Now showing items 1-15 of 15

    • An Approach for Investigation of Geochemical Rock-Fluid Interactions 

      Bringedal, Carina; Berre, Inga; Radu, Florin A. (Stanford University, 2014)
      Geochemistry has a substantial impact in exploiting of geothermal systems. When water is injected in a geothermal reservoir, the injected water and in-situ brine have different temperatures and chemical compositions and ...
      Conference object
    • Co2 trapping in sloping aquafiers: High resolution numerical simulations 

      Elenius, Maria; Tchelep, Hamdi A.; Johannsen, Klaus (CIMNE, 2010)
      Conference object
    • Domain decomposition preconditioning for non-linear elasticity problems 

      Keilegavlen, Eirik; Skogestad, Jan Ole; Nordbotten, Jan Martin (International Centre for Numerical Methods in Engineering, 2014)
      We consider domain decomposition techniques for a non-linear elasticity problem. Our main focus is on non-linear preconditioning, realized in the framework of additive Schwarz preconditioned inexact Newton (ASPIN) methods. ...
      Conference objectPeer reviewed
    • Electrical conductivity of fractured media: A computational study of the self-consistent method 

      Sævik, Pål Næverlid; Berre, Inga; Jakobsen, Morten; Lien, Martha (Society of Exploration Geophysicists, 2012)
      Effective medium theory can be used to link conductivity estimation methods with prior knowledge about the distribution of fractures in the investigated geological structure. In the literature, little work has been presented ...
      Conference objectPeer reviewed
    • ENUMATH 2017: Book of Abstracts 

      Unknown author (The University of Bergen, 2017)
      Conference objectPeer reviewed
    • Higher order space-time elements for a non-linear Biot model 

      Borregales Reveron, Manuel Antonio; Radu, Florin Adrian (Springer, 2019)
      In this work, we consider a non-linear extension of the linear, quasi-static Biot’s model. Precisely, we assume that the volumetric strain and the fluid compressibility are non-linear functions. We propose a fully discrete ...
      Conference objectPeer reviewedBook
    • Iterative Linearisation Schemes for Doubly Degenerate Parabolic Equations 

      Both, Jakub; Kumar, Kundan; Nordbotten, Jan Martin; Pop, Iuliu Sorin; Radu, Florin Adrian (Springer, 2019)
      Mathematical models for flow and reactive transport in porous media often involve non-linear, degenerate parabolic equations. Their solutions have low regularity, and therefore lower order schemes are used for the numerical ...
      Conference objectPeer reviewedJournal article
    • Modelling Geomechanical Impact of CO2 Injection Using Precomputed Response Functions 

      Andersen, Odd; Nilsen, Halvor Møll; Gasda, Sarah (EAGE, 2016)
      When injecting CO2 or other fluids into a geological formation, pressure plays an important role both as a driver of flow and as a risk factor for mechanical integrity. The full effect of geomechanics on aquifer flow can ...
      Conference objectPeer reviewed
    • Modelling of the Shear Dilation Based Hydraulic Stimulation in Enhanced Geothermal Systems Considering Fractures in Different Scales 

      Ucar, Eren; Berre, Inga; Keilegavlen, Eirik (EGEC, 2016-09)
      A numerical approach for modelling of shear dilation of existing fractures in hydraulic stimulation of geothermal reservoirs at low elevated pressures is presented. The fractured rock in the reservoir is modelled as a ...
      Conference objectPeer reviewed
    • Multiscale Simulation of Non-Darcy Flows 

      Alyaev, Sergey; Keilegarden, Eirik; Nordbotten, Jan Martin (2012-06)
      In this work we present control volume multiscale methods which address problems on the interaction between pore scale and Darcy scale. For the case when linear equations govern the ow on the pore scale our solution converges ...
      Conference objectPeer reviewed
    • On the relationship between multiple porosity models and continuous time random walk 

      Nordbotten, Jan Martin; Vasilyev, Leonid (CIMNE, 2010)
      We derive a multiple porosity model based on the continuous time random walk model (CTRW). In particular, we show how the parameters of the multiple porosity models relate to the transition probability function which is ...
      Conference objectPeer reviewed
    • On the shoaling of solitary waves in the KdV equation 

      Khorsand, Zahra; Kalisch, Henrik (American Society of Civil Engineers, 2014)
      The waveheight change in surface waves with a sufficiently slow variation in depth is examined. Using a new formulation of the energy flux associated to waves modeled by the Korteweg-de Vries equation, a system of three ...
      Conference objectPeer reviewed
    • Pre- and post-lie algebras: The algebro-geometric view 

      Fløystad, Gunnar; Munthe-Kaas, Hans (Springer, 2019)
      We relate composition and substitution in pre- and post-Lie algebras to algebraic geometry. The Connes-Kreimer Hopf algebras and MKW Hopf algebras are then coordinate rings of the infinite-dimensional affine varieties ...
      Conference objectPeer reviewedJournal article
    • Reexamining CO2 Storage Capacity and Utilization of the Utsira Formation 

      Andersen, Odd; Nilsen, Halvor Møll; Lie, Knut-Andreas (EAGE, 2014)
      In this work we provide estimates of CO2 storage capacity of the Utsira Formation using the recently provided datasets from the Norwegian Petroleum Directorate, taking CO2 density variation into account. We also investigate ...
      Conference object
    • A unified multilevel framework of upscaling and domain decomposition 

      Sandvin, Andreas; Nordbotten, Jan Martin; Aavatsmark, Ivar (International Center for Numerical Methods in Engineering (CIMNE), 2010)
      We consider multiscale preconditioners for a class of mass-conservative domain-decomposition (MCDD) methods. For the application of reservoir simulation, we need to solve large linear systems, arising from finite-volume ...
      Conference object