The influence of backpressure on severe slugging in multiphase flow pipeline-riser systems

Xie, Chen; Guo, Liejin; Li, Wensheng; Zhou, Hongliang; Zou, Suifeng

doi:10.1016/j.ces.2017.01.028

Cited by 43 publications

(5 citation statements)

References 20 publications

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“…Yet, there are specific cases of gas-lift operations where detailed information about the structure of the flow inside production tubing; particularly the slug characteristics during tubing head choking, is essential (Barnea and Taitel, 1993). Xie et al (2017) observed devaluation of the slug region while increasing the backpressure while investigating slugging in multiphase flow. Reductions in pressure amplitude as well as the slug frequency, were also noticed.…”

Section: Introductionmentioning

confidence: 99%

Impact of surface choking on gas-lift stability and flow behaviour in oil producing wells

Chidamoio,

Akanji

2024

IJOGCT

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In this work, we investigate the effect of tubing head choking on gas-lift stability and flow regime transition in the vertically upward cylindrical pipe during gas-lift operation. For this purpose, a laboratory scale multiphase flow rig was designed, fabricated and assembled. lift gas injection rates of 1.13e −4 m 3 /s and 1.87e −4 m 3 /s were imposed in a 1 mm internal diameter (ID) single nozzle gas-lift injector connected to a rotameter and a liquid flow rate of 7.7e −6 m 3 /s was set in a speed potentiometer connected to a positive displacement gear pump. Tubing head choking is implemented by setting the system to 0% closed (fully opened) to partially closed -15%, 25% and 50% opened (85%, 75% and 50% choking). For each choking condition, the transient pressure at four measurement points located at length to diameter ratios L/D of 0.0;18.3;36.7, and 53.3 was recorded. Fluid flow structure and regime transition are distinguished and characterised based on the visual observations, photographic and slow motion videos, recorded for every single cycle of experiment run in the production test sections from L/D = 18.3 to L/D = 53.3. It was found that increasing the choke up to 85%, a transition from random peak-to-peak oscillation of pressure to a cyclic periodic oscillation is observed and this behaviour is accompanied with increase in pressure along the production tubing. The effect of topside choking on bubble size showed a drastic reduction of the size of the leading bubble as it flows upwardly with a maximum perimeter of 35.65 mm the flow is characterised by low vorticity and turbulence of the liquid film when the choke is increased up to 85%. Based on the experimental results, the topside coking technique as flow stabiliser during gas-lift operations has to be conjugated with knowledge and understanding of fluid flow structure transition along the production tubing

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Section: Introductionmentioning

confidence: 99%

Impact of surface choking on gas-lift stability and flow behaviour in oil producing wells

Chidamoio,

Akanji

2024

IJOGCT

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“…They tried to focus in the features of the gas-liquid two-phase flow in these systems. Xie et al [20] studied the influence of backpressure on severe slugging characteristics in a large flow loop with a total pipeline length of 405 m. Assari et al [21] utilized the mixture method to simulate the gasliquid two-phase flow inside an air-water ejector. Their results revealed a deviation of 7% between the simulation results and the existing empirical data.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Flow Characteristics of Gas-liquid Two-phase Flow in a Vertical Pipe with Downward Stream

Hasanpour

Mirzaee

Khalilian

2023

IJE

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“…In past decades, many researches on slug flow have been performed, and various models and empirical formulas have been proposed to calculate the characteristic parameters of slug flow (Xie et al 2017;Luo, 2007;Momen et al 2016), such as slug flow pressure gradients, slug gas fraction, and slug occurrence frequency. Based on the conservation laws of mass and momentum, Dukler and Hubbard (1975) proposed a model of slug flow in a horizontal pipe, which is capable of calculating the flow pressure drop and the average cross-section gas fraction.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Slug Flow Characteristics and its Suppression by Microbubbles in Gas-Liquid Mixture Pipeline

2021

JAFM

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In the oil-gas mixture transportation system of offshore oilfields, it is of great theoretical and practical significance to study the flow characteristics of the slug flow and its suppression or elimination. In this paper, the characteristics of the slug flow and microbubbles in a laboratory-scale rig are experimentally studied and analyzed by a multi-parameters measurement system including electrical resistance tomography (ERT), highspeed camera, and traditional pressure sensor. The suppression of the microbubbles on the slug flow formation is further investigated. Experimental results showed that the bubbles with different sizes from the microbubble generator have different aggregation and dispersion characteristics. The microbubbles can suppress the formation of the slug flow by increasing the liquid slug pressure and further affect the motion of the slug by enhancing the disturbance effect of the boundary layer, so as to achieve the suppression on slug flow.

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The influence of backpressure on severe slugging in multiphase flow pipeline-riser systems

Cited by 43 publications

References 20 publications

Impact of surface choking on gas-lift stability and flow behaviour in oil producing wells

Impact of surface choking on gas-lift stability and flow behaviour in oil producing wells

Numerical Analysis on Flow Characteristics of Gas-liquid Two-phase Flow in a Vertical Pipe with Downward Stream

Experimental Study on Slug Flow Characteristics and its Suppression by Microbubbles in Gas-Liquid Mixture Pipeline

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