scholarly journals Wax deposition modeling of oil/water stratified channel flow

AIChE Journal ◽  
2010 ◽  
Vol 57 (4) ◽  
pp. 841-851 ◽  
Author(s):  
Zhenyu Huang ◽  
Michael Senra ◽  
Ravi Kapoor ◽  
H. Scott Fogler
Keyword(s):  
Channel Flow ◽  
Wax Deposition ◽  
Deposition Modeling ◽  
Oil Water

Study and Evaluation of Changqing Crude Oil Antiwaxing Agent

2019 ◽  
Vol 953 ◽  
pp. 166-171 ◽  
Author(s):  
Qing Mei Luo ◽  
Jian Yang ◽  
Li Jun She ◽  
Wen Jie Wan ◽  
Yun Ma ◽  
...  
Keyword(s):  
Crude Oil ◽  
Removal Rate ◽  
Salt Content ◽  
Water Interface ◽  
Wax Deposition ◽  
Wetting Ability ◽  
Deposit Surface ◽  
Low Salt ◽  
Oil Water ◽  
Wax Removal

In order to solve the problems of wax deposit, this study evaluated the effect of wax cleaning agent used in Changqing and adjusted its formulation. The results showed that the wax removal rate of oil based dewaxing agent was slightly higher than that of emulsion dewaxing agent for crude oil with low salt content. It is possible that the emulsion dewaxing agent contains a certain amount of mutual solvents, which improves its wetting ability at the oil-water interface and makes the oil and water dissolve each other. So that the wax deposit surface from hydrophilic hydrophobic to hydrophilic hydrophobic, forming anti-wax film to prevent wax deposition. Therefore, the wax removal ability of 1#, 3# oil wax is higher than that of oil base wax dewaxing agent.

Effects of the Dispersed Phase on Oil/Water Wax Deposition

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Pengyu Wang ◽  
Wei Wang ◽  
Jing Gong ◽  
Yuanxin Zhou ◽  
Wei Yang
Keyword(s):  
Particle Size ◽  
Crude Oil ◽  
Dispersed Phase ◽  
Wax Deposition ◽  
Waxy Crude Oil ◽  
Water Emulsion ◽  
Oil Emulsion ◽  
Wax Content ◽  
Oil Water ◽  
Water Cut

In the study of the foundation of the oil / water wax deposition experiment, the emulsification characteristics of crude oil emulsion with high wax content have gradually become the hot research area. In the current research of emulsification characteristics of oil/water emulsion, the attention has been focused on the study of the effects of water cut, stirring speed, particle size distribution on the viscosity of waxy crude oil emulsion in the experiment, in which heavy oil and simulated oil are adopted as the working fluids. In this study, the emulsion with different water cut and stirred by different speed was prepared under three different temperature conditions, the temperature above the wax appearance temperature (WAT), near the WAT, and below the WAT. The polarization microscope and rotary viscometer were applied to measure the effects of the particle size of the dispersed phase and waxy crystal distribution on the oil/water emulsion viscosity. The results suggest that preparing the temperature for crude oil emulsion with high wax content has an important influence on the emulsion microstructure. This study lays the foundation for further study of oil/water two phase dynamic wax deposition experiments.

Wax deposition modeling of oil/gas stratified smooth pipe flow

AIChE Journal ◽  
2016 ◽  
Vol 62 (7) ◽  
pp. 2550-2562 ◽  
Author(s):  
Jimiao Duan ◽  
Huishu Liu ◽  
Jinfa Guan ◽  
Weixing Hua ◽  
Guangwei Jiao ◽  
...  
Keyword(s):  
Pipe Flow ◽  
Wax Deposition ◽  
Deposition Modeling ◽  
Smooth Pipe ◽  
Oil Gas

Wax Deposition Modeling with Considerations of Non-Newtonian Characteristics: Application on Field-Scale Pipeline

2017 ◽  
Vol 31 (5) ◽  
pp. 5011-5023 ◽  
Author(s):  
Sheng Zheng ◽  
Mohamed Saidoun ◽  
Thierry Palermo ◽  
Khalid Mateen ◽  
H. Scott Fogler
Keyword(s):  
Field Scale ◽  
Wax Deposition ◽  
Deposition Modeling

Effect of Emulsified Water Droplet on Wax Deposition Path in Multiphase Transportation Pipeline

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Yi Zhao ◽  
Xiangdong Qi ◽  
Zhihua Wang ◽  
Kegang Ling ◽  
Zhenhua Rui
Keyword(s):  
Mechanistic Model ◽  
Polarized Light ◽  
Water Droplets ◽  
Wax Deposition ◽  
Inversion Point ◽  
Two Phase ◽  
Oil Water ◽  
Emulsified Water ◽  
Pipeline Wall ◽  
Wax Crystals

Abstract Although the problems of wax deposition in multiphase transportation pipelines have been addressed and wax deposition models have been developed in recent years, the complex wax deposition paths derived from the potential variety of flow regimes in multiphase flow have not been well understood. This study presented a method for characterizing wax crystals aggregation and developed a model for describing the wax deposition path in oil−water two-phase flows. The effect of the emulsified water droplets on wax crystals aggregation in shearing flows was identified using the polarized light microscopy and image analysis method. The role of the emulsified water droplets in the wax deposition path reaching the upper side and lower side of the pipeline wall was discussed by solving the developed model which involves the possible inclination angle of the multiphase transportation pipeline. The availability of the mechanistic model was validated by the data and knowledge in the existing literature. The results indicated that the circular degree and particle size of wax crystals showed a characteristic that it first increased and then decreased with the accumulation of emulsified water droplets in shearing flow, and this transition appeared to the phase inversion point of the oil−water two-phase. The wax deposition path was complex in multiphase transportation. The velocity for wax crystals depositing to the pipeline wall decreased, and the time for wax crystals depositing to the pipeline wall extended with the existence of emulsified water droplets. This behavior became remarkable when the dispersion stability of the oil−water two-phase enhanced.

The Role of Emulsified Water in the Wax Deposition Path of a Waxy Crude Oil Multiphase Transportation Pipeline

2019 ◽  
Author(s):  
Xinyu Lin ◽  
Zhihua Wang ◽  
Qingshan Feng ◽  
Lei Zhang ◽  
Yunfei Xu
Keyword(s):  
Crude Oil ◽  
Water Droplets ◽  
Wax Deposition ◽  
Waxy Crude Oil ◽  
Two Phase ◽  
Waxy Crude ◽  
Oil Water ◽  
Emulsified Water ◽  
Pipeline Wall ◽  
Wax Crystals

Abstract Although the problem of wax deposition in multiphase transportation pipelines have been addressed and some related wax deposition models have been developed in recent years, the complex wax deposition paths derived from the potential variety of flow regimes in multiphase flow have not been well understood. This study presented a method for characterizing wax crystals aggregation behavior and developed a model for describing wax deposition path in oil/water two-phase flows. The impact of the emulsified water droplets on wax crystals aggregation in shearing flows was quantified using polarized light microscopy and image analysis method. The role of the emulsified water droplets in the wax deposition path reaching the upper side and lower side of pipeline wall was discussed by solving the developed model which involves the possible inclination angle of multiphase transportation pipeline. The availability of the mechanistic model was validated by the data and knowledge in the existing literature. The results indicated that wax crystals morphologies and structures tended to be regular with the enhancement of shearing effect, and their aggregation behavior were restrained. The circular degree and particle size of wax crystals showed a characteristic that it firstly increased and then decreased with the accumulation of emulsified water droplets in shearing flow, and this transition appeared to the phase inversion point of the oil/water two-phase. The velocity for wax crystals depositing to pipeline wall decreased and the time for wax crystals depositing to pipeline wall extended with the existence of emulsified water droplets. The wax deposition path became more complex in multiphase transportation, and such effect became remarkable when the dispersity of oil/water two-phase enhanced. Accordingly, the intractable wax deposition of waxy crude oil in cold environment transportation would be mitigated to some extent. This study contributes to comprehending the distinction of wax deposition mechanism in single-phase and multiphase transportation of waxy crude oil, and the proposed method and model are valuable for further predicting wax deposition in waxy crude oil emulsions pipelines. The findings in this study also point out an approach to conducting cost-effective flow assurance operations in crude oil production and transportation.

scholarly journals Pipeline wax deposition modeling: A sensitivity study on two commercial software

Petroleum ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 206-213 ◽  
Author(s):  
Giancarlo Giacchetta ◽  
Barbara Marchetti ◽  
Mariella Leporini ◽  
Alessandro Terenzi ◽  
Davide Dall’Acqua ◽  
...  
Keyword(s):  
Sensitivity Study ◽  
Wax Deposition ◽  
Commercial Software ◽  
Deposition Modeling

Wax Deposition Modeling with Considerations of Non-Newtonian Fluid Characteristics

2016 ◽  
Author(s):  
Sheng Zheng ◽  
Mohamed Saidoun ◽  
Khalid Mateen ◽  
Thierry Palermo ◽  
Yiyu Ren ◽  
...  
Keyword(s):  
Newtonian Fluid ◽  
Wax Deposition ◽  
Deposition Modeling ◽  
Fluid Characteristics
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