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 27 for “"Well logging"”.
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Radioactive Well Logging
… properties of many substances make radioactivity well logging possible. The Gamma Ray Curve records natural radiation; the Neutron Curve records induced radiation. In general the Gamma Ray Curve records formation types while the Neutron Curve records fluid content of the rocks. The Radioactivity …
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High-energy photon transport modeling for oil-well logging
Nuclear oil well logging tools utilizing radioisotope sources of photons are used ubiquitously in oilfields throughout the world. Because of safety and security concerns, there is renewed interest in shifting to electronically-switchable accelerator sources. Investigation of accelerator sources …
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An Analytical Approach to Automate Stratigraphic Correlation using Well Logging Information
Stratigraphic correlation is an essential process and is a prerequisite to several processes in the industry. It is a tedious and time-consuming work process that prevents geoscientists from performing other relevant tasks and becomes a bottleneck to other workflows. With the rapid growth in …
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An improved method of regulating a high voltage power supply for use in oil well logging applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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X-Ray Fluorescence Analysis Of The Bakken And Three Forks Formations Of The Williston Basin, North Dakota And Well Logging Applications
… of Williston Basin core included detailed well-logs showing the vertical distribution of lightweight, mid-range, and trace metal elements. The evidence collected in this research showed that x-ray fluorescence ratios can uniquely chronicle autonomous lithostratigraphic units with higher …
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Application of Machine Learning and Deep Learning Methods in Geological Carbon Sequestration Across Multiple Spatial Scales
… can be accomplished using core analyses and well-logging technologies, which complement each other to produce the most accurate and sufficient subsurface information for pore-scale and reservoir-scale studies. In recent years, the unprecedented data sources, increasing computational …
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System Design of a High-Temperature Downhole Transceiver
… more sophisticated and higher resolution well-logging sensors. Increasing the data rates can also save the industry significant amount of time by decreasing the amount of well-logging excersions and by increasing the logging speed. Previous work done by this research group saw the …
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Acoustic Propagation in Poroelastic Media
… of interest in a variety of areas, including oil well logging, the seepage of contaminants into ground water supplies, and the flow of fluids in packed beds. The aim of this work is to solve the equations of motion for the fluid and solid domains of a porous media, for the propagation of acoustic …
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Frequency Limitation for Triaxial Induction Tools and Dielectric Tools in 1-D Multi-Layered Transverse Isotropic Formation
Triaxial induction tools are used in well logging to efficiently measure formation anisotropy including reservoir rocks that show anisotropy, such as thin laminated reservoirs. Dielectric tools are mainly used to detect fresh water and carbonate. They are vital in distinguishing thinly laminated …
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Improving Seismic-to-well Ties
Seismic-to-well ties are important for seismic interpretation and impedance inversion. Reflectivity can be calculated directly from well logs while its estimation from seismic data requires the determination of the seismic wavelet and the removal of the same. In the presence of anelastic …
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Data Integration and Reservoir Characterization of the Pennsylvanian Bartlesville Sandstone
… associated with this field predates electric well logging and has not been integrated with contemporary databases.</p> <p>To establish a more accurate characterization of the reservoir, these data have been digitized and integrated with current data available to further delineate the Glenn …
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In-situ permeability estimation : a comparison between acoustic and NMR logs
… magnetic resonance (NMR) logs in petroleum well logging has improved significantly in recent years. In this thesis, we review the methods of permeability estimation from Stoneley waves and provide permeability comparisons between acoustic and NMR logs. When a Stoneley wave travels along a …
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A High Temperature RF Front-End of a Transceiver for High Speed Downhole Communications
… used within the field in many areas, such as well logging downhole telemetry systems, power networks, sensors, and actuators. In the past, the industry has managed to use the existing electronics at temperatures up to 150 oC. However, declining reserves of easily accessible natural resources …
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Modelling of the reliability of flip chip lead-free solder joints at high-temperature excursions
… in recent automotive and aircraft crashes as well as the collapse of oil-well logging equipment. To increase the mean time to failure (MTTF) of solder joints in HTE, an in-depth understanding and accurate prediction of the response of solder joints to thermally induced plastic strain damage is …
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Feasibility Analysis and Optimal Design of the Acidizing of Coalbed Methane Wells
… of reduced production in coalbed methane (CBM) wells. In this thesis, the feasibility analysis and optimal design of the acidizing of CBM wells to remove the plugging are researched. First, X-ray diffraction analysis shows that the plugging contains acid-soluble minerals and a field case …
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Application of Machine Learning in Different Stages of Oil Reservoir Development
… and new data effectively. The processes of well logging interpretation and pipeline non-destructive examination (NDE) are time consuming and subjective. Numerical flow simulation models do provide a relatively reliable and appropriate approach to conduct a reservoir analysis, but they are …
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Regional stratigraphy of the Newcastle Formation (Lower Cretaceous) in eastern Montana and western North Dakota
… was also described for all gamma-ray logs. All well logs and formation tops were exported from a LogSleuth TM program and imported into Petra TM for Windows where unit thicknesses were calculated and cross sections were created. These cross sections were arbitrarily labeled 1-38, A-L …
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Exploring wellbore and reservoir temperature profiles in fluid circulation and production operations
<p>"The wellbore heat flow occurs during different well operations resulting from any temperature differences between the wellbore fluid and the adjacent formation. Understanding the direction and mechanism of heat flow whether it is conduction or convection help to represent this heat exchange …
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The Newcastle formation in the Williston Basin of North Dakota
… Black Hills has been traced, through the use of well logs, from near the type section in eastern Wyoming into the subsurface of the Williston Basin. In the Basin, the Newcastle Formation is a very fine to medium grained, gray to white, quartzose sandstone, which overlies the Skull Creek Shale and …
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Deep learning methods for shear log predictions in the Volve field Norwegian North Sea
… Often, shear logs are missing to reduce well logging costs, or the data are of poor quality due to poor borehole conditions, or cycle-skipping. This thesis discusses artificial neural networks (ANNs) for shear log predictions using data from the Volve field, in the Norwegian North Sea. In …
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