Browsing NTNU Open by Author "Berg, Carl Fredrik"

Now showing items 1-20 of 47

    • A Machine Learning Approach for Net Pay Estimation from Borehole Image Logs 

      Estuariwinarno, Mikael Yuan (Master thesis, 2020)
      In the realm of hydrocarbon exploration, net pay estimation is essential for the economic calculation and valuation of the field. By definition, net pay is the reservoir interval with economically producible hydrocarbons ...

    • A Numerical and Analytical Investigation of the Relation Between Transport Properties and Grain Size Distribution 

      Engeskaug, Kristian (Master thesis, 2018)
      There have been many and varied attempts describing the relation between transport and rock properties for porous materials, including the work of Kozeny (1927), Carman (1938), and Berg (1970). Common features of these ...

    • A Pore Network Investigation of Factors Influencing the Residual Oil Saturation 

      Torland, Anders (Master thesis, 2018)
      In this thesis a pore network modelling approach is used to investigate the correlation between different pore structure descriptors and the residual oil saturation at the capillary limit. For this study, a range of ...

    • An Experimental and Numerical Study of Diffusion and Electrical Conductivity in Porous Media 

      Blytt, Hedda Henriksdatter (Master thesis, 2017)
      In this Thesis the effective diffusion coefficient, the diffusibility and the formation factor in a porous medium are studied by preforming a diffusion experiment and electrical conductivity measurements. The main purpose ...

    • An Experimental and Numerical Study of Polymer Injection in Layered Synthetic Porous Media 

      Moe, Eline Skurtveit (Master thesis, 2015)
      In this Master thesis there was conducted polymer flooding of two-layered synthetic cores, where the two layers had different permeabilities, representing a stratified reservoir. The main purpose of this thesis was to ...

    • Automated Lithology Classification Employing Whole Core CT-Scans 

      Chawshin, Kurdistan (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 porosity estimation using CT-scans of extracted core data 

      Chawshin, Kurdistan; Berg, Carl Fredrik; Varagnolo, Damiano; Lopez, Olivier (Peer reviewed; Journal article, 2022)
      Estimation of porosity at a millimeter scale would be an order of magnitude finer resolution than traditional logging techniques. This enables proper description of reservoirs with thin layers and fine scale heterogeneities. ...

    • Calculation and Visualization of Energy Dissipation and Energy Balance in Reservoir Models 

      Berylian, Fadhil (Master thesis, 2020)
      During the production lifetime of a hydrocarbon reservoir, various forms of energy are involved: external energy through wells, internal energy stored in the reservoir itself, and dissipated energy as heat released to the ...

    • Classifying Lithofacies from Textural Features in Whole Core CT-Scan Images 

      Chawshin, Kurdistan; Gonzalez, Andres; Berg, Carl Fredrik; Varagnolo, Damiano; Heidari, Zoya; Lopez, Olivier (Peer reviewed; Journal article, 2021)
      X-ray computerized tomography (CT) is a nondestructive method of providing information about the internal composition and structure of whole core reservoir samples. In this study we propose a method to classify lithology. ...

    • Collaborative optimization by shared objective function data 

      Angga, I Gusti Agung Gede; Bellout, Mathias; Bergmo, Per Eirik Strand; Slotte, Per Arne; Berg, Carl Fredrik (Peer reviewed; Journal article, 2022)
      This article presents a collaborative algorithmic framework that is effective for solving a multi-task optimization scenario where the evaluation of their objectives consists of two parts: The first part involves a common ...

    • Contact Angles in Two-Phase Flow Images 

      Hosseinzade Khanamiri, Hamid; Slotte, Per Arne; Berg, Carl Fredrik (Peer reviewed; Journal article, 2020)
      In this work, we calculate contact angles in X-ray tomography images of two-phase flow in order to investigate the wettability. Triangulated surfaces, generated using the images, are smoothed to calculate the contact angles. ...

    • 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 ...

    • Derivative-free search approaches for optimization of well inflow control valves and controls 

      Bellout, Mathias Chakib Rodriguez; Lima Silva, Thiago; Bakke, Jan Øystein Haavig; Berg, Carl Fredrik (Journal article; Peer reviewed, 2024)
      Decisions regarding problem conceptualization, search approach, and how best to parametrize optimization methods for practical application are key to successful implementation of optimization approaches within georesources ...

    • Description of Free Energy for Immiscible Two‐Fluid Flow in Porous Media by Integral Geometry and Thermodynamics 

      Khanamiri, Hamid Hosseinzade; Berg, Carl Fredrik; Slotte, Per Arne; Schlüter, Steffen; Torsæter, Ole (Journal article; Peer reviewed, 2018)
      In integral geometry, intrinsic volumes are a set of geometrical variables to characterize spatial structures, for example, distribution of fluids in two‐fluid flow in porous media. McClure et al. (2018, https://doi.org/ ...

    • Effect of CO2 tax on energy use in oil production: waterflooding optimization under different emission costs 

      Angga, I Gusti Agung Gede; Bellout, Mathias; Kristoffersen, Brage Strand; Bergmo, Per Eirik Strand; Slotte, Per Arne; Berg, Carl Fredrik (Peer reviewed; Journal article, 2022)
      Tackling emissions from hydrocarbon production is a necessity because hydrocarbon production will last for a prolonged time. As a popular hydrocarbon production method, waterflooding operation is energy-intensive and ...

    • The effect of hydrocarbon prices and CO2 emission taxes on drainage strategies 

      Sutoyo, Handita Reksi Dwitantra; Schümann, Heiner; Berg, Carl Fredrik (Peer reviewed; Journal article, 2024)
      Secondary recovery methods, such as water and gas injection, are effective and cost-efficient techniques for enhancing hydrocarbon recovery; however, they are highly energy-intensive, leading to a large environmental ...

    • Effect of Water Quality on Wettability Alteration in Carbonates 

      Azizov, Ilgar (Master thesis, 2019)
      The topic of the master's thesis is the wettability alteration in carbonates by Low Salinity enhanced oil recovery (EOR). Wettability alteration towards more water-wet upon reduction of salinity and/or manipulation of ionic ...

    • 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 ...

    • Efficient well placement optimization under uncertainty using a virtual drilling procedure 

      Kristoffersen, Brage Strand; Silva, Thiago Lima; Bellout, Mathias; Berg, Carl Fredrik (Peer reviewed; Journal article, 2021)
      An Automatic Well Planner (AWP) is used to efficiently adjust pre-determined well paths to honor near-well properties and increase overall production. AWP replicates modern geosteering decision-making where adjustments to ...

    • Eksperimentell Studie av Økt Utvinningsgrad med Lav Salinitetsvæsker i Karbonat 

      Løvereide, Marie Bjørdal (Master thesis, 2019)
      Økt oljeutvinning ved lav-salinitets vanninjeksjon kan være en god metode for fukt- endring av karbonatreservoarer. Ved bruk av Amott-celler som tåler høy temperatur er effekten på spontan imbibering ved bruk av fem ulike ...