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Keywords: holdup
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Proceedings Papers

Publisher: BHR Group
Paper presented at the BHR 19th International Conference on Multiphase Production Technology, June 5–7, 2019
Paper Number: BHR-2019-049
... flows can be used to the operator's advantage. The average steady-state holdup increases drastically by entering the liquid loading region. Therefore, when ramping down to below the critical gas velocity, the pipeline starts accumulating liquid. When ramping up to above the critical gas velocity...
Proceedings Papers

Publisher: BHR Group
Paper presented at the BHR 19th International Conference on Multiphase Production Technology, June 5–7, 2019
Paper Number: BHR-2019-077
... multiphase flow hydraulic simulator dip section particle reservoir surveillance sand transport model pipeline flow assurance model flow velocity experiment holdup custom flow assurance model critical velocity integration bhr group mpt2019 upstream oil & gas production monitoring...
Proceedings Papers

Publisher: BHR Group
Paper presented at the BHR 19th International Conference on Multiphase Production Technology, June 5–7, 2019
Paper Number: BHR-2019-247
... to investigate transient behaviour in pipelines and wellbores. flow regime reservoir surveillance calculation production control production monitoring pressure drop simulator upstream oil & gas bhr group mpt2019 holdup production logging prediction diameter deviation hydrate formation...
Proceedings Papers

Publisher: BHR Group
Paper presented at the BHR 19th International Conference on Multiphase Production Technology, June 5–7, 2019
Paper Number: BHR-2019-317
... & simulation upstream oil & gas boundary point pig velocity equation boundary condition bypass pig pig-generated slug bypass time step pig motion two-fluid model liquid slug holdup bhr group mpt2019 discretization eigenvalue pipeline pigging Simulation of slug propagation for by-pass...
Proceedings Papers

Publisher: BHR Group
Paper presented at the BHR 19th International Conference on Multiphase Production Technology, June 5–7, 2019
Paper Number: BHR-2019-389
... ABSTRACT Pseudo-slug flow is widely encountered in gas wells or pipelines with liquid-loading issues. Pseudo-slug characteristics data, such as length, body holdup, frequency, and structure velocity, are very limited in literature despite their importance in modelling and facilities design...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 18th International Conference on Multiphase Production Technology, June 7–9, 2017
Paper Number: BHR-2017-209
... holdup agree reasonably well both mutually and against experimental data for small-diameter pipes at gentle inclination, predictions vary by 50% or more under field conditions. The extent of scatter in predicted holdup is a large fraction of available slug catcher capacity. Analysis indicates...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 17th International Conference on Multiphase Production Technology, June 10–12, 2015
Paper Number: BHR-2015-G2
...Experiments for low liquid loading with liquid holdup discontinuities in two- and three-phase flows J Kjølaas, T E Unander, M Wolden SINTEF Petroleum AS, Norway P S Johansson, H Holm Statoil, Norway ABSTRACT Experiments for low liquid loading in two- and three-phase flows have been conducted...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 17th International Conference on Multiphase Production Technology, June 10–12, 2015
Paper Number: BHR-2015-G3
... experiment reservoir surveillance production control bhr group 2015 upstream oil & gas supercritical flow biberg critical point equation holdup critical holdup flow rate simulation production logging liquid superficial velocity inclination international conference production...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 17th International Conference on Multiphase Production Technology, June 10–12, 2015
Paper Number: BHR-2015-E1
... monitoring holdup pipeline Small scale experiments on surge waves in low liquid loaded pipes S I Grødahl 1, Z Yang 1,2, O J Nydal 1 1 Department of Energy and Process Engineering, Norwegian University of Science and Technology, Norway 2 Research, Development and Innovation, Statoil ASA, Norway ABSTRACT...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 16th International Conference on Multiphase Production Technology, June 12–14, 2013
Paper Number: BHR-2013-B2
... to assess prediction uncertainties we are in this work proposing a new method to specify flow model uncertainties. First we have reviewed a comprehensive database of laboratory measurements of primarily pressure drop and holdup. Datasets are grouped according to flow conditions. The most significant flow...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 16th International Conference on Multiphase Production Technology, June 12–14, 2013
Paper Number: BHR-2013-C4
... holdup, pressure drop and flow regime. The model framework includes stratified, slug and dispersed bubble flow. Suitable existing closure laws have been identified and they were improved where necessary. Predictions with the new model are compared to the new experimental data. flow regime...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 16th International Conference on Multiphase Production Technology, June 12–14, 2013
Paper Number: BHR-2013-E5
... below on the basis of steady-state simulations performed with a thoroughly validated, © BHR Group 2013 Multiphase 16 267 commercial simulator, using fluid compositions and conditions from operating assets or on-going field developments. The liquid holdup is the main focus here. The sensitivity...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 15th International Conference on Multiphase Production Technology, June 15–17, 2011
Paper Number: BHR-2011-F2
... and robustness are essential. two-phase flow holdup multiphase 15 df model solution surface horizontal flow fraction shi unified model prediction objective function optimized parameter flow model fluid dynamics artificial intelligence production logging multiphase flow bhr group 2011...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 15th International Conference on Multiphase Production Technology, June 15–17, 2011
Paper Number: BHR-2011-G2
.... New holdup and pressure drop data in inclined stratified flow were acquired, which are compared with predictions of the standard homogeneous and two-fluid models. The comparisons help to assess the limitations of the two-fluid model for stratified flow. upstream oil & gas wallis 1969...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 15th International Conference on Multiphase Production Technology, June 15–17, 2011
Paper Number: BHR-2011-G3
... (Exxsol D80) and a high (Nexbase 3080) viscosity oil and SF6 gas were compared with OLGA point-model simulations. Good agreement was found for Exxsol D80 pressure drop and holdup, although OLGA overpredicted slug flow. For Nexbase 3080 OLGA predicted slug flow for most data points observed as stratified...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 14th International Conference on Multiphase Production Technology, June 17–19, 2009
Paper Number: BHR-2009-J1
... upstream oil & gas production control tomography system numerical scheme holdup void zone void front high riser order scheme equation high void zone gamma densitometer reservoir surveillance riser slug Void fronts in pipeline-riser slug flow M Nordsveen StatoilHydro ASA, Norway P...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 14th International Conference on Multiphase Production Technology, June 17–19, 2009
Paper Number: BHR-2009-J3
... drift-flux model production monitoring sintef diesel data contribution formulation production logging two-fluid model reservoir surveillance pressure drop production control holdup fan conocophillips company equation friction factor bhr group 2009 Relationship between mixture and two...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 13th International Conference on Multiphase Production Technology, June 13–15, 2007
Paper Number: BHR-2007-A3
... ABSTRACT In slightly upwardly inclined pipes with low liquid flow rates there exists a region were the holdup increases almost like a discontinuity with decreasing gas flow. To predict this transition region accurately is of great importance for design and operation of gas-condensate pipelines...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 13th International Conference on Multiphase Production Technology, June 13–15, 2007
Paper Number: BHR-2007-C1
... measurements were made using gamma- and X-ray systems capable of discriminating between the two liquid phases. Data were obtained for the time averaged liquid phase hold-ups and, by conditional sampling, the holdup in the bodies of the slugs. Data were also obtained on slug initiation and on the evolution...
Proceedings Papers

Publisher: BHR Group
Paper presented at the 13th International Conference on Multiphase Production Technology, June 13–15, 2007
Paper Number: BHR-2007-C5
... ABSTRACT Gas-condensate pipelines with very low liquid drop out (Usl>0.005 m/s) are characterised by low rates of liquid accumulation in upward inclined sections. One particular feature of such flows in moderate upwardly inclined pipes is that there exists a region where the liquid holdup...

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