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 9 of 9 for “"borehole logs"”.
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Orientation of the maximum horizontal stress (SHmax) in the Orange basin and Outeniqua sub-basins of South Africa : neotectonic implications
… offshore provide an opportunity to utilise the borehole breakout technique to derive quality SHmax orientation data. In collaboration with the World Stress Map Project (WSM), and utilising borehole logs provided by the Petroleum Agency South Africa (PASA), training and software was provided to …
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Multiscale determination of in situ stress and fracture properties in reservoirs
… and fracture properties in reservoirs using borehole logs and surface seismic reflection data. The dissertation covers four subtopics. The first is the determination of horizontal stress magnitudes from measurements in a borehole. Two types of data used are stress-induced rock failures in the …
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Incorporating prior information into geophysical inversion: from regularized inversion of thermal data to a framework using conditional variational autoencoders
… distributions of thermal conductivity from borehole temperature data and surface heat flow data. The naïve application of Tikhonov inversion produces unrealistically smooth models that only contain structure near data locations, so I employ sensitivity-based model weighting and an lp model …
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Improving Deep Exploration with Cost-Effective Geophysical Methods
… manner. First, by combining geophysical, borehole, and open-source spatial data, a 3D model was synthesized for a volcanogenic massive sulphide (VMS) deposit located in Nash Creek, NB. Evaluating this model showed a need for structural controls to better understand the genesis of the …
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Characterization of the hydrostratigraphic units of the Sodwana area using the electrical resistivity method
… the Mgobolezeni Catchment, Sodwana. Monitoring boreholes were drilled by the Department of Water Affairs (DWA) at several locations in the study area for the purpose of monitoring groundwater changes in the Catchment. There was a need to interpolate the geology and groundwater conditions between …
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Quaternary environmental changes in the fluvial and faunal history of central Northamptonshire
… data, supported by a study of geological maps, borehole logs and papers, are employed to produce a new hypothesis to explain the Quatemary development of the Milton River and the River Nene. The alignment of the Milton Formation Valley is established to have proceeded to the east of, but …
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Groundwater Modeling and Hydrogeological Parameter Estimation: Potomac Aquifer System, SWIFT Research Center
… are within the same order of magnitude. Using borehole logs as well as apparent conductance and resistivity logs, multiple single and multi-layered models for both the upper and middle Potomac aquifers were produced with MODFLOW. Parameter estimation using MODFLOW and PEST and the two sets of …
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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
… 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 to enhance the characterization of the …
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Stratigraphy, Structure, and Fluid Flow at the Soda Lake Geothermal Field, western Nevada, USA
… the Soda Lake area from analysis of cuttings, borehole geophysical logs, and radiometric dates of key igneous units. It was validated against exposed stratigraphic sections in the surrounding ranges and interpreted basin-fill sections derived from wells across the Carson Sink basin. Pursuant to …