Multiphase Pipeline Flows in Hydrocarbon Recovery

Valle, Arne

doi:10.1615/multscientechn.v10.i1.10

Cited by 16 publications

(12 citation statements)

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“…At low mixture velocities (U m =0.50 m/s) the flow is stratified even at low water cuts, and therefore no initial fall in pressure drop is observed. other and with the oil-water interface (Valle, 1998). Hence, the dispersions are unstable and a drag reduction effect can be expected particularly in the oil-continuous dispersions (Pal, 1993;Hardin, 1995).…”

Section: Effects Of Changes Of Pipe Inclination At Mixture Velocity 1mentioning

confidence: 99%

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Kumara¹,

Halvorsen²,

Melaaen³

2009

Meas. Sci. Technol.

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Abstract. Oil-water flow in horizontal and slightly inclined pipes was investigated. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The experiments were conducted in a 15 m long, 56 mm diameter, inclinable steel pipe using Exxsol D60 oil (density of 790 kg/m 3 and viscosity of 1.64 mPa s) and water (density of 996 kg/m 3 and viscosity of 1.00 mPa s) as test fluids. The test pipe inclination was changed in the range from 5° upward to 5° downward. Mixture velocity and inlet water cut varies up to 1.50 m/s and 0.975, respectively. The time averaged cross sectional distributions of oil and water were measured with a single-beam gamma densitometer. The pressure drop along the test section of the pipe was also measured. The characterization of flow patterns and identification of their boundaries are achieved via visual observations and by analysis of local water volume fraction measurements. The observed flow patterns were presented in terms of flow pattern maps for different pipe inclinations. In inclined flows dispersions appear at lower mixture velocities compared to the horizontal flows. Smoothly stratified flows observed in the horizontal pipe disappeared in upwardly inclined pipes and new flow patterns, plug flow and stratified wavy flow were observed. The water-inoil dispersed flow regime slightly shrinks as the pipe inclination increases. In inclined flows the dispersed oil-in-water flow regime extended to lower mixture velocities and lower inlet water cuts. The present experimental data were compared with results of a flow pattern dependent prediction model, which uses the area averaged steady state two-fluid model for stratified flow and the homogeneous model for dispersed flow. The two-fluid model was able to predict the pressure drop and water hold-up for stratified flow. The homogeneous model was not able to predict the pressure profile of dispersed oil-water flow at higher water cuts. The two-fluid model and homogeneous model over-predicts the pressure drop for dual continuous flow.

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Section: Effects Of Changes Of Pipe Inclination At Mixture Velocity 1mentioning

confidence: 99%

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Kumara¹,

Halvorsen²,

Melaaen³

2009

Meas. Sci. Technol.

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“…The models available to predict pressure drop and holdup in liquid-liquid systems are the empirical (based on the LockhartMartinelli parameters X and X and X Φ, modifi ed for oil-water systems), two-fl uid and homogeneous ones (Valle, 1998). Alkaya (2000) evaluated these three models for low inclination systems using experimental pressure gradient data at ±1° and ±5° from the horizontal.…”

Section: Modelingmentioning

confidence: 99%

Low Inclination Oil‐water Flows

2004

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“…Utvik et al (1998) reported a shift in the phase inversion point from 40-50% at low gas fractions, to up to 95% for very high gas fractions. Valle (1998) suggested that gas bubbles would inhibit the coalescence of oil drops at very high gas fractions (where the gas aeration is enhanced), therefore increasing the value of water fraction that would lead to inversion of the liquid/liquid mixture. This was also found to be true by Odozi (2000), who curve-fitted his experimental data with the following expression:…”

Section: Model For Determination Of Phase Inversion and Liquid-liquidmentioning

confidence: 99%

On the simulation of three-phase slug flow in nearly horizontal pipes using the multi-fluid model

Bonizzi

Issa

2003

International Journal of Multiphase Flow

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Multiphase Pipeline Flows in Hydrocarbon Recovery

Cited by 16 publications

References 0 publications

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Pressure drop, flow pattern and local water volume fraction measurements of oil–water flow in pipes

Low Inclination Oil‐water Flows

On the simulation of three-phase slug flow in nearly horizontal pipes using the multi-fluid model

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