Now showing items 1-20 of 439

    • 2.5D Inversion and Joint Interpretation of CSEM Data at Sleipner CO2 Storage 

      Park, Joonsang; Sauvin, Guillaume; Vöge, Malte (Peer reviewed; Journal article, 2017)
      In this paper, we revisit the marine controlled-source electromagnetic (CSEM) data, acquired above the Sleipner CO2 storage, in order to further study the dataset and conclude the feasibility of marine CSEM for offshore ...
    • 3D fault integrity screening for Smeaheia CO2 injection site 

      Skurtveit, Elin; Choi, Jung Chan; Mulrooney, Mark; Osmond, Johnathon Lee; Braathen, Alvar (Lecture, 2018)
    • 3D fault integrity screening for Smeaheia CO2 injection site 

      Skurtveit, Elin; Choi, Jung Chan; Osmond, Johnathon Lee; Mulrooney, Mark Joseph; Braathen, Alvar (Lecture, 2018)
      Task leader, Elin Skurtveit presents the GHGT paper "3D fault integrity screening for Smeaheia CO2 injection site" together with plans for future work.
    • 3D FE tool for time dependent settlement predictions 

      Jostad, Hans Petter; Sivasithamparam, Nallathamby; Woldeselassie, B.H.; Lacasse, Suzanne (Chapter, 2016)
      A newly developed calculation tool for fully coupled general 3D finite element consolidation analyses is presented. The development has been part of an ongoing Research and Development project called GeoFuture and the tool ...
    • 3D foundation model library 

      Løkke, Arnkjell; Page, Ana M.; Skau, Kristoffer S. (NGI Rapport;20150014-11-R, Report, 2018-11-07)
      The REDWIN project (REDucing cost of offshore WINd by integrated structural and geotechnical design) is a 4-year research project, funded primarily by the Research Council of Norway (NFR) through the ENERGIX program, ...
    • A Benchmark Case Study for Seismic Event Relative Location 

      Gibbons, Steven John; Kværna, Tormod; Tiira, Timo; Kozlovskaya, Elena (Peer reviewed; Journal article, 2020)
      “Precision seismology” encompasses a set of methods which use differential measurements of time-delays to estimate the relative locations of earthquakes and explosions. Delay-times estimated from signal correlations often ...
    • A Boussinesq type extension of the GeoClaw model - a study of wave breaking phenomena applying dispersive long wave models 

      Kim, Jihwan; Pedersen, Geir Kleivstul; Løvholt, Finn; LeVeque, Randall J. (Peer reviewed; Journal article, 2017)
      The nonlinear shallow water model is widely used in the study of tsunami propagation, but an increasing number of studies are dedicated to the dispersion dynamics of tsunamis. If the wave dispersion becomes important, ...
    • A climatic trigger for the giant Troll pockmark field in the northern North Sea 

      Mazzini, Adriano; Svensen, Henrik; Forsberg, Carl Fredrik; Linge, Henriette; Lauritzen, Stein-Erik; Haflidason, Haflidi; Hammer, Øyvind; Planke, Sverre; Tjelta, Tor-Inge (Journal article; Peer reviewed, 2017)
      Pockmarks are seafloor craters usually formed during methane release on continental margins. However, the mechanisms behind their formation and dynamics remain elusive. Here we report detailed investigations on one of the ...
    • A Constitutive Model for Soft Clays Incorporating Elastic and Plastic Cross-Anisotropy 

      Castro, Jorge; Sivasithamparam, Nallathamby (Peer reviewed; Journal article, 2017)
      Natural clays exhibit a significant degree of anisotropy in their fabric, which initially is derived from the shape of the clay platelets, deposition process and one-dimensional consolidation. Various authors have proposed ...
    • A field laboratory for monitoring CO2 leakage 

      Dillen, Menno; Lindeberg, Erik Gøsta Brun; Aagaard, Per; Aker, Eyvind; Sæther, Ola Magne; Johansen, Harald; Lien, Martha; Hatzignatiou, Dimitrios Georgios; Golmen, Lars Gunder; Hellevang, Jon Oddvar (Journal article, 2009)
      The long-term safety of future CO2 storage projects in aquifers will not only rely on a comprehensive geological characterisation of the formation and capillary seal, but also on the ability to effectively monitor the ...
    • A Framework for Versatile Shape of Yield Surfaces for Structured Aniso-tropic Soft Soils 

      Sivasithamparam, Nallathamby; Castro, Jorge (Chapter, 2016)
      A framework based on logarithmic contractancy is proposed to produce versatile shapes of yield surfaces for structured anisotropic clays. The recently proposed constitutive model (E-SCLAY1S) is an extension of existing ...
    • A geochemical, mineralogical and geotechnical characterization of the low plastic, highly sensitive glaciomarine clay at Dragvoll, Norway 

      Helle, Tonje Eide; Aagaard, Per; Nordal, Steinar; Long, Michael; Bazin, Sara (Peer reviewed; Journal article, 2019)
      The sediments at the NTNU research site Dragvoll, Trondheim, Norway accumulated in seawater close to the glacier front during the Pleistocene-Holocene transition. A comprehensive site investigation and laboratory test ...
    • A GIS method for assessment of rock slide tsunami hazard in Norwegian lakes and reservoirs 

      Romstad, Bård; Harbitz, Carl B.; Domaas, Ulrik (Journal article, 2009)
      An evaluation of rock slide tsunami hazard is applied to all Norwegian lakes larger than 0.1 km2 based on their topographical setting. The analysis results in a topographic rock slide potential score that indicates the ...
    • A macro-element for integrated time domain analyses representing bucket foundations for offshore wind turbines 

      Skau, Kristoffer Skjolden; Grimstad, Gustav; Page, Ana M.; Eiksund, Gudmund Reidar; Jostad, Hans Petter (Peer reviewed; Journal article, 2018)
      The paper presents a macro-element model for bucket foundations to be used in integrated time domain analyses of offshore wind turbines. The macro-element has been formulated in the multi-surface plasticity framework, and ...
    • A macro-element model for multidirectional cyclic lateral loading of monopiles in clay 

      Page, Ana M.; Grimstad, Gustav; Eiksund, Gudmund Reidar; Jostad, Hans Petter (Journal article; Peer reviewed, 2018)
      This paper investigates numerically the impact of multidirectional cyclic loads on the response of a monopile in clay supporting an offshore wind turbine (OWT). The results indicate that multidirectional loading modifies ...
    • A macro-element pile foundation model for integrated analyses of monopilebased offshore wind turbines 

      Page, Ana M.; Grimstad, Gustav; Eiksund, Gudmund Reidar; Jostad, Hans Petter (Journal article; Peer reviewed, 2018)
      The design of OWTs relies on integrated load analyses tools that simulate the response of the entire OWT (including the rotor-nacelle assembly, support structure and foundation) under combined aerodynamic and hydrodynamic ...
    • A metagenomic study of methanotrophic microorganisms in Coal Oil Point seep sediments 

      Håvelsrud, Othilde Else; Haverkamp, Thomas Hendricus Augustus; Kristensen, Tom; Jakobsen, Kjetill Sigurd; Rike, Anne Gunn Larsen (Journal article, 2011)
    • A metagenomic study of the microbial communities in four parallel biogas reactors 

      Solli, Linn; Håvelsrud, Othilde Else; Horn, Svein Jarle; Rike, Anne Gunn Larsen (Journal article, 2014)
      This study showed that four parallel reactors co-digesting manure and fish waste silage operated stably during a startup phase. Several important Archaea and Bacteria degrading the protein-rich substrate were identified. ...
    • A multi-spring model for monopile analysis in soft clays 

      Fu, Dengfeng; Zhang, Youhu; Aamodt, Kristoffer Knoph; Yan, Yue (Peer reviewed; Journal article, 2020)
      The offshore wind industry in China has seen a rapid development in recent years and is projected to account for half of global yearly installed capacity in the years to come. Monopiles are a popular foundation solution ...
    • A New Approximate Method for Quantifying Tsunami Maximum Inundation Height Probability 

      Glimsdal, Sylfest; Løvholt, Finn; Harbitz, Carl Bonnevie; Romano, F.; Lorito, S.; Orefice, S.; Brizuela, B.; Selva, J.; Hoechner, A.; Volpe, M.; Babeyko, A.; Tonini, R.; Wronna, M.; Omira, R. (Peer reviewed; Journal article, 2019)
      Regional and global tsunami hazard analysis requires simplified and efficient methods for estimating the tsunami inundation height and its related uncertainty. One such approach is the amplification factor (AF) method. ...