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 129 for “"Log Data"”.
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Effects of borehole stability on well log data
… the effects of borehole irregularities on well logs and develop methods to obtain reliable formation properties from such logs. Data from a well in eastern Venezuela are analysed. Borehole irregularities in this well consist mainly of borehole enlargements perpendicular to the borehole axis due …
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Permeability prediction from well log data using multiple regression analysis
… involving correlations between core and log data that provide means to obtain permeability.;The present work describes how to predict permeability through the statistical analysis multiple regression having log data and limited core data, making it possible to expand the prediction to …
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Designing practical security systems via information flow analysis of log data
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Parametric inversion from well log data : a performance and robustness analysis
… (Elec. E.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Predicting a detailed permeability profile from minipermeameter measurements and well log data
… purpose of this research was to utilize well log data, mainly gamma ray and density, Minipermeameter values, and basic information such as depth and spatial coordinates to predict permeability in the selected pilot area of the Stringtown field. This differed from previous research in that the …
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Mathematical Analysis of Upscaling Well Log Data from Sonic to Seismic Resolution
… bridges the gap between the high-resolution well log measurements and low-resolution seismic observations. Various upscaling methods have been published and discussed, such as the Simple Averaging method, the Backus Averaging method, the Pair Correlation Function “PCF” method, the General Singular …
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Reservoir Characterization of the Utica Shale Play Using Well Log Data in Columbiana, Ohio
… sandstone and carbonate units. Although some data are available on this play, models that scale from well site through basin are not publicly available. The objective of this research was the production of a petrophysical reservoir model capable of reflecting the geology, geomechanics, and …
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A data-augmented approach to evaluating teamwork using log data from digital collaboration tools
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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A historical perspective on wind data: time, space and vector relationships between ship log data and Cape Royal Astronomical Observatory wind data between 1834 and 1854
This dissertation assesses the extent to which data from the Climatological Database for the World's Oceans (CLIWOC) reflect newly digitized historical wind data captured at the Royal Astronomical Observatory (RAO) in Cape Town, South Africa from 1834-1854. This follows the historical precipitation …
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CO2 body worn logger
… a device which can be used to gather statistical data to be used in verifying where TB transmission mostly takes place, and proper conditions be implemented to minimise the TB transmission. Carbon dioxide Body Worn Device (CBWD) is a device which relies on the battery supply for its function. Its …
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Implementing Differential Privacy for Privacy Preserving Trajectory Data Publication in Large-Scale Wireless Networks
Wireless networks collect vast amounts of log data concerning usage of the network. This data aids in informing operational needs related to performance, maintenance, etc., but it is also useful for outside researchers in analyzing network operation and user trends. Releasing such information to …
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Using rock physics to determine uncertainties in pore-fluid and lithology-estimates from seismic attributes in the Bredasdorp Basin, offshore South Africa
… by combining seismic attributes and wireline log data through rock physics relationships and supervised statistical classification. The workflow was developed mainly for hydrocarbon exploration, but could be used for other purposes, provided the target is seismically detectible. Any prior …
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Automated Detection of Surface Defects on Barked Hardwood Logs and Stems Using 3-D Laser Scanned Data
… defects on the surfaces of barked hardwood logs and stems. The defects detected are at least 0.5 inch in height and at least 3 inches in diameter, which are severe, medium to large in size, and have external surface rises. Hundreds of real log defect samples were measured, photographed, and …
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Predicting permeability and flow capacity distribution with back-propagation artificial neural networks
… successfully demonstrated that the new technology called Artificial Neural Network (ANN), a biologically inspired, massive parallel, distributed information processing system, is an excellent tool for permeability predictions using well log data. This technology overcomes the drawbacks caused …
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Hydrostratigraphic units within the alluvium and tertiary volcanics of East Central Yucca Flat, Nevada Test Site
Lithologic and geophysical log data from 46 boreholes in East Central Yucca Flat, Nevada Test Site, are used to develop lithostratigraphic and hydrostratigraphic columns. Non-zeolitized volcanic lithostratigraphic units geologically correlate to hydrostratigraphic units. Zeolitized volcanic …
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Fluid content effect on acoustic impedance and limits of direct detection capability : illustrated on an offshore prospect
… fluid-contact reflectivities on seismic and well log data from an Offshore prospect showed a remarkable agreement.
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Calculation of a Synthetic Gather using the Aki-Richards Approximation to the Zoeppritz Equations
… coefficients derived from measured well log data are convolved with a Ricker wavelet to create a synthetic seismic trace. The Zoeppritz equations describe the propagation of an acoustic wave across an interface between two viscous media of different acoustic impedances with respect to …
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FITSL : a language for directed exploration and analysis of sequence data
This thesis describes a sequence-data processing toolkit for analysis of Intelligent Tutoring System (ITS) log data, that unlike other tools allows directed exploration of sequence patterns. This system provides a powerful yet straightforward abstraction for sequence-data processing, and a set of …
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Factors Affecting the Programming Performance of Computer Science Students
… In the other study, students submitted detailed logs of how time was spent on projects, along with their programs. Software metrics were computed on the students' source code. Correlations between student performance and the log data and software metric data were sought. No significant indicators …
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