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Keywords: pressure gradient
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Proceedings Papers
Experimental investigation of vertical downward two-phase flow in annulus
Available to PurchasePublisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-023
... 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...
Proceedings Papers
The effect of a surfactant on slugs in a flowline-riser system
Available to PurchasePublisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-085
... 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...
Proceedings Papers
Liquid loading in annuli, the effect of eccentricity
Available to PurchasePublisher: BHR Group
Paper presented at the 11th North American Conference on Multiphase Production Technology, June 6–8, 2018
Paper Number: BHR-2018-219
... 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...
Proceedings Papers
Churn-annular foam flow - experiments and modelling
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-087
... 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...
Proceedings Papers
Is it possible to reduce the cost (and increase the accuracy) of multiphase flow meters?
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-149
... 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...
Proceedings Papers
Modeling vertical flows in churn and annular flow regimes in small- and large-diameter pipes
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-191
... 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...
Proceedings Papers
Observations of sub-regimes in vertical annular flow
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-207
... 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...
Proceedings Papers
Effect of high oil viscosity on oil-gas flow behavior in vertical downward pipes
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-259
... 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...
Proceedings Papers
One-dimensional model of wet gas flow in near-horizontal pipes
Available to PurchasePublisher: BHR Group
Paper presented at the 10th North American Conference on Multiphase Technology, June 8–10, 2016
Paper Number: BHR-2016-447
... 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...
Proceedings Papers
Experiments on Gas Flow With Wet Pipe Walls
Available to PurchasePublisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-A3
... 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...
Proceedings Papers
Experiments and Modelling of Liquid Accumulation in the Low Elbow of a Gas/Liquid Pipeline
Available to PurchasePublisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-A4
... 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...
Proceedings Papers
A Study of Viscous Oil and Water Pipe Flow
Available to PurchasePublisher: BHR Group
Paper presented at the 9th North American Conference on Multiphase Technology, June 11–13, 2014
Paper Number: BHR-2014-E1
... 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...
Proceedings Papers
Oil And Water Droplet Entrainment In Horizontal Gas Liquid Flows
Available to PurchasePublisher: BHR Group
Paper presented at the 8th North American Conference on Multiphase Technology, June 20–22, 2012
Paper Number: BHR-2012-A013
... 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...