scholarly journals Experimental Study of Flow Patterns and Pressure Drop Reduction in Pipes of Oil-Water Flow

2020 ◽  
Vol 43 (1) ◽  
pp. 18-30
Author(s):  
Ramadan Abd Elkhalek ◽  
Mohamed Awad ◽  
Lotfy Sakr
Keyword(s):  
Experimental Study ◽  
Pressure Drop ◽  
Water Flow ◽  
Flow Patterns ◽  
Oil Water

Investigation of Holdup and Pressure Drop Behavior for Oil-Water Flow in Vertical and Deviated Wells

1998 ◽  
Vol 120 (1) ◽  
pp. 8-14 ◽  
Author(s):  
J. G. Flores ◽  
C. Sarica ◽  
T. X. Chen ◽  
J. P. Brill
Keyword(s):  
Pressure Drop ◽  
Water Flow ◽  
Flow Patterns ◽  
Production Optimization ◽  
Pressure Gradients ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Inclination Angles ◽  
Oil Water

Two-phase flow of oil and water is commonly observed in wellbores, and its behavior under a wide range of flow conditions and inclination angles constitutes a relevant unresolved issue for the petroleum industry. Among the most significant applications of oil-water flow in wellbores are production optimization, production string selection, production logging interpretation, down-hole metering, and artificial lift design and modeling. In this study, oil-water flow in vertical and inclined pipes has been investigated theoretically and experimentally. The data are acquired in a transparent test section (0.0508 m i.d., 15.3 m long) using a mineral oil and water (ρo/ρw = 0.85, μo/μw = 20.0 & σo−w = 33.5 dyne/cm at 32.22°C). The tests covered inclination angles of 90, 75, 60, and 45 deg from horizontal. The holdup and pressure drop behaviors are strongly affected by oil-water flow patterns and inclination angle. Oil-water flows have been grouped into two major categories based on the status of the continuous phase, including water-dominated and oil-dominated flow patterns. Water-dominated flow patterns generally showed significant slippage, but relatively low frictional pressure gradients. In contrast, oil-dominated flow patterns showed negligible slippage, but significantly large frictional pressure gradients. A new mechanistic model is proposed to predict the water holdup in vertical wellbores based on a drift-flux approach. The drift flux model was found to be adequate to calculate the holdup for high slippage flow patterns. New closure relationships for the two-phase friction factor for oil-dominated and water-dominated flow patterns are also proposed.

Experimental Study for Characterization of Oil-Water Flow Patterns in Horizontal Pipes Based on Visualization and Pressure-Gradient Analysis

2020 ◽  
Author(s):  
Hermes Vazzoler Junior ◽  
Daiane Mieko Iceri ◽  
Juliana Cenzi ◽  
Carlos Keiichi Tanikawa da Silva ◽  
Charlie van der Geest ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pressure Gradient ◽  
Water Flow ◽  
Gradient Analysis ◽  
Flow Patterns ◽  
Horizontal Pipes ◽  
Oil Water

Viscous Oil-Water Flow in a Microchannel: Flow Patterns and Flow Development

2010 ◽  
Author(s):  
Hooman Foroughi ◽  
Masahiro Kawaji
Keyword(s):  
Water Flow ◽  
Silicone Oil ◽  
Flow Characteristics ◽  
Flow Patterns ◽  
Fused Silica ◽  
Water Mixture ◽  
Injection Point ◽  
Viscous Oil ◽  
Wide Range ◽  
Oil Water

The flow characteristics of a highly viscous oil and water mixture in a circular microchannel have been investigated. Water and silicone oil with a viscosity of 863 mPa.s were injected into a fused silica microchannel with a diameter of 250 μm. Before each experiment, the microchannel was initially saturated with either oil or water. In the initially oil-saturated case, different liquid-liquid flow patterns were observed and classified over a wide range of oil and water flow rates. As a special case, the flow of water at zero oil flow rate in a microchannel initially filled with silicone oil was also studied. When the microchannel was initially saturated with water, the oil formed a jet in water at the injection point but developed an instability at the oil-water interface downstream and eventually broke up into droplets.

Pressure Drop Measurements in Venturi Meters of Different Beta Ratios for Oil–Water Flow Experiments

2018 ◽  
Vol 43 (11) ◽  
pp. 6355-6374
Author(s):  
Mujahid O. Elobeid ◽  
Aftab Ahmad ◽  
Abdelsalam Al-Sarkhi ◽  
Luai M. Alhems ◽  
Syed M. Shaahid ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Water Flow ◽  
Oil Water ◽  
Flow Experiments

Uncertainty Analysis for the Measurement of Oil-Water Flow Parameters, Part II: Pressure Drop

2020 ◽  
Vol 15 (1) ◽  
pp. 1-7
Author(s):  
A. Abubakar
Keyword(s):  
Pressure Drop ◽  
Water Flow ◽  
Flow Rate ◽  
Tap Water ◽  
Standard Uncertainty ◽  
Water Volume ◽  
Water Mixture ◽  
Oil Water ◽  
Pressure Transmitter ◽  
Inclined Pipes

The need to ensure qualitative and reliable measurement of pressure drop of the oil-water flow cannot be over emphasized. In this regard, this study focused on the investigation of uncertainty in the measurement of pressure drop of oil-water flow in different acrylic pipe inclinations (0, +5ᴼ, +10ᴼ and -5ᴼ) and diameters (30.6-, 55.7- and 74.7-mm ID). The working fluids were tap water and mineral-based hydraulic oil (Shell Tellus S2 V 15), with medium viscosity and density of 24 cP and 872 kgm-3 respectively while the interfacial tension between the water and the oil was 12.9 mN/m at 25 ᴼC. The selected flow conditions were 0.5 and 1.0 m/s mixture velocities each at 0.1, 0.5 and 0.9 input water volume fractions. The repeatability, accuracy of the pressure transmitter, flow rate of the oil-water mixture and holdup (particularly for the inclined flow) were the sources of errors in the measurement of the pressure drop. The results showed that the average relative uncertainties in the pressure drop in 30.6-mm ID pipe were ±4.6 %, ±10.8 %, ±11.2 % and ±10.8 % in the 0ᴼ, +5ᴼ, +10ᴼ and -5ᴼ inclined flows respectively. Similarly, the average relative uncertainties in the pressure drop in the horizontal 55.7-mm and 74.7-mm ID pipes were ±5.7 % and ±7.5 % respectively. The largest contribution to the uncertainty in the pressure drop came from the flow rate and water holdup in the horizontal and inclined pipes respectively. The least contribution in both  horizontal and inclined pipes came from the accuracy of the pressure transmitter. Key words: Oil-water flow; Pressure drops; Standard uncertainty, Combined standard uncertainty; Expanded uncertainty

Horizontal oil-water flow in small diameter tubes. Pressure drop

1997 ◽  
Vol 24 (2) ◽  
pp. 231-239 ◽  
Author(s):  
A. Beretta ◽  
P. Ferrari ◽  
L. Galbiati ◽  
P.A. Andreini
Keyword(s):  
Pressure Drop ◽  
Water Flow ◽  
Small Diameter ◽  
Oil Water
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