... ABSTRACT This study presents experimental data for pressure gradient, liquid holdup, and flow regimes. To the knowledge of the authors, there are no studies in the literature on vertical downward two-phase flow in annulus. The experimental results for downward two-phase flow in the annulus...

... superficial liquid velocity fluid dynamics steady-state fully-developed model multiple solution region solution region gamma densitometer upstream oil & gas production control production monitoring accumulation gas rate bhr group 2018 simulation pipeline transient simulation liquid holdup...

... is the steady-state fully-developed flow version of OLGA, it is always assumed that the lowest liquid holdup solution is the correct solution. In this paper, OLGA-S will not refer to the commercial product, but to the physical model inside it. In the following, USG, USL, USH, USW are the superficial gas, liquid...

... 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...

... to that in the annular flow regime. This model is validated with field and laboratory experimental data from several different studies from the literature, in terms of pressure-gradient and liquid holdup results, for pipe diameters ranging from 0.0254 to 0.279 m (1 to 11 in). Other widely accepted models and commercial...

... 122 to 560 mPa s. The superficial gas and liquid velocities varied from 0.3 to 7 m/s and 0.05 to 0.7 m/s, respectively. Flow pattern, pressure gradient and liquid holdup data were acquired and compared with previous air-water experiments. Three different flow patterns have been identified based...

... 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...

... reservoir surveillance bhr group 2016 upstream oil & gas production monitoring pressure drop liquid holdup pipe production control flow rate interfacial friction factor new model usl transition multiple solution liquid loading holdup multiphase flow prediction Liquid loading...

... were carried out on a vertical pipe at NTNU Multiphase Flow Laboratory. The experiments were performed as a dry-up process, where an initial liquid film becomes thinner with time as it is removed by gas flow. Quick closing valves were used to measure the liquid holdup in the vertical section. Two data...

... of liquid. The maximum gas velocity at which liquid still remains in the V-section, as well as the liquid holdup and pressure gradient at these (critical) conditions were measured for several combinations of fluids and pipe inclination angles. The results were compared with the predictions of a mechanistic...

... and liquid velocities vary between 9.2 m/s ≤ V SG ≤ 15 m/s and m/s ≤ V SL ≤ 0.02 m/s, respectively, in horizontal pipe configuration. The time-averaged values of the liquid holdup obtained with the wire-mesh sensor are, in overall, good agreement with the measurements via the quick closing valves...

... university of tulsa liquid holdup velocity increase pipe film region upstream oil & gas oil viscosity increase production logging bhr group 2014 medium oil viscosity slug front liquid velocity superficial gas velocity reservoir surveillance Experimental study to characterize slug flow...

... 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...

... and liquid holdup predictions to slug length and liquid entrainment in gas core uncertainties is investigated for a multiphase fluid flow model, TUFFP Unified Model (1). The analysis shows that the Taylor series expansion consistently overestimates the output uncertainty for all cases when compared...

... simulations in order to see which of the solutions is likely to happen in reality. taitel bhr group 2012 production logging transient simulation water velocity reservoir surveillance closure experiment liquid velocity liquid holdup production monitoring holdup solution holdup transient...

.... liquid holdup dimensionless force pipe momentum change production monitoring reservoir surveillance experiment annular flow bhr group 2010 weber number slug flow multiphase 7 geometry production control riverin gas velocity flow regime sensor upstream oil & gas production logging...

... superficial gas velocity phase flow gamma densitometer flow regime bhr group 2010 production monitoring modeling & simulation point model pressure drop experimentally reservoir surveillance prediction olga water cut liquid holdup holdup experiment production logging production control...

... 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...