Blar i Institutt for geovitenskap og petroleum på dokumenttype "Doctoral thesis"
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Joint Optimization of Well Placement and Controls for Petroleum Field Development
(Doctoral thesis at NTNU;2014:369, Doctoral thesis, 2014)In this thesis we optimize the drilling location and operational controls of wells in a joint manner to improve the overall development strategy for a petroleum field. In particular, in this thesis we treat the integrated ... -
Laboratory and Numerical Study of Scaling Parameters Used in Modelling of CO2 Storage in Rocks
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:254, Doctoral thesis, 2014)Storage of CO2 in deep saline formations is currently the most promising option for mitigating the impact of climatic changes. The main concern related to CO2 storage in geological formation is safety. It is necessary that ... -
Long offset time-lapse seismic and monitoring of unconventional reservoirs
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:92, Doctoral thesis, 2011)Time-lapse seismic is highly accepted as a reservoir management tool. However, it has severe challenges related to monitoring of stiff rock reservoirs due to relatively small seismic property changes for such reservoirs. ... -
Long-term impact on unlined tunnels of hydropower plants due to frequent start/stop sequences
(Doctoral theses at NTNU;2021:400, Doctoral thesis, 2021)Abstract The concept of unlined pressure tunnel design is well-tested and has a history of more than 100 years. In Norway, more than 95% of hydropower pressure tunnels are unlined and most of it was built between 1950 ... -
Machine learning procedures for automatic well planning in reservoir simulation models
(Doctoral theses at NTNU;2021:404, Doctoral thesis, 2021)Simulation of reservoir models is a tool to optimize the development of an oil and gas reservoir. Part of the development is placement of wells in the reservoir, and this well placement optimization process is performed ... -
Magmatic evolution of the Gállojávri ultramafic intrusion, Norway: Implicaitons for the formation of magmatic sulphide deposits in the Karasjok Greenstone Belt
(Doctoral theses at NTNU;2023:75, Doctoral thesis, 2023) -
Methodological framework and design methodology for developing underwater manipulation systems
(Dr. ingeniøravhandling, 0809-103X; 2003:35, Doctoral thesis, 2003)Until recently, underwater manipulation tasks have been conducted by human divers alone or in co-operation with ROVs equipped with one or two manipulator arms. Divers are flexible and can perform a lot of different work ... -
Methodologies to Determine Cost-Effective Development Strategies for Offshore Fields During Early-Phase Studies Using Proxy Models and Optimization
(Doctoral theses at NTNU;2020:67, Doctoral thesis, 2020)This thesis summarizes research efforts for developing a structured methodology for decision support in feasibility studies and concept planning phases of oil and gas field development. The objective in developing the ... -
Methods for Attenuation of Seismic Ground Roll and 4D Traveltime Inversion Using Diving Waves
(Doctoral thesis at NTNU;, Doctoral thesis, 2014)The thesis comprises methods for seismic data processing, namely seismic ground roll attenuation, as well as a method for 4D traveltime inversion. Ground roll, also known as Rayleigh waves, in land surveys as well as mud ... -
Mineralogical and textural characterization for increased iron oxide recovery. Exemplified on the Storforshei iron formation
(Doctoral theses at NTNU;2019:309, Doctoral thesis, 2019)Process mineralogy is increasingly becoming an important part of quality control in mining operations, and chemical assays are not sufficient for predicting metallurgical performance of complex ore deposits. Knowledge of ... -
Modeling and characterizing acoustic signals from cavity clouds generated by marine seismic air-gun arrays: Implications for marine mammals
(Doctoral theses at NTNU;2018:239, Doctoral thesis, 2018)Marine seismic air-gun arrays generate not only low-frequency (<∼300 Hz) acoustic waves which benefit seismic imaging, but also high-frequencies up to tens of kilohertz. Although such high-frequencies are much weaker than ... -
Modeling and Inversion of Marine Electromagnetic Data: – with applications in hydrocarbon prospecting
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:67, Doctoral thesis, 2013)This thesis deals with modeling and inversion of electromagnetic data for geophysical applications. The main topic is modeling and inversion of marine Controlled Source Electromagnetic (mCSEM) data, but joint inversion of ... -
Modeling and Prediction of Borehole Collapse Pressure during Underbalanced Drilling in Shale
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:39, Doctoral thesis, 2011)Drilling with a bottomhole pressure less than the formation pore pressure (underbalanced) will usually increase the risk of borehole collapse due to yielding or failure of the rock adjacent to the borehole. Understanding ... -
Modeling CO2 Injection in Fractured Reservoirs Using Single Matrix Block Systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:101, Doctoral thesis, 2011)In this thesis, CO2 injection in matrix/fracture systems has been studied using a finely-gridded compositional simulator representing a single matrix block. Three laboratory experiments were modeled to investigate whether ... -
Modeling compositionally-sensitive reservoirs
(Doktoravhandlinger ved NTNU, 1503-8181; 59, Doctoral thesis, 2002)This research work provides guidelines for choosing the PVT model (black-oil or EOS compositional) for full-field reservoir simulation of volatile/near-critical oil and gas condensate fluid systems produced by depletion ... -
Modeling reservoir geomechanicsusing discrete element method:Application to reservoirmonitoring
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:233, Doctoral thesis, 2008) -
Modelling and Experimental Study on the Production of Gas Wells with Associated Liquid
(Doctoral theses at NTNU;2020:340, Doctoral thesis, 2020)Once a gas field is developed liquid production may start and persists sometime during the production life of most dry gas wells. This liquid could be condensate, water, or both, resulting from condensate dropout due to ... -
Modelling and Interpretation of Marine Controlled Source Electromagnetic Data
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:229, Doctoral thesis, 2009)This thesis aims to (i) interpret the marine CSEM data acquired over offshore Angola, Modgunn arch in the Norwegian Sea and Troll West Gas Providence (TWGP), offshore Norway, (ii) evaluate the effects of acquisition ... -
Monitoring Overburden and Reservoir Changes from Prestack Time-Lapse Seismic Data: Applications to Chalk Fields
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:37, Doctoral thesis, 2007)Reservoir compaction due to hydrocarbon production has been observed in several North Sea reservoirs, especially the chalk reservoirs in the southern part. This compaction leads to changes in porosity and permeabilities ... -
Multiscale 3D Analysis of Silicate- Hosted Magnetic Inclusions
(Doctoral theses at NTNU;2022:256, Doctoral thesis, 2022)