evolved into a multi-stage, modular training program taught over several months. The purpose of this study was to identify the successes and failures of each developmental stage of this …
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Biogeophysical approaches to monitoring contaminated and restored sites
… operates. Tank experiments for geophysical (Self-Potential) quantification of physical properties were chosen as engineered case studies in controlled conditions due to Self-Potential sensitivity to biological alterations. Additional, geoelectrical analysis used to determine general peatland …
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Investigating the impact of microbial interactions with geologic media on geophysical properties
… wave properties, and (3) the natural electrical (self-potential) signatures associated with an in-situ biological permeable reactive barrier (PRB). The results suggest: (1) increases in electrolytic conductivity are consistent with increased concentrations of organic acids and biosurfactants; (2) …
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The Impact of Demographic Variables on Differentiation of Self During the Course of Counseling
… of Bowen's key construct, differentiation of self. There are few studies that explore the effect of demographic variables on levels of differentiation of self. There is also a lack of literature regarding the impact of these demographic moderators on an individual's ability to increase their …
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Mitigating the Problem of Non-uniqueness in Fluid-flow Modeling
… optimum survey design. 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 …
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Milankovitch-driven cyclicity and climate controlled dolomitization of a Late Triassic carbonate platform, Hungary
… time series including lithology, gamma ray, self potential and neutron density. The spectra based on lithology were compared to synthetic spectra generated by computer from platforms subjected differing Milankovitch signals. Most dolomitization of the Hungarian carbonates occurred early in …