Analisis of Oil-Water Flow Tests in Horizontal, Hilly-Terrain, and Vertical Pipes

Abduvayt, Plat; Manabe, Ryo; Watanabe, Tomoko; Arihara, Norio

doi:10.2118/90096-ms

Cited by 13 publications

(2 citation statements)

References 5 publications

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“…(Average pressure gradient measured for water at q : 0°, l w : 1 is 37 Pa/m) 3.3 Frictional pressure drop and the mixture velocity at θ = +5° and λ w = 0.9 6 shows, increment of frictional pressure drop with increment of mixture velocities. Lum et al [5], Abduvayt et al [8] and Kumara et al [7] also report the same trend. For higher watercut cases as λ w = 0.9, the flow is water dominant.…”

Section: Water Hold-upmentioning

confidence: 59%

Characterization of oil–water plug related flow in slightly inclined pipes

Perera¹,

Mylvaganam²,

Time³

2017

Int. J. CMEM

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Flow patterns in oil-water carrying pipes vary due to the flow characteristics, fluid properties and pipe inclination. For inclined pipes, the gravity component along the pipe influences the flow patterns. Plug flow (PF) is one special flow pattern that occurs in slightly upward inclined pipelines. Mineral oil-Exxsol D60 (viscosity = 1.6 mPa.s, density =788 kg/m 3) and water (viscosity = 1mPa.s, density = 997 kg/m 3) were used as test-fluids. A test matrix was carried out to determine the possible flow patterns that occur at upward pipe inclinations +1° , +3° , +5° and +6° for low mixture velocities (0.2-0.5 m/s), and at water-cut 0.9. The plug flow regime was found only for +5° and +6° inclinations, while no plug flow was noticed at +1° and +3° inclinations. Plug flow was found only for lower flow velocity and higher water-cuts. Plug flow patterns were identified both through visual observation and by means of high-speed video imaging. Two new flow patterns 'oil droplet clusters in continuous oil and water (OC/O&W)' and 'distinct oil droplet clusters in water (D-OC/W)' were introduced, and they occur around the plug flow regime. High-speed images were post-processed for determination of the oil-water interface and subsequently used to calculate the water holdup. The time averaged water hold up decreased with increasing mixture velocity due to the decrease of oil-water slip as a result of increased degree of dispersion. The oil plugs entrained more droplets as mixture velocity was increased, leading to high-frequency fluctuations of volume fraction of the oil plugs. Holdup increased with increasing inclination due to the onset of plug flow, which leads to increased slip. The pressure drop over the test section was measured, and the frictional pressure drops were calculated using average water holdup values. The frictional pressure drop increased with increasing mixture velocity, due to increased mixing and subsequent increase of effective viscosity. The frictional pressure drop decreased with increased inclination due to the appearing of oil plugs and the drag reduction effect associated with the plug flow.

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Section: Water Hold-upmentioning

confidence: 59%

Characterization of oil–water plug related flow in slightly inclined pipes

Perera¹,

Mylvaganam²,

Time³

2017

Int. J. CMEM

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show abstract

“…Several authors have reported the effect of pipe inclination angles on flow patterns [2,[43][44][45], pressure drop [44,46,47], liquid holdup [43,44,[46][47][48][49], drop velocity [48], drag-reducing polymers [50], and HTCs [41,51,52] in two-phase oil-water flows. Boostani et al carried out an experimental investigation and artificial neural network (ANN) model to resolve the HTC, and flow pattern for oil-water flows in inclined and horizontal pipes.…”

Section: Introductionmentioning

confidence: 99%