Blar i Institutt for geovitenskap og petroleum på dokumenttype "Doctoral thesis"
Viser treff 41-60 av 223
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Development of a new seabed coupled shear wave source:: VibroPile
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:197, Doctoral thesis, 2008)This thesis describes the development of a new seismic shear wave source - VibroPile. The source has been developed to be installed on the sea oor. It can however also be used as an onshore shear wave generator, e.g. in ... -
Development of Methods for Reservoir Description and Modelling Under Production and Prediction of Future Performance
(Doctoral theses at NTNU;2019:386, Doctoral thesis, 2019) -
Development of process mineralogy for optimization and increased value of the mineral production in Sibelco Nordic
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:228, Doctoral thesis, 2013)Process mineralogy is a term well known to the mining industry considering high income products like precious minerals and metals, but for lower income products like industrial minerals the term is not so familiar or ... -
Different aspects of detecting karst with geophysical methods - Tales from the underworld
(Doctoral theses at NTNU;2020:406, Doctoral thesis, 2020)The work in this thesis integrate conventional seismic interpretation, gravity survey data, field data from analogues and state-of-the-art numerical modeling in order to broaden and increase the understanding of the ... -
A digital approach to modeling tubular wear and its effects on well integrity
(Doctoral theses at NTNU;2022:122, Doctoral thesis, 2022)Drilling of wells for exploration and production of petroleum resources requires thorough analysis of well integrity. Well integrity can be defined as the application of technical, operational and organizational solutions ... -
Dissolution and carbonation of mechanically activated olivine-Investigating CO2 sequestration possibilities
(Doctoral Theses at NTNU, 1503-8181; 2010:5, Doctoral thesis, 2010)Mineral carbonation used for CO2 sequestration faces three main challenges: increasing the overall carbonation rate, handle large amounts of feedstock and products, and developing a practical process with commercially ... -
Dynamics and glacial history of the Drangajökull ice cap, Northwest Iceland
(Doctoral thesis at NTNU;2015:247, Doctoral thesis, 2015)This thesis describes the glacial history, glacier dynamics, sediments and landforms of the Drangajökull ice cap as well as the glacial history and dynamics of the eastern Vestfirðir peninsula in northwest Iceland from ... -
Effects of reservoir compaction on seismic and gravity monitoring
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:6, Doctoral thesis, 2011)The compacting reservoir embedded in a homogeneous, isotropic and elastic medium, known as Geertsma’s model, is a model commonly used in feasibility studies for forecasting time-lapse changes due to hydrocarbon production. ... -
Effects of Well Temperature on Wellhead Fatigue Assessment
(Doctoral theses at NTNU;2018:175, Doctoral thesis, 2018)Summary Construction and later re-entering of subsea wells require the use of a tubular component called riser to connect the rig to the wellhead. The motions of the rig and of the riser itself, which are created by the ... -
Efficient Drilling Problem Detection: Early fault detection by the combination of physical models and artificial intelligence
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:170, Doctoral thesis, 2009)The drilling of an oil or gas well is an expensive undertaking. Hence, it is not surprising that mistakes and accidents during drilling incur a high cost. Accidents could result in the loss of expensive equipment and ... -
Engineering Geological Considerations for the Planning of TBM Tunnels in Norway
(Doctoral theses at NTNU;2017:169, Doctoral thesis, 2017)The use of tunnel boring machines (TBMs) was extensive in Norway during the larger scale hydropower development between the 1970s and the 1990s, and clients, contractors and research institutions contributed to the ... -
Enhanced Oil Recovery by Low Salinity Surfactant: Effect of Ions on Core and Pore Scales
(Doctoral theses at NTNU;2016:211, Doctoral thesis, 2016)Enhanced oil recovery (EOR) by surfactants is a well-established method in the petroleum industry. In a surfactant flooding, oil is mobilized and recovered by reduction of the interfacial tension (IFT) between oil and water ... -
Enhanced oil recovery using silica nanoparticles: An experimental evaluation of oil production, recovery mechanisms and nanofluid stability
(Doctoral theses at NTNU;2017:328, Doctoral thesis, 2017) -
Estimation of cuttings concentration during drilling using experimental data - a hybrid computational intelligence modeling approach
(Doctoral theses at NTNU;2024:58, Doctoral thesis, 2024)Poor hole cleaning can be quite costly as it can lead to different operational problems such as mechanical stuck pipe, premature bit wear, slow drilling progress, formation fracturing, excessive drillstring torque and drag ... -
Experimental and Numerical Study of Density-Driven Natural Convection Mechanism During Storage of CO2 in Brine Aquifers
(Doctoral thesis at NTNU;2015:170, Doctoral thesis, 2015)Storage of CO2 into geological formations is a reasonable technical choice for decreasing carbon dioxide emissions to the atmosphere. Brine aquifers are considered as one of the most favorable options for this purpose ... -
Experimental investigation of surface-functionalised silica nanoparticles for enhanced oil recovery
(Doctoral theses at NTNU;2020:66, Doctoral thesis, 2020)Enhanced oil recovery (EOR) using nanoparticles (NPs) has been proposed as a solution in the petroleum industry to overcome declining production rates. Research has shown that commercially available hydrophilic silica NPs, ... -
Experimental Investigation of Temperature Dependency of Relative Permeability Data in Heavy Oil Systems with Applications to Thermal Recovery
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:73, Doctoral thesis, 2013)Heavy oil and tar sands are important hydrocarbon resources that are destined to play an increasingly important role in the oil supply of the world. A huge proportion of total world oil resources are in the form of these ... -
Experimental Investigation of the Role of Relative Permeability and Wettability in Geological CO 2 Storage in Saline Aquifer
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:310, Doctoral thesis, 2012)The first task for carbon capture and storage is to find suitable locations to store CO2 safely and permanently. Saline aquifers are considered to be one of the best options for CO2 storage. This study can be divided into ... -
Experimental Investigationand Numerical Simulation ofThermal Recovery ProcessesApplicable in AthabascaBitumen Reservoirs
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:274, Doctoral thesis, 2013)Due to reduction of high quality oil resources and consequently increase of oil price around the world, new sources of energy should be found to relief the high demand of energy. Hence, countries like Venezuela, United ... -
Experimental Studies of Microbial Enhanced Oil Recovery
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:272, Doctoral thesis, 2012)The main purpose of this work was to understand the driving mechanisms by which the bacterium Rhodococcus sp. 094 increases oil recovery. The reason for only using this species was to thorougly investigate different aspects ...