... with a one-dimensional multiphase flow simulator. The hydrate formation and particles size are handled with a Population Balance framework and a more classic framework. For simulations of hydrate-forming oil-dominated flows in an experimental flow loop, the hydrate cut, subcooling, slurry viscosity and water...

... ABSTRACT The Gannet oil export pipeline is operating at relatively low flow rates. At these low flow rates, there is potential to have a flow regime with laminar flow instead of with turbulent flow. Therefore, the viscosity, or rather the rheological properties, of this oil are essential...

... predict. The focus of the work was on gas dominated three-phase flows, with low liquid rates (USL=0.0001-0.1 m/s), and mainly high gas rates (USG=4-14 m/s). The effect of the water viscosity was investigated by mixing glycerol (70–74%) with the water, and conducting experiments at different temperatures...

... film. This wall film can have a profound effect on the hydraulic roughness experienced by the gas, and subsequently the frictional pressure drop. Furthermore, the data showed that this effect was particularly important for high liquid viscosities and in three-phase flows, and simulations showed...

...). Dispersion viscosities derived from pressure drop measurements increased with higher dispersed phase fraction. However, the relative increase in viscosity was considerably less for the condensate – MEG system when compared with the model system. For all systems, a peak value of the viscosity was reached...

... upstream oil & gas low liquid loading water fraction liquid film annular stratified flow pipe wall pressure drop annular flow equation multiphase production technology experiment international conference production logging production control liquid layer stratified layer viscosity...

... and environment hydS - heat of hydrate formation T - temperature eqT - equilibrium temperature t - time x - horizontal distance subT - subcooling v - velocity - shear rate - flowline inclination - base emulsion viscosity - mass density - two phase pressure drop correction factor hyd - volume fraction...

...Wall shear stress measurements of horizontal two-phase slug flow for high viscosity liquids using constant temperature anemometry L Buitrago, T Kim, E Pereyra, C Sarica The University of Tulsa, McDougall School of Petroleum Engineering, USA ABSTRACT In slug flow modelling, the shear stress between...

... viscosity gas well deliquification upstream oil & gas anionic surfactant production monitoring surfactant solution pressure gradient foam flow surfactant concentration surfactant diameter loop surface tension concentration foam The use of surfactants for gas well deliquification...

... Wall transform mechanism in a viscosity stratified turbulent flow S Ahmadi a,b, A Roccon a,b, F Zonta b, A Soldati a,b a Dipartimento Politecnico di Ingegneria e Architettura, Universitá di Udine, Italy b Institute of Fluid Mechanics and Heat Transfer, Technische Universität Wien, Austria ABSTRACT...

... and slug flow u Gas-liquid slip velocity [m/s] Liquid-gas density difference [kg/m3] Pipe angle [rad] µL Liquid viscosity [Pa s] Kinematic liquid viscosity [m2/s] G Gas density [kg/m 3] L Liquid density [kg/m 3] Gas-liquid surface tension [N/m] 1 INTRODUCTION This paper summarizes some...

... to steps (i), identification of input parameters with uncertainties, and (ii), definition of mathematical representations of uncertainties, suggested in the work of Cremaschi et al. (12). Commonly identified fluid input variables with uncertainties include fluid compositions, phase densities, viscosities...

... of the observed behaviour in the 4" vertical pipe, where the frictional pressure drop divided by that measured for two-phase gas-oil is plotted against the water cut and the liquid rate. These experiments and the associated measurements are described in more detail in the following sections. viscosity...

... to the viscous length scale in single phase flow. Both are based on the shear stress, but the viscous length scale of the liquid film is based on the viscosity and density of the liquid, so is typically much thicker than the viscous layer in single phase gas flow. The corresponding generic film roughness...

... viscosity between 69 and 160 mPa.s., tap water is used as the water phase. Both a fast response X- ray tomography system and different gamma densitometers were utilised to measure holdups and phase distributions. In this work, a detailed analysis of time series of measurement from these two types...

... resources located in Venezuela. Heavy oil production and transportation are especially difficult due to the high viscosities of this oil that increase the complexity of the multiphase flow involved. Traditionally, low/gas liquid ratios have been associated to heavy and extra heavy oil fields; however...

... oil superficial velocity production logging nominal oil viscosity mean liquid holdup production control artificial intelligence upstream oil & gas slug frequency reservoir surveillance prediction multiphase flow simulator viscosity gas superficial velocity flow pattern slug...

... Abstract This paper focuses on the problem of gellation, one of the key problems associated with the pipeline transportation of waxy crude oils. The impact of thermal cycling on the rheological properties, such as viscosity and yield stress, of waxy crude oils is investigated in detail...

... in the Valdemar field can be explained by operational differences or the only possible explanation is variations in wax content in the liquid produced by the various wells. oil viscosity flow rate deposition equation of state multiphase 17 bhr group 2015 viscosity sm 3 water cut fluid modeling...

... ABSTRACT Heavy oil transportation is especially difficult due to the high viscosities of the oil and the complexity of the multiphase flow involved. Asphaltenes and resins have the highest molecular weight of crude oil. This work investigates an experimental behavior of a potential transport...