Folgerø, Kjetil

Flow Monitoring and Analysis

Flow monitoring and analysis is defined as a strategic research area at CMR. We combine in-depth application knowledge with fundamental competence in measurement science and data analysis to do research on novel measurement solutions and analysis of complex measurement stations.

Flow assurance

CMR is developing sensor systems for detection and characterization of flow assurance related problems.

Electromagnetics

Electromagnetic technology is a core competence area at CMR, and we provide in-depth expertise on EM measurement solutions for a wide range of applications.

Hydrate monitoring and characterization using electromagnetic sensors

CMR is characterizing gas hydrate deposits in pipelines using broad-band electromagnetic measurements.

Permittivity Calculator

Method and tool for estimating crude oil permittivity from composition data.

Salinity and Water-Liquid Ratio Sensor

CMR is developing a sensor system for measurement of water salinity and water-in-liquid ratio (WLR) in multiphase and wetgas flow.

Characterization of Gas Hydrate Formation and Deposition using Dielectric Measurements

Folgerø, Kjetil; Haukalid, Kjetil; Kocbach, Jan; Kinnari, Keijo J.; Askvik, Kjell; Li, Xiaoyun; Cely, Alexandra ;

Joint conference paper with Statoil held at the 9th International Conference on Gas Hydrates

Hydrate formation in water-in-crude oil emulsions studied by broad-band permittivity measurements

Haukalid, Kjetil; Folgerø, Kjetil; Barth, Tanja; Fjermestad, Stian Landmark

To develop more cost-effective and environmentally friendly strategies to prevent the formation of gas hydrate plugs in oil production pipelines, a better understanding of the mechanisms of plug formation is needed. This paper presents broad-band permittivity measurements of hydrate formation in water-in-oil emulsions.

Permittivity Sensors for Detection and Characterization of Hydrate Deposits on Pipe Walls

Sa, Jeong-Hoon; Lee, Bo Ram; Zhang, Xianwei; Kinnari, Keijo J.; Askvik, Kjell; Li, Xiaoyun ; Folgerø, Kjetil; Haukalid, Kjetil; Kocbach, Jan; Sum, Amadeu;

This paper studies the application of permittivity sensors for the detection of hydrate deposition in a vertical pipe experimental system (deadleg). This is a joint conference paper with Colorado School of Mines and Statoil presented at the 9th International Conference on Gas Hydrates.

Broad-band permittivity measurements of formation of gas hydrate layers using open-ended coaxial probes

Haukalid, Kjetil; Folgerø, Kjetil;

Careful measures are taken in the oil and gas industry to avoid the formation of gas hydrate plugs. However, the risk of inhibitor failure, unexpected process changes, and more frequent transport of underinhibited well streams calls for methods to monitor gas hydrate formation. In gas-dominated systems, hydrate plug formation is believed to be initiated by formation of hydrate layers on the pipeline wall.

Hydrate measurement technologies for flow assurance

Folgerø, Kjetil;

Presentation given at Flow Assurance 2015 – Design and Operations of Multiphase Systems in Larvik 2015

Impact of Gas Hydrate Formation/Dissociation on Water-in-Crude Oil Emulsion Properties Studied by Dielectric Measurements

Haukalid, Kjetil; Folgerø, Kjetil; Thomas, Peter James; M. Askvik

The impact of the formation and dissociation of gas hydrates on water-in-crude oil emulsion properties has been studied using a dielectric probe.

Estimation of dielectric properties of crude oils based on IR spectroscopy

J E Carlson; Folgerø, Kjetil; A L Tomren, T Barth

Dielectric properties of crude oils play an important role in characterization and quality control. Measuring permittivity accurately over a wide range of frequencies is, however, a time-consuming task and existing measurement methods are not easily adapted for real-time diagnostics. IR spectroscopy, on the other hand, provides rapid measurements of fundamental molecular properties.

Measurements of water conductivity in oil continuous emulsions

Haukalid, Kjetil; Folgerø, Kjetil;

Monitoring oil–water mixture separation by time domain reflectometry

E M Bruvik; Folgerø, Kjetil; B T Hjertaker; S K Meyer

Effective separation of water and oil is an essential part of petroleum production. Time domain reflectometry (TDR) can be used to profile the separation of hydrocarbon oil–water mixtures. In such two-component systems, metal electrodes will become oil-coated due to their affinity to oil.

Multivariate Analysis of Crude Oil Composition and Fluid Properties Used in Multiphase Flow Metering (MFM)

Andreas L. Tomren; Folgerø, Kjetil; Tanja Barth

Crude oil characterization by infrared (IR) spectroscopy and whole oil gas chromatography (GC) has been used to provide data for establishing multivariate prediction models for physical properties of crude oils.

Optimizing performance of equipment for thermostimulation of muscle tissue using COMSOL Multiphysics

Kocbach, Jan; Folgerø, Kjetil; Louise Mohn, Ole Brix

A multiphysics simulation approach is used in order to analyse and optimize performance of thermostimulation equipment. The temperature distribution and electric field distribution within the body tissue is simulated for varying body composition, for varying design parameters of the thermostimulation equipment and for different heating methods.

Permittivity calculator. Method and tool for calculating the permittivity of oils from PVT data.

Folgerø, Kjetil; A L Tomren; A L Tomren; S Frøyen

A Simulation Approach to Optimizing Performance of Equipment for Thermostimulation of Muscle Tissue using COMSOL Multiphysics

Kocbach, Jan; Folgerø, Kjetil; Louise Mohn; Ole Brix

A multiphysics simulation approach is used in order to analyse and optimize performance of thermostimulation equipment.

Uncertainty analysis of multiphase flow meters used for allocation measurements: Field experiences and future challenges

Folgerø, Kjetil; Kocbach, Jan; Soldal, EL; Åbro, E

Uncertainty analysis of multiphase flow meters used for allocation measurements: Field experiences and future challenges.