... and pressure gradient are the two main parameters for comparison. IFE's CO 2 flow loop, with an inner diameter (ID) of 44 mm, operates for two-phase flows over a large range of pressures and temperatures to cover the equilibrium line. A set of experiments was run to simulate similar conditions, according...

... pipes. The experimental data indicate that the holdup and pressure gradient is systematically higher for the 297 mm pipe, compared to the smaller diameters, when the total pressure gradient is gravitationally dominated. However, the total pressure gradient only changes approximately 25% for pipe...

.... The various experimental setups that are used and their outcome (trends and correlations) are described. In each project, a model was developed to predict the pressure gradient under foam flowing conditions. These models are discussed here and they are applied to representative well conditions. INTRODUCTION...

... flow production monitoring liquid holdup pressure gradient experiment bhr group 2015 oil viscosity pipe superficial velocity Abstract Viscous liquid-gas two-phase flow experiments with liquid viscosity ranging from 1000 – 5000 cP (1.0 – 5.0 Pa.s) and air as the gas phase were compared...

... et al. (5 Liquid holdup is observed to increase significantly when gas velocity is reduced below the critical gas velocity, which promotes intermittent flow and steeply increases the pressure loss. Due to the intermittent nature of the two-phase flow, the oscillations of pressure gradient and liquid...

.... The pipe inclination was gradually changed from 5 ° to +5 °. In-put water cuts from 0 % to 100 % were covered. The mixing velocity was varied from 0.1 to 1.0 Flow pattern maps, local phase fraction, and pressure gradient measurements are shown. Significant influence of the pipe inclination was found...

... Abstract This experimental investigation was conducted in horizontal and inclined acrylic pipe of 30.6-mm ID. The pressure gradients were determined in the dispersed flow regions with flow conditions of 0.8 – 1.6 m/s mixture velocities and 0.05 – 0.9 input oil volume fractions...

... measurements and high-speed photography in an effort to obtain a flow pattern map, pressure gradient profiles and measures of the in situ phase fractions. The experiments reveal a particular effect of the inlet configuration on the observed flow patterns. A horizontal plate, installed at the inlet, generates...

.... The performance of the numerical tools (OLGA code and CFD) is assessed against the experimental data and theory. The OLGA code is found to predict well the shut-in process, but over-predicts the restart time. NOMENCLATURE D the pipe diameter, m dP/dx pressure gradient, Pa/m g gravity, m/s2 h heat transfer...

... ABSTRACT The flow pattern dependant mechanistic formulations found in the scientific literature for modelling the pressure gradient and liquid content of gas and liquid flow in wells have evolved considerably in the past twenty five years. This paper tries to answer the question of how well...

.... Furthermore, experimental pressure gradients, average total liquid and water holdups, slug frequency and length data were compared with the commercial transient multiphase simulator, OLGATM, which shows a good match with high flow-rate conditions. The models validation study shows that the effect of water cut...

... Prediction of pressure gradient in dispersed liquid-liquid flows during phase inversion K H Ngan1, K Ioannou2, L D Rhyne2, P Angeli1 1 Department of Chemical Engineering, University College London, UK 2 Chevron Energy Technology Limited, USA Phase inversion was investigated during dispersed flow...

... included the pressure gradient along the pipe, holdups of oil and water, wetted wall fractions of oil and water, liquid film thicknesses of oil and water layers, and entrainments of oil and water in the gas phase. The trends of these investigated parameters versus the flow conditions were analyzed...

... testing flow pattern upstream oil & gas production monitoring bhr group 2009 production control drillstem testing pressure gradient transition annular flow imperial college flowrate void fraction steady state slug flow reservoir surveillance An experimental study of wellbore phase...

..., stratified-atomization, stratified-annular-transition and annular flow patterns. The proposed simplified dimensionless formula can be used for the flow line design purposes and flow assurance predictions in pipelines. pressure gradient two-phase flow multiphase production technology 14 production...

..., and flow regime under steady state and transient conditions will be demonstrated. upstream oil & gas liquid holdup pipeline bhr group 2007 flow regime ledaflow pressure drop multiphase production technology 13 pressure gradient production control conservation equation inclination...

... production technology 13 gas-condensate pipeline pressure gradient accumulation Liquid accumulation in gas-condensate pipelines an experimental study M Langsholt Institute for Energy Technology (IFE), Norway H Holm Norsk Hydro ASA, Norway ABSTRACT In slightly upwardly inclined pipes with low liquid...

... that the effective pipe flow diameter, as given by the hydraulic similarity transformation, compares well with the CFD simulations for favourable pressure gradients. Consequently, the pipe wall and interfacial friction also agree well. However, for adverse pressure gradients the Biberg model and the k -ω model show...

... monitoring phase inversion bhr group 2007 artificial lift system concentration air bubble pressure gradient multiphase production technology 13 Three-phase gas lift in the laboratory: air bubble injection into oil-water vertical pipe flow M N Descamps, R V A Oliemans, R F Mudde, G Ooms Multi-Scale...

... sand hold-up and flow rates, pressure gradient and the transient behavior of these parameters in straight inclined pipelines. Simulation results were in good quantitative agreement with available experimental data [2] as shown in [1]. In this paper, the single-phase model of Yang et al. [1] is extended...