A5071810463- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Advanced X-ray and CT Imaging
- Electrical and Bioimpedance Tomography
- Medical Imaging Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Flow Measurement and Analysis
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Fluid Dynamics and Mixing
- Nuclear reactor physics and engineering
- Radiation Effects in Electronics
- Reservoir Engineering and Simulation Methods
- Geophysical and Geoelectrical Methods
- Astrophysics and Cosmic Phenomena
- Radiation Dose and Imaging
- Graphite, nuclear technology, radiation studies
- Radiation Shielding Materials Analysis
- Black Holes and Theoretical Physics
University of Bergen
2006-2020
Western Norway University of Applied Sciences
2015
Chr. Michelsen Institute
1995-2014
European Organization for Nuclear Research
2012
North Carolina State University
2007-2011
SINTEF
2010
Hospital South West Jutland
1991
The problem of how to accurately measure the flowrate oil–gas–water mixtures in a pipeline remains one key challenges petroleum industry. This paper discusses why three-phase flow measurement is still important and it difficult solve. strategies principal base technologies currently used by commercial manufacturers are described, research developments that could influence future flowmeter design considered. Finally, issues, which will need be addressed users flowmeters, discussed.
The problem of how to meter oil - water gas mixtures has been a significant one in the industry since early 1980s. Since then, considerable research conducted into development three-phase flowmeter suitable for use an offshore environment. This work discusses why flow measurement is important, principal strategies and technologies which may be used flows, reviews status some currently available solutions.
A dual sensor tomograph for three-component flow imaging has been built at the University of Bergen in cooperation with Christian Michelsen Research AS and Norsk Hydro AS. It utilizes an eight-electrode electrical capacitance a -ray five radiation sources 85 compact detectors. Embedded transputers using memory-mapped I/O ensure high-speed data acquisition into Alpha AXP-based on-line processing unit. The first results demonstrate that regime identification is possible rates about 30 frames...
This paper describes low-energy gamma-ray densitometry using a 241Am source for the determination of void fraction and flow regime in oil/gas pipes. Due to reduced shielding requirements this method compared traditional densitometers 137Cs sources, offers compact design advantage multi-beam configuration. One aims investigation was demonstrate use neural network convert spectra into classification fraction, as well determine which detector positions best serve purpose. In addition obtained...
Multibeam gamma-ray densitometry can be applied to identify flow regimes in hydrocarbon multiphase oil, water and gas pipe flows. The acquired regime information used for improved measurement accuracy on volume fractions, as complementary other types of instrumentation, order enhance their accuracy. work presented this paper includes both theoretical calculations experimental three-phase using multibeam densitometry. It is demonstrated that a fan beam geometry with one radiation source...
Multimodality sensing is used for monitoring of multiphase hydrocarbon flow where there a need to measure the quantity oil, water and gas in cross section pipe originating from an oil well. Information on regime, i.e., physical distribution production constituents section, demanded. Expedient information concerning productivity well, produced, transport upstream separation process can be provided by tomographic information. A dual modality tomograph (DMT), consisting capacitance gamma-ray...
Multiphase gas/oil/water measurement has been and still is a challenging task within the petroleum industry. The requirements of efficiency accuracy have continuously increasing at same time as trend to use subsea installations. As response, design SOFA (Subsea Online Fluid Analyser) concept was initiated by Christian Michelsen Research in cooperation with University Bergen. final analyser yet be completed. ultimate goal this development permanently installed metering station which capable...
A data acquisition and control system (DACS) for high-speed gamma-ray tomography based on the USB (Universal Serial Bus) Ethernet communication protocols has been designed implemented. The tomograph comprises five 500 mCi 241Am sources, each at a principal energy of 59.5 keV, which corresponds to detector modules, consisting 17 CdZnTe detectors. DACS design is Microchip's PIC18F4550 PIC18F4620 microcontrollers, facilitates an 2.0 interface protocol (IEEE 802.3) protocol, respectively. By...
High-speed gamma-ray tomography (HSGT) based on multiple fan-beam collimated radioisotope sources has proved to be an efficient and fast method for cross sectional imaging of the dynamics in different industrial processes. The objective system described here is identify flow regime gas/liquid pipe flows. performance such systems characterized by spatial resolution, speed response measurement resolution attenuation coefficient. work presented experimental analysis how geometry reconstruction...
A dual-mode tomography system based on electrical capacitance and gamma-ray has been developed at the Department of Physics Technology, University Bergen. The objective tomograph is to acquire cross-sectional images, i.e. tomograms, hydrocarbon flow comprising oil, water gas constituents. utilizes an eight-electrode sensor set-up mounted around a PVC pipe structure which sensitive permittivity ?r fluid. By using tomograph, produced constituent can be separated from crude oil constituents,...