Blar i Institutt for geovitenskap og petroleum på dokumenttype "Doctoral thesis"
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Assessment on the swelling and disintegration potential of weak and weathered rocks in water tunnels of hydropower projects - a contribution based on use of laboratory testing methods
(Doctoral theses at NTNU;2020:354, Doctoral thesis, 2020)Swelling of rocks is a time-dependent phenomenon and a result of multiple and interactive rock characteristics interplaying in a complex picture. Further, the swelling responses of the rock mass are conditioned on the ... -
Automated Lithology Classification Employing Whole Core CT-Scans
(Doctoral theses at NTNU;2021:316, Doctoral thesis, 2021)This thesis evaluates the application of artificial intelligence to detect rock properties from whole core computed tomography (CT) scan images of wells on the Norwegian continental shelf. Whole core CT-scan images provide ... -
Automated Methodologies for Decision Support in Field Development
(Doctoral theses at NTNU;2022:182, Doctoral thesis, 2022)This thesis deals with automated methodologies for decision support of offshore field development planning. The thesis is in two parts: methodology development and application to a real-world field case. In the first ... -
Basin Architecture and Lithospheric Structure of the Barents Sea Region from Geophysical Modelling
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:176, Doctoral thesis, 2012)This thesis provided a new understanding of the lithospheric structural setting and anomalies observed in the greater Barents Sea. The Barents Sea has been focus of attention for geological and economical reason since the ... -
Bioreagents in froth flotation and flocculation of copper, iron and cerium oxides
(Doctoral theses at NTNU;2024:29, Doctoral thesis, 2024) -
Cement Plug Integrity for Well Abandonment
(Doctoral theses at NTNU;2020:30, Doctoral thesis, 2020)Permanent abandonment marks the end of the life of an oil or gas well. Accordingly, the penetrated formation must be isolated, preventing fluid flow to the surface or surrounding formation, with a purpose to give long-term ... -
Cement Sheath Integrity During Thermal Cycling
(Doctoral thesis at NTNU;2015:291, Doctoral thesis, 2015)In the construction process of oil and gas wells, primary cementing constitutes a critical procedure of placing a cement sheath in the annulus between casing and formation, or between the casing strings. The main purpose ... -
Characterization of gas-lift instabilities
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:56, Doctoral thesis, 2005)This dissertation mainly investigates the occurrence and characteristics of density-wave instability in gas-lift wells. The investigation is based on a simplified gas-lift system, in which water and air are used as producing ... -
Close range interactions between air guns
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:293, Doctoral thesis, 2013) -
CO2 fluid flow information from quantitative time-lapse seismic analysis: Illustrated using seismic data from Sleipner, North Sea, Norway
(Doctoral thesis at NTNU;2015:308, Doctoral thesis, 2015) -
Combined Inversion of PP and PS Seismic Data for Static and Dynamic Reservoir Characterization
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:85, Doctoral thesis, 2005)Reservoir properties are mainly determined based on well log information. However, wells in most reservoirs are sparse and widely spread compared to the size of the reservoir. Seismic data is thus one of the most important ... -
Comparison of continuous and discontinuous modelling for computational rock mechanics
(Dr. ingeniøravhandling, 0809-103X; 2002:149, Doctoral thesis, 2003)Computational rock mechanics becomes more and more popular. New programs are constantly under development, and the modelling process has become a natural part of the planning process for many caverns and tunnels, as well ... -
Computational and robustness improvements in waveform inversion
(Doctoral theses at NTNU;2022:313, Doctoral thesis, 2022) -
Data-driven Borehole Imaging and Monitoring
(Doctoral theses at NTNU;2017:329, Doctoral thesis, 2017) -
Data-Driven Reservoir Modeling: Application of Proxy Models in Reservoir Management
(Doctoral theses at NTNU;2023:183, Doctoral thesis, 2023)This Ph.D. thesis consists of 8 papers that summarize the main contents of the research work done over the past 3 years. Due to the ability of machine learning (ML) in capturing high nonlinearity, the thesis mainly touches ... -
Decision Framework for Well Delivery Processes - Application of Analytical Methods to Decision Making
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:30, Doctoral thesis, 2007)A major portion of unproduced oil and gas resources are located in deep-water areas, often at sea level depths between 1500 and 3000 metres. Development of these fields with conventional technology necessitates increasing ... -
Decision support methods for optimizing subsea hydrocarbon production systems with processing equipment
(Doctoral theses at NTNU;2024:111, Doctoral thesis, 2024)As the use of subsea processing increases and technology advances, subsea layout possibilities and configurations diversify and get more complex, causing manual design processes to be cumbersome and often suboptimal. ... -
Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Møre margin
(Doctoral Theses at NTNU, 1503-8181; 2010:154, Doctoral thesis, 2010)This thesis addresses the use of potential field data in two main topics: sub-basalt exploration and structure of the deeper crust. Synthetic models and forward models of the Møre margin were constructed to test the ... -
DENUDATIONAL PROCESSESAND RELIEF DEVELOPMENTIN MOUNTAIN VALLEYS INWESTERN NORWAY:: A HOLOCENE TO CONTEMPORARY TIME PERSPECTIVE
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:290, Doctoral thesis, 2013)The evolution of mountain landscapes is controlled by the interactions between tectonic, climate and geomorphic surface processes through time. The rates at which mountain landscapes change today are a response of both, ... -
Development and Assessment of a Multi-Pipe Oil-Water Bulk Separator Concept for Subsea Applications
(Doctoral theses at NTNU;2019:306, Doctoral thesis, 2019)Subsea produced water separation has emerged as a viable technology for tackling challenges arising from increased water production rates. Removing produced water at the seabed will free up topside capacity constrained ...