... & gas pipe diameter translational velocity pressure drop existence two-phase flow production control production logging flow pattern production monitoring slug flow bhr group 2018 energy density taylor bubble holdup university of tulsa mixture velocity transition probability density...

... calculation of even steady-state holdups under conditions of large pipe inclination and three-phase flow. Other comparisons across simulators, and against experimental or field data, suggest that divergences in prediction are attributable to a few aspects of modelling, such as regime transitions, interfacial...

... as the neglected dynamic and hydraulic gradient terms in (24) are small compared to the gravity and friction terms. Eliminating the pressure gradient among (57) gives the corresponding holdup equations: + g sin = + + + (8) g sin = + (9) where = + is the liquid volume fraction. 2.2...

... of buried pipe configurations. The sensitivity of the liquid holdup in simulated pipelines to the different heat transfer calculation methods will be presented using a number of case studies with a range of burial depths in both subsea and onshore pipeline configurations. The relative merits of the heat...

... upstream oil & gas holdup variation single bend holdup bhr group 2016 production control configuration setup measurement bend fluid force multiphase 10 spectrum production logging Multiphase forces on bend structures- influence of upstream disturbance S P C Belfroid, E Nennie TNO...

... clusters of common modelling technology. The experimental pressure drops and liquid holdup were published by Lagiere et al. in 1984 on a total of 19 runs on a 361-km long subsea pipeline joining the, now decommissioned, North Sea offshore production platform of Frigg to the terminal at St Fergus...

... Abstract In this paper we perform a comprehensive analysis of two- and three-phase large scale experimental data from the SINTEF Multiphase Laboratory on low liquid loading flows. The experimental work was financed by Statoil (" Experiments for low liquid loading with liquid holdup...

... regimes can coexist in the pipe for extended time periods: one with a high holdup and one with a very low holdup. This is a critical matter for gas wells, because the discontinuous jump from low to high holdup marks the beginning of the end of the well's life (this phenomenon is sometimes referred...

... tomography (CT) system was utilised to measure holdups and phase distributions. The measurements from the X-ray CT system have been systematically analysed to illustrate how the oil viscosity impacts the flow characteristics, including axial and cross-sectional - particularly vertical- phase distribution...

.... For the DRA- study the test section was in all cases in a near horizontal position (-1o, 0o and +1o). Liquid holdups were measured using 2-energy, broad beam gamma densitometers, giving the time averaged water and oil holdups (cross-sectional phase fractions). 76 © BHR Group 2012 Multiphase 8 Figure 2...

..., commercial codes have been tested extensively for oil viscosities from 0.2 cP up to 20-50 cP, that is, condensate and light to medium oils. Large scale, high pressure data are not available for heavy oils. This means that there is a considerable uncertainty related to predictions of holdup, pressure drop...

... assumption for both pressure drop and liquid holdup in slugging systems, in favor of transient pressure drop and liquid holdup. Using fluid properties and flow parameters, we introduce an energy balance equation to update the temperature profile of the pipeline, accounting for the exothermic nature...

... reynolds number mixture velocity bypass pig pig velocity idelchik correlation bypass area holdup wall function liquid holdup production control pressure drop coefficient production monitoring simulation upstream oil & gas pipeline pigging bypass reservoir surveillance...

... are solved for each phase. In the oil and gas industry this model is reduced to 1D, and is commonly referred to as the "Mechanistic Model". slug production control interface slug flow slug frequency superficial velocity experiment lakehal production logging void fraction holdup production...

... In this study, the occurrence of multiple solutions in stratified flows was investigated. The model equations give multiple holdup solutions for certain flow regimes – in small angle upflows with low liquid velocity (low liquid loading) and with low to moderate gas velocity. We applied a steady...

... liquid velocity production monitoring holdup holdup solution slug flow hydrodynamic slug flow point model bhr group 2012 production control stratified region transition production logging pipeline transient behavior upstream oil & gas slip velocity slug catcher reservoir surveillance...

... oscillation mixture velocity experimental data multiphase 7 geometry flow rate liquid flow rate bhr group 2010 artificial intelligence slug frequency equation holdup gas flow rate terrain upstream oil & gas riser momentum balance inlet pressure sl 0 experiment Dynamic...

... experiments. Experimental flow regimes were determined using time series from a traversable gamma densitometer. Phase holdups were determined using either the traversable gamma densitometer or the stationary gamma densitometer. Pressure drops were measured using pressure transducers. regime...

... production control multiphase 7 slug holdup reservoir surveillance slug region bubble flow slug catcher transition nitrogen gas slug flow positive slope pipeline transient behavior danielson flow pattern map superficial velocity holdup drift-flux model bhr group 2010 slug body...

... of closure relationship uncertainties on multiphase flow model predictions. As a case study, we examined the impact of slug length uncertainty on pressure drop and liquid holdup predictions of Tulsa University Fluid Flow Projects (TUFFP) Unified Model(1) for two-phase vertical flows. The results suggest...