... simple horizontal pipes carrying air and water at near atmospheric pressure and temperature. Then came larger, pressurised facilities using model hydrocarbon fluids. Now the oil industry has complex subsea production systems in deep water with reservoir fluids flowing over long distances and experiencing...

... is compared with downward flow in pipes. The comparison results show some differences between downward two-phase flow in annulus and pipes for the liquid holdup and flow regimes. This comparison shows a significant disagreement between flow in annulus and pipes for a wide range of conditions...

... series production logging void fraction characteristic flow structure production control flow pattern pipe liquid velocity annular flow upstream oil & gas gas velocity bhr group 2018 correlation reservoir surveillance shirazi liquid viscosity orientation flow regime Investigation...

... ABSTRACT Gas liquid slug flow can induce vibrations in process piping and large scale slugging can cause some oscillations of subsea flexible pipes. Pipe movements should be avoided, as fatigue can lead to pipe failure. Flow transients can also cause pipe failure, water slugs have lifted...

... ABSTRACT Experiments were performed with propose of mapping the flow patterns in two-phase flow in an upward inclinable 60 mm ID and 6 m long Plexiglas pipe. Air and viscous oil were used as working fluids and degree of inclination changed from 10 ? to 78 ?. Measurements includes pressure drop...

... liquid flow pipe onset velocity string production logging pressure gradient gas flow rate flow metering flow rate graph production control annular flow production monitoring bhr group 2018 upstream oil & gas eccentricity two-phase flow reservoir surveillance usl 10mm pressure...

... is based on the gas velocity being too low to lift droplets from the well. Several investigators have found that the droplet entrainment mechanism is wrong, and that the actual mechanism for wellbore load up is the reversal of the liquid film on the walls of the pipe. The film reversal point corresponds...

... ABSTRACT An experimental two-phase flow campaign with a viscous oil (100 cP) was conducted in the Large Scale 8" loop at the SINTEF Multiphase Flow Laboratory. The loop consisted of three main test sections, with pipe inclinations 0, 0.5 and 90 degrees, and with approximate lengths of 380 m...

... HT Hydrate formation equilibrium temperature [K] U Real velocity [m/s] z Pipe axial coordinate [m] Z Compressibility factor Greek letters Intermittence factor Pipe inclination [rad] H Hydration number Thermal scooping factor Viscosity [Pa.s] Density [kg/m3] Shear stress [Pa] Phase...

... Abstract This paper describes the design and development of a novel, non-invasive technique for measuring the mixture density of multiphase flows using the mechanical vibration characteristics of a pipe. The instrument comprises a flexible pipe section, a mechanical actuator with a driver unit...

... this is not the case. To give an example, the use of a radioactive source to measure the mixture density, requires a careful analysis of gamma ray attenuation through the pipe wall and the multiphase stream, introduces a number of potential errors and definitely represents a cumbersome device [1]. At the same time...

... traditionally encountered in relatively short length of pipes in offshore production operations. However with the growth of deep-water production, vertical down-comers from platforms to the seafloor may have lengths of several thousand feet. Accordingly, more accurate prediction of pressure drop and liquid...

... reservoir surveillance bhr group 2016 droplet dispersion conductance probe production control low mixture velocity multiphase 10 mixture velocity production monitoring upstream oil & gas oil layer production logging drop size flow develop pipe phase fraction evolution...

... carried out on relatively smaller pipes and for considerably less viscous fluids. This paper will be reporting the experimental campaign conducted in a 127mm (5 inches) internal diameter using 4.83cP silicone oil. upstream oil & gas artificial lift system liquid flow axial position...

... flow is characterized by a low density ratio and a viscosity ratio that can vary in many orders of magnitude (4). It is not only affected by inertia, viscous, pressure and interfacial forces, but also by the inclination and wetting characteristics of the pipe, the pre-wetting component...

... Abstract An experimental program for measuring the fraction of liquid entrained in the gas stream through a horizontal 3-inch pipe has been conducted. A customized test section was designed and fabricated for this testing, including an isokinetic sampling system designed for pressures up...

... the discontinuous onset of liquid accumulation (due to multiple holdup solutions) for large diameter pipes, which is a very important matter for many wet-gas transport systems. We demonstrate that the current data enables calculation of the interfacial friction factor with unprecedented accuracy for a wide range...

... Abstract An experimental study of vertical two-phase flow was conducted at the SINTEF Multiphase Laboratory using a 55 meter long 4" pipe at system pressures of 20, 45 and 70 bara. One of the main objectives of the campaign was to identify regions with multiple solutions, where two flow...

.... The available slug frequency models have all been developed for smaller diameter pipes. Comparison of model predictions for 6 in. ID pipe with the experimental results has shown that none of the existing slug frequency models could predict the experimental results with even moderate accuracy. The empirical...

... model discrepancy prediction upstream oil & gas production control entrainment fraction two-phase flow fluid dynamics bhr group 2016 pipe discrepancy Uncertainty analysis of multiphase flow Case studies from erosion, sand transport, liquid entrainment models W Dai, S Cremaschi...