A model of wax deposition under oil-gas two-phase stratified flow in horizontal pipe

Duan, Jimiao; Li, Jiang; Liu, Huishu; Gu, Kecheng; Guan, Jinfa; Xu, Shuo; Gong, Jing

doi:10.2516/ogst/2018076

Cited by 9 publications

(8 citation statements)

References 17 publications

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“…It can be seen from Figure 10 that, the crystal structure of Akshabulak oil at 5°C without EVA is much larger than crystal structures of oil when we applied EVA and EVA-M. Moreover, Akshabulak oil at 5°C easily solidified without adding any additives due to formation of various shapes of wax depositions [25,26]. According to studies the morphology of the crystal structures of paraffins after the addition of modified EVA it should be concluded that the formation of plate-like structures is due to repellent of wax crystals by the polar acetate group in EVA copolymer that prevent the formation of large agglomerates of Table 7.…”

Section: Influence Of Modified Ppd On Transition Of Waxy Crude Oils Fmentioning

confidence: 96%

Study the rheological properties of waxy oil with modified pour point depressants for the South Turgai oil field in Kazakhstan

Kozhabekov

Zhubanov

Toktarbay

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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This work describes the performance of poly(ethylene-co-vinyl acetate) (EVA) copolymer and modified poly(ethylene-co-vinyl acetate) (EVA-M) as pour point reducer. Commercially available EVA copolymer modified with sodium hydroxide in methanol. Partially hydrolyzed EVA was obtained and Fourier Transform InfraRed (FTIR) analysis of the modified EVA was recorded. The modified and unmodified EVA was used to crude oil of South Turgai, Kazakhstan, in order to improve the flowability of the crude oil. According to the rheological behavior of oils in the South Turgai, the findings showed that modified EVA lowered the dynamic viscosity greater compared to unmodified EVA and heat treatment. Dynamic viscosities and yield points of different oils with various temperatures with using EVA and EVA-M were studied systematically. Finally microphotograph of crystal structures two oils with using EVA and EVA-M, under same conditions, were compared and discussed.

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Section: Influence Of Modified Ppd On Transition Of Waxy Crude Oils Fmentioning

confidence: 96%

Study the rheological properties of waxy oil with modified pour point depressants for the South Turgai oil field in Kazakhstan

Kozhabekov

Zhubanov

Toktarbay

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…According to the operating conditions (pressure, temperature, liquid and gas superficial velocities, pipe orientation, and fluid properties) [2], both phases will be distributed in a certain topology called flow pattern. The knowledge of the latter is required for a better estimation of the hydrodynamics, thermal properties [3], choice of models closures in transient multiphase flow simulation codes [4,5], as well as for the modeling of flow assurance phenomena such as wax deposition [6].…”

Section: Introductionmentioning

confidence: 99%

Onset of intermittent flow: Visualization of flow structures

Arabi

Salhi

Bouderbal

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The transition from stratified to intermittent air-water two-phase flow was investigated experimentally, by flow visualization and pressure drop signals analyses, in a 30 mm ID pipe. The intermittent flow’s onset was found to be mainly dependent on the liquid superficial velocity and the pipe diameter. Plug flow, Less Aerated Slug (LAS) or Highly Aerated Slug (HAS) flows could be obtained on the gas superficial velocity grounds. The available models, compared to experiments, could not predict adequately the intermittent flow onset. The appearance of liquid slugs was revealed by peaks in the pressure drop signal. Furthermore, it was shown that the available slug frequency correlations were not valid in the zone of the onset of intermittent flow.

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“…Duan et al [53] proposed a model for wax deposition in oilgas two-phase stratified flow in horizontal pipe. The geometry considered is three-dimensional.…”

Section: Introductionmentioning

confidence: 99%

Numerical Prediction of Deposition in Two-Phase Flow in Vertical Pipes

Li¹,

Yap²,

Goharzadeh³

et al. 2021

IJHT

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This article presents a model for particle deposition in two-phase flow in vertical pipes. There are three interacting modules in the model: Fluid Transport to predict velocity and pressure, Particle Transport to predict particle distribution and Particle Deposition to predict actual attachment of particles onto surfaces. Derivation of the governing equations is presented with the numerical solution procedure outlined. For verification, limiting cases with known solutions are considered. For validations, two-phase flows without deposition are considered. Upon verifications and validations, the model is employed to investigate particle deposition in two-phase flow with different flow patterns in both constant and variable cross section pipes, directly demonstrated the need to account for finite deposit thickness.

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A model of wax deposition under oil-gas two-phase stratified flow in horizontal pipe

Cited by 9 publications

References 17 publications

Study the rheological properties of waxy oil with modified pour point depressants for the South Turgai oil field in Kazakhstan

Study the rheological properties of waxy oil with modified pour point depressants for the South Turgai oil field in Kazakhstan

Onset of intermittent flow: Visualization of flow structures

Numerical Prediction of Deposition in Two-Phase Flow in Vertical Pipes

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