Influence of Gas Injection on the In-Situ Oil Fraction of an Oil-Water Flow in Horizontal Pipes

The experiments were conducted in a horizontal multiphase flow test loop (50mm inner diameter, 40m long) to investigate the flow of oil/water and the influence of an involved gas phase with low flow rate in horizontal pipes, specifically including oil/water flow patterns, cross-section water holdup and pipe flow pressure gradient. The experimental results indicated that the involved gas with low flow rate had a considerable effect on oil/water flow characteristics, which shows the complexity of gas/oil/water three-phase flow. Thus, this effect could not be ignored in design and operation management of oil/gas gathering and transportation system.

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Influence of gas injection on phase inversion in an oil–water flow through a vertical tube

International Journal of Multiphase Flow ◽

10.1016/j.ijmultiphaseflow.2005.10.006 ◽

2006 ◽

Vol 32 (3) ◽

pp. 311-322 ◽

Cited By ~ 21

Author(s):

M. Descamps ◽

R.V.A. Oliemans ◽

G. Ooms ◽

R.F. Mudde ◽

R. Kusters

Keyword(s):

Water Flow ◽

Phase Inversion ◽

Gas Injection ◽

Vertical Tube ◽

Flow Through ◽

Oil Water

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An Experimental Investigation of Oil-Water Flow Patterns in Horizontal Pipes

2004 International Pipeline Conference, Volumes 1, 2, and 3 ◽

10.1115/ipc2004-0625 ◽

2004 ◽

Author(s):

Hai-Yuan Yao ◽

Jing Gong

Keyword(s):

Experimental Data ◽

Water Flow ◽

Flow Patterns ◽

Critical Conditions ◽

New Classification ◽

Two Phase ◽

Factors Affecting ◽

Horizontal Pipes ◽

Transition Mechanism ◽

Oil Water

In this paper, an experimental research on the oil-water liquid-liquid two-phase flow patterns and their transitions in horizontal pipes are carried out. According to online oil-water flow structures and the analysis of pressure drop signals., different flow patterns are defined and distinguished. A new classification for oil-water flow patterns is proposed. The flow pattern maps are obtained from the experimental data, and the factors affecting the transition mechanism of different flow regimes are discussed. In addition, some semi-theoretical criteria for the transition between different flow patterns are proposed. Especially, an accurate model is developed to predict the critical conditions for phase inversion. Comparisons of the proposed criteria with other experimental data show reasonable agreements.

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Experimental Study of Oil-Water Flow in Inclined Pipes

Journal of Energy Resources Technology ◽

10.1115/1.3230815 ◽

1981 ◽

Vol 103 (1) ◽

pp. 56-66 ◽

Cited By ~ 15

Author(s):

H. Mukherjee ◽

J. P. Brill ◽

H. D. Beggs

Keyword(s):

Water Flow ◽

Phase Inversion ◽

Liquid Fraction ◽

Pressure Losses ◽

Inclination Angles ◽

Horizontal Pressure ◽

Oil Water ◽

Inclined Pipe ◽

Inclined Pipes

Pressure loss and water holdup data were measured for oil-water flow in 1.5-in-dia inclined pipe with inclination angles from ± 30 deg to ± 90 deg from horizontal. Pressure losses were higher than calculated with available techniques, with maximum values near the phase inversion. Effects of input liquid fraction and inclination angle on friction pressure gradient are presented. Water holdup correlations for predicting in-situ liquid fractions are given.

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Experimental Investigation on the Separation Performance for a New Oil-Water Separator

Frontiers in Energy Research ◽

10.3389/fenrg.2020.608586 ◽

2021 ◽

Vol 8 ◽

Author(s):

Min Zhan ◽

Wanyou Yang ◽

Fenghui Zhang ◽

Changhua Luo ◽

Huaxiao Wu ◽

...

Keyword(s):

Water Flow ◽

Flow Rate ◽

Separation Efficiency ◽

Water Flow Rate ◽

Operating Parameter ◽

Separation Performance ◽

Water Separation ◽

Split Ratio ◽

Oil Fraction ◽

Oil Water

To reduce the cost of oil exploitation, it is necessary to promote the development of cyclones for oil-water separation due to the increase of the water content in produced fluids. However, there are some limitations and disadvantages for the conventional separation device including bulky settling tanks and hydrocyclones. In this paper, a new axial inlet separator with two reverse flow outlets and a downstream flow outlet is introduced. In addition, an experimental system was designed and fabricated to investigate the effects of inlet flow rate, oil fraction, and a controlled split ratio on separation performance. The separator maintains high separation efficiency within the experimental range, namely water flow rate (4–7 m3/h), and oil fraction (1%–10%). Furthermore, the results show that a higher water flow rate and oil fraction will affect the separation efficiency. The change of a pressure drop in the separator was analyzed as well. Moreover, the controlled split ratio is a serious operating parameter, and a larger controlled split ratio is conducive to the separation performance.

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