... 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...

... production control pressure gradient effective concentration concentration upstream oil & gas reservoir surveillance superficial liquid velocity effective surfactant concentration surfactant riser base surfactant concentration slug flowline superficial gas velocity bhr group 2018...

... and pressure gradients. The results show that an increase in the eccentricity is triggering liquid loading already at larger gas flow rates. Pressure gradients seem to be affected most when gap bridging by waves is occurring. 2 INTRODUCTION Liquid loading is a well-known problem that occurs when wet gas...

... and the pressure gradient (the TPC is the integrated pressure gradient over the well). Multiple models for predicting these flows have been developed and reported, using the data from these studies. In recent years, several experimental studies have been conducted to assess the effect of surfactants (i.e. foamers...

... in this work has been the development of two distinct correlations: the first regards the vertical pressure gradient, represented as a simple function of the liquid hold-up and the mixture velocity. The second expresses the pressure drop through the multiphase orifice as a function of the mixture density...

... 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...

... Abstract Pressure gradients of concurrent upward air-water flow have been measured in a 25.4mm internal diameter vertical test section over a range of superficial air and liquid velocities. Several sub-regimes of annular flow (pulse/disturbance wave, ripple wave, partial wetting, and rivulet...

... 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...

... upstream oil & gas film distribution equation liquid film distribution simulator production control pressure gradient droplet pipe bottom production monitoring reservoir surveillance One-dimensional model of wet gas flow in near-horizontal pipes M Bonizzi TEA Sistemi, Italy P Andreussi...

... sets using Air-Water and Air-Mineral oil were obtained. A significant increase on pressure drop with small amounts of the liquid holdup was observed. Pressure gradient and holdup behavior were reproduced quite well by commercial flow simulators but the flushing time showed discrepancies. 1...

... 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...

... monitoring flow regime pipe flow pressure gradient experiment stratified flow production control dispersion water-in-oil emulsion water cut production logging concentration viscosity crude oil viscous oil bhr group 2014 emulsion viscosity shear stress A study of viscous oil and water pipe...

... experimental data available for three phase flow is scarce. The present experiments focus in three phase flow at elevated gas densities. There are several methods proposed to calculate the pressure gradient for stratified wavy flow with droplets entrainment. Some of them are based on a simplified approach were...