Browsing NTNU Open by Author "Krogstad, Stein"
Now showing items 1-9 of 9
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Applying hybrid methods to reduce nonphysical cycles in the flux field
Haugland, Christine Marie Øvrebø (Master thesis, 2012)In this thesis we present the theoretical background for the two-point flux-approximation method; (TPFA), mimetic discretisation methods, and the multipoint flux approximation method; (MPFA). Theoretical arguments concerning ... -
Black-oil minimal fluid state parametrization for constrained reservoir control optimization
Codas, Andres; Foss, Bjarne Anton; Camponogara, Eduardo; Krogstad, Stein (Journal article; Peer reviewed, 2016)We propose to solve a black-oil reservoir optimal control problem with the Direct Multiple Shooting Method (MS). MS allows for parallelization of the simulation time and the handling of output constraints. However, it ... -
Correlating Recovery Factors with Measures of Reservoir Heterogeneity
Nyvoll, Asgeir (Master thesis, 2018)Field scale reservoir simulations are computationally intensive, and therefore also time consuming. This thesis focuses on the development and evaluation of computationally easy measures of reservoir heterogeneity, by ... -
Efficient flow diagnostics proxies for polymer flooding
Krogstad, Stein; Lie, Knut-Andreas; Nilsen, Halvor Møll; Berg, Carl Fredrik; Kippe, Vegard (Journal article; Peer reviewed, 2017)Flow diagnostics refers to a family of numerical methods that within a few seconds can compute visually intuitive quantities illuminating flow patterns and well connections for full 3D reservoir models. The starting point ... -
Graph-based methods for data-driven reservoir modeling
Devold, Ingvild Strømsheim (Master thesis, 2023)Datadrevne metoder innen reservoarmodellering inkluderer både fullt ut databaserte maskinlæringsmetoder og historietilpasning av tradisjonelle matematiske modeller. I denne oppgaven foreslår vi en type hybride, grafbaserte ... -
Improved Optimization Methods For Adjoint-Based Training Of Reduced-Order Models
Khuat, Duy Duc (Master thesis, 2022)Simulasjon av flerfasestrømninger i porøse medier er et viktig felt grunnet dets mange anvendelsesområder. Til tross for dette har beregningskostnadene ofte vært en begrensende faktor i bruken av numeriske metoder for å ... -
Nonlinear Output Constraints Handling for Production Optimization for Oil Reservoirs
Suwartadi, Eka; Krogstad, Stein; Foss, Bjarne Anton (Journal article; Peer reviewed, 2012) -
On Mimetic Finite Difference Methods for Grids with Curved Faces
Bø, Ruben Kristoffer Thomasse (Master thesis, 2012)In this thesis the mimetic finite difference method for grids with curved faces is presented, implemented and tested with an emphasis on applications in reservoir simulation. The thesis gives a brief introduction to reservoir ... -
Reservoir Simulation in Heterogeneous and Fractured Reservoirs
Odsæter, Lars Hov (Doctoral theses at NTNU;2018:165, Doctoral thesis, 2018)Summary of the thesis This thesis addresses simulation of flow and transport of fluids and fluid components in heterogeneous and fractured porous media. Reservoir simulation is a key component in several engineering ...