scholarly journals Numerical Simulation of Oil-Water Flow Velocity Field and Flow Pattern in Horizontal Wells and Near Horizontal Wells

2021 ◽  
Vol 2068 (1) ◽  
pp. 012008
Author(s):  
Yingying Ma ◽  
Hongwei Song ◽  
Changqi Zhao ◽  
Ran Wei ◽  
Lihuizi Sun
Keyword(s):  
Velocity Field ◽  
Flow Velocity ◽  
Flow Pattern ◽  
Water Flow ◽  
Flow Rate ◽  
Horizontal Wells ◽  
Total Flow ◽  
Deviation Angle ◽  
Oil Water ◽  
Water Cut

Abstract Oil-water flow widely exists in oilfield development. Due to the gravity differentiation, the oil-water flow in low-flow horizontal wells has a clear characteristics of stratified flow. With the increase of flow rate, the stratified characteristics are not obvious, which leads to the difficulty of multiphase flow phase separation flow interpretation in oilfield. In this paper, the oil-water flow in horizontal wells is taken as the research object. The VOF model of Fluent software is used to study the relationship between velocity field and flow pattern distribution characteristics with water cut, well deviation angle and total flow. The results show that with the increase of water cut, the oil-water separation level gradually moves up, and the velocity of water phase is greater than that of oil phase. When the well deviation angle changes slightly, the flow stratification of oil-water changes sharply, and the flow velocity in the pipeline also changes. When the total flow rate is lower than 200 m3/d, the oil-water phases have obvious stratified flow characteristics. With the increase of flow rate, the oil-water interface fluctuates. The average velocity of oil and water is not much different.

Water cut measurement of oil–water flow in vertical well by combining total flow rate and the response of a conductance probe

2015 ◽  
Vol 26 (9) ◽  
pp. 095306 ◽  
Author(s):  
Jianjun Chen ◽  
Lijun Xu ◽  
Zhang Cao ◽  
Wen Zhang ◽  
Xingbin Liu ◽  
...  
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Total Flow ◽  
Total Flow Rate ◽  
Vertical Well ◽  
Conductance Probe ◽  
Oil Water ◽  
Water Cut

scholarly journals Partial phase flow rate measurements for stratified oil-water flow in horizontal wells

2020 ◽  
Vol 47 (3) ◽  
pp. 613-622
Author(s):  
Hongwei SONG ◽  
Haimin GUO ◽  
Shuai GUO ◽  
Hangyu SHI
Keyword(s):  
Water Flow ◽  
Flow Rate ◽  
Horizontal Wells ◽  
Phase Flow ◽  
Partial Phase ◽  
Oil Water

Identification of Wake Convection and Flow Outline in the Interface Region of Blade Rows With Axial Gap in a Counter Rotating Turbine

2019 ◽  
Author(s):  
Rayapati Subbarao ◽  
M. Govardhan
Keyword(s):  
Flow Pattern ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Three Dimensional ◽  
Interface Region ◽  
Turbine Stage ◽  
Deviation Angle ◽  
Flow Rates ◽  
Improved Performance

Abstract In a Counter Rotating Turbine (CRT), the stationary nozzle is trailed by two rotors that rotate in the opposite direction to each other. Flow in a CRT stage is multifaceted and more three dimensional, especially, in the gap between nozzle and rotor 1 as well as rotor 1 and rotor 2. By varying this gap between the blade rows, the flow and wake pattern can be changed favorably and may lead to improved performance. Present work analyzes the aspect of change in flow field through the interface, especially the wake pattern and deviation in flow with change in spacing. The components of turbine stage are modeled for different gaps between the components using ANSYS® ICEM CFD 14.0. Normalized flow rates ranging from 0.091 to 0.137 are used. The 15, 30, 50 and 70% of the average axial chords are taken as axial gaps in the present analysis. CFX 14.0 is used for simulation. At nozzle inlet, stagnation pressure boundary condition is used. At the turbine stage or rotor 2 outlet, mass flow rate is specified. Pressure distribution contours at the outlets of the blade rows describe the flow pattern clearly in the interface region. Wake strength at nozzle outlet is more for the lowest gap. At rotor 1 outlet, it is less for x/a = 0.3 and increases with gap. Incidence angles at the inlets of rotors are less for the smaller gaps. Deviation angle at the outlet of rotor 1 is also considered, as rotor 1-rotor 2 interaction is more significant in CRT. Deviation angle at rotor 1 outlet is minimum for this gap. Also, for the intermediate mass flow rate of 0.108, x/a = 0.3 is giving more stage performance. This suggests that at certain axial gap, there is better wake convection and flow outline, when compared to other gap cases. Further, it is identified that for the axial gap of x/a = 0.3 and the mean mass flow rate of 0.108, the performance of CRT is maximum. It is clear that the flow pattern at the interface is changing the incidence and deviation with change in axial gap and flow rate. This study is useful for the gas turbine community to identify the flow rates and gaps at which any CRT stage would perform better.

scholarly journals A Novel Combined Conductance Sensor for Water Cut Measurement of Low-Velocity Oil-Water Flow in Horizontal and Slightly Inclined Pipes

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 182734-182757
Author(s):  
Weihang Kong ◽  
He Li ◽  
Guanglong Xing ◽  
Lingfu Kong ◽  
Lei Li ◽  
...  
Keyword(s):  
Water Flow ◽  
Low Velocity ◽  
Oil Water ◽  
Water Cut ◽  
Inclined Pipes

Investigation of the Flow Pattern Transition Behaviors of Viscous Oil–Water Flow in Horizontal Pipes

2020 ◽  
Vol 59 (47) ◽  
pp. 20892-20902
Author(s):  
Haili Hu ◽  
Jiaqiang Jing ◽  
Sara Vahaji ◽  
Jiatong Tan ◽  
Jiyuan Tu
Keyword(s):  
Flow Pattern ◽  
Water Flow ◽  
Horizontal Pipes ◽  
Viscous Oil ◽  
Flow Pattern Transition ◽  
Oil Water

The effects of viscosity, surface tension, and flow rate on gasoil-water flow pattern in microchannels

2013 ◽  
Vol 30 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Rahman Sadeghi Boogar ◽  
Reza Gheshlaghi ◽  
Mahmood Akhavan Mahdavi
Keyword(s):  
Surface Tension ◽  
Flow Pattern ◽  
Water Flow ◽  
Flow Rate

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

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