Flow Characteristic of the Oilfield Heavy Crude Oil-Water Two Phase Flow

2010 ◽  
Author(s):  
Wei Wang ◽  
Jing Gong
Keyword(s):  
Crude Oil ◽  
Flow Characteristic ◽  
Two Phase Flow ◽  
Heavy Crude Oil ◽  
Phase Flow ◽  
Two Phase ◽  
Oil Water ◽  
Heavy Crude

Flow structure and pressure gradient of extra heavy crude oil-water two-phase flow

2017 ◽  
Vol 82 ◽  
pp. 174-181 ◽  
Author(s):  
Xiaoming Luo ◽  
Guobin Lü ◽  
Wei Zhang ◽  
Limin He ◽  
Yuling Lü
Keyword(s):  
Pressure Gradient ◽  
Crude Oil ◽  
Flow Structure ◽  
Two Phase Flow ◽  
Heavy Crude Oil ◽  
Phase Flow ◽  
Two Phase ◽  
Oil Water ◽  
Heavy Crude

Loss Coefficient for Viscous Mixtures of Light and Heavy Crude Oil in Y-Junctions

2016 ◽  
Author(s):  
Andres Piñero ◽  
Elionora Caldera ◽  
Manuel Borregales ◽  
Miguel Asuaje
Keyword(s):  
Crude Oil ◽  
Viscous Fluids ◽  
Energy Losses ◽  
Heavy Crude Oil ◽  
Oil Viscosity ◽  
Cfd Simulations ◽  
Two Phase ◽  
Oil Water ◽  
Heavy Crude ◽  
Water Cut

One of the challenges of transporting highly viscous crude oil is to ensure that the flow of oil will be delivered. It is also necessary to keep the operational standards and conditions along sections of pipes and fittings. Today, with low oil prices, it is important to minimize energy losses through the pipelines and accessories. However, new designs are often based on correlations that have not been developed for heavy oil water mixtures and are not frequently reported in the literature. Moreover, conventional calculations do not take into account the presence of accessory lines, or simply consider by empirically adding an extra percentage of energy loss or according to the engineer design test. Even more, the current correlations that could estimate accessory loss do not work well for viscous fluids and are even less suitable for the case of two-phase mixtures. For example, Gardel correlation [1] was made for water flow through yee type accessories. Applying this correlation to viscous fluids result in high deviations, more than 500% compared to CFD simulations. The present work attempts to predict the fluid dynamics behavior and the energy losses of these viscous fluids and mixtures (oil - water) going through a Yee type confluence. All simulations were carried out using ANSY CFX® v14.5. Mesh number of elements was optimized using Pipe-It® (optimization software). A grid independence study was also carried out automatically in Pipe-It® to ensure the quality of results. Several conditions have been simulated: angle confluence of 45°–75°, diameter ratio 2–7, oil viscosity from 10 to 105 cP, and water cut of 0–1. As the main result, a correlation that predicts the behavior of viscous mixtures in their passage through yee type confluences was developed using a genetic algorithms technique [2]. This correlation takes into account: viscosity, fluid fractions, input speeds, confluence angle and other parameters that are not normally considered by other authors. Therefore, it may be used in mixtures of water with light and heavy crude oil. Finally, correlations with 10% deviation compared to CFD simulations were obtained.

Numerical Simulation of Corrosion Inhibitor Transport in Pipelines Carrying Oil-Water Mixtures

2002 ◽  
Vol 124 (4) ◽  
pp. 239-245 ◽  
Author(s):  
Antonio Rojas-Figueroa ◽  
Yuri V. Fairuzov
Keyword(s):  
Crude Oil ◽  
Flow Model ◽  
Two Phase Flow ◽  
Fluid Model ◽  
Phase Flow ◽  
Water Mixture ◽  
Inhibitor Concentration ◽  
Two Phase ◽  
Injection Point ◽  
Oil Water

The transport of corrosion inhibitors in a pipeline carrying crude oil-water mixture has been studied using a transient liquid-liquid two-phase flow model. The fluid flow model (the hydrodynamic model) is based on a two-fluid model of two-phase flow. The model allows simulating the transfer of inhibitor from one phase to another (inhibitor partitioning) under steady-state and transient oil-water flow conditions. Both stratified and dispersed flow patterns can be modeled. Numerical simulations are presented to demonstrate the effects of topography of the line, locations of the inhibitor injection point, flow pattern, and partitioning of the inhibitor between the phases on the distribution of inhibitor concentration along the pipeline. The modeling can be used to predict the inhibitor volume needed to be injected (the dose rate) in order to provide the required inhibitor concentration in critical sections of crude-oil pipelines.

Numerical Simulation of Corrosion Inhibitor Transport in Pipelines Carrying Oil-Water Mixtures

2001 ◽  
Author(s):  
Antonio Rojas-Figueroa ◽  
Yuri V. Fairuzov
Keyword(s):  
Crude Oil ◽  
Flow Model ◽  
Two Phase Flow ◽  
Fluid Model ◽  
Phase Flow ◽  
Water Mixture ◽  
Inhibitor Concentration ◽  
Two Phase ◽  
Injection Point ◽  
Oil Water

Abstract The transport of corrosion inhibitors in a pipeline carrying crude oil-water mixture has been studied using a transient liquid-liquid two-phase flow model. The fluid flow model (the hydrodynamic model) is based on a two-fluid model of two-phase flow. The model allows simulating the transfer of inhibitor from one phase to another (inhibitor partitioning) under steady state and transient oil-water flow conditions. Both stratified and dispersed flow patterns can be modeled. Numerical simulations are presented to demonstrate the effects of topography of the line, locations of the inhibitor injection point, flow pattern, and partitioning of the inhibitor between the phases on the distribution of inhibitor concentration along the pipeline. The modeling can be used to predict the inhibitor volume needed to be injected (the dose rate) in order to provide the required inhibitor concentration in critical sections of crude-oil pipelines.

Pressure Drop and Water Holdup of Malaysian Crude Oil and Water Two-Phase Flow in Pipes

2014 ◽  
Vol 931-932 ◽  
pp. 1248-1252 ◽  
Author(s):  
Issham Ismail ◽  
Shahir Misnan ◽  
Ahmad Shamsul Izwan Ismail ◽  
Rahmat Mohsin
Keyword(s):  
Pressure Drop ◽  
Crude Oil ◽  
Two Phase Flow ◽  
Research Work ◽  
Complex Case ◽  
Phase Flow ◽  
Waxy Crude Oil ◽  
Two Phase ◽  
Waxy Crude ◽  
Oil Water

Understanding the pressure drop and water holdup of crude oil-water flow in a pipe is crucial to many engineering applications. Free water in contact with the pipes wall can cause erosion or corrosion problems. An experimental research was conducted at the Malaysia Petroleum Resources Corporation Institute for Oil and Gas, Universiti Teknologi Malaysia to study the pressure drop and water holdup of the Malaysian waxy crude oil-water flowing in a closed-loop system at ambient condition through a 5.08 cm ID stainless steel horizontal pipeline. In the research work, water cuts were varied from 0 - 90% with mixture velocities ranging from 0.1 0.8 m/s. The research works comprised fluid characterization, pressure drop, and liquid holdup measurement.The investigations proved that pressure drop increased with flow rates, while the water holdup was found to have decreased slightly at higher water cuts due to the presence of emulsion in the crude oil a challenge when using a waxy crude oil in a two phase flow system. The experimental results can be used as a platform to understand better a more complex case of liquid-liquid two phase flow.

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