Article
Energy & Fuels
Hongying Li, Chaohui Chen, Qian Huang, Yifei Ding, Yu Zhuang, Yiwei Xie, Miaomiao Xu, Shanpeng Han, Jinjun Zhang
Summary: Treatment with pour point depressant (PPD) can reduce the impedance changes caused by wax precipitation, making waxy crude oil easier to transport. Addition of PPD leads to increased capacitance and decreased resistance of wax particles, with a positive correlation between the viscosity reduction and the decrease in resistance. This study provides new insights into the functional mechanism of PPD in improving the flowability of waxy crude oil.
Article
Engineering, Petroleum
Biswadeep Pal, Tarun Naiya
Summary: This research article explores the application of shikakai fruit extract as a novel bio-additive to enhance the flow properties of waxy crude oil, resulting in reduced pumping costs during pipeline transportation. The addition of the bio-additive decreased the pour point and viscosity of the crude oil significantly, making it easier to flow through pipelines. Additionally, the study found that wax deposition was significantly reduced after the addition of the bio-additive, making it a cost-effective solution for flow assurance of waxy crude oil at low temperatures.
Article
Energy & Fuels
Qian Huang, Hongying Li, Yu Zhuang, Yifei Ding, Chenbo Ma, Chaohui Chen, Yiwei Xie, Huaqing Liang, Shanpeng Han, Jinjun Zhang
Summary: The application of an electric field perpendicular to the flow direction can achieve viscosity reduction in waxy crude oil, similar to that obtained with an electric field parallel to the flow direction. Additionally, higher electric field strength and lower oil temperature result in more significant viscosity reduction, with viscosity recovering gradually after the electric field is removed.
Article
Energy & Fuels
Chaoyue Zhang, Jinjun Zhang, Jiabao Kang, Yiwei Xie, Shanpeng Han, Hongying Li
Summary: Electrical treatment is an emerging method to improve the cold flowability of waxy crude oil. This study investigates the effect of AC electric fields on the oil's viscosity and yield stress. The results show that AC electric fields can also improve the cold flowability, but to a lesser extent compared to DC fields. The frequency and waveform of the AC field have an impact on its electrorheological effect.
Article
Energy & Fuels
Mohammad Madani, Mostafa Keshavarz Moraveji, Mohammad Sharifi
Summary: Intelligent models were developed using least squares support vector machine and three algorithms to predict the apparent viscosity of waxy crude oils doped with polymeric additives. The experimental results showed a high correlation between the predicted values and laboratory data.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Jiaqiang Jing, Wen Shi, Qi Wang, Bangliang Zhang
Summary: This study investigates the viscosity-reduction mechanism of high-paraffin petroleum under low-intensity and long-term magnetic stirring. The research finds that magnetic orientation and disaggregation of wax crystals are the microscopic mechanism of magnetization, which can reduce viscosity. This study lays the theoretical foundation for the technical application of magnetic technology in petroleum transportation.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Chemistry, Multidisciplinary
Jinfa Zhang, Yingzhu Guan, Ting Li, Guojun Yin
Summary: The solubility of CO2 in water-bearing crude oil is crucial for crude oil reserves calculation and the development of CO2-related technologies. This study investigated the dissolution characteristics of CO2 in water-bearing crude oil under different temperature and pressure conditions, and proposed a new solubility prediction model. The results showed that temperature and pressure had significant effects on the solubility of CO2 in water-bearing crude oil, and the newly established prediction model exhibited high accuracy.
Article
Engineering, Chemical
Ehsan Ghanaei
Summary: This research demonstrates the different rheological behaviors of waxy crude oils and condensates at different temperatures and the significant influence of temperature variation on their rheological properties. A viscosity model based on Particle Swarm Optimization (PSO) method is obtained to predict the viscosity in both Newtonian and non-Newtonian regions.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Basem Elarbe, Ibrahim Elganidi, Norida Ridzuan, Kamal Yusoh, Norhayati Abdullah, Shamala Vijayakumar
Summary: In this study, a novel PPD, SA-co-BA, was synthesized and evaluated for its performance on Malaysian crude oil. The results showed that the 1:1 mass ratio had the best pour point depression effect and wax inhibition efficiency, leading to a significant improvement in flowability of the crude oil.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ashraf M. Ashmawy, Bo Yao, Manal G. Mohamed, El-Sayed M. Elnaggar, Salah M. El-Bahy, Mohamed F. Hamam
Summary: The use of flow improvers or pour point depressants in crude oil pretreatment is widely accepted due to its simplicity and cost-effectiveness. New compounds were prepared and tested as flow improvers for Qarun crude oil, with one copolymer showing the highest efficiency in improving the flow properties.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Ana M. Sousa, Tiago P. Ribeiro, Maria J. Pereira, Henrique A. Matos
Summary: In the oil and gas industry, wax formation and deposition are common problems. This study modeled the phase behavior of 17 crude oils from a Brazilian oil field using Multiflash software. By adding methane, carbon dioxide, or fatty acid as inhibitors, the study found a reduction in wax precipitation tendency. Myristic acid was the most effective in reducing the wax appearance temperature, with results being less pressure dependent compared to methane and carbon dioxide.
Article
Energy & Fuels
Weiqiang Wang, Yang He, Bo Wang, Mei Dong, Haijuan Zhang, Chen Shen
Summary: This study investigated the influence of microbial wax removal and viscosity reduction technologies on the fluidity of waxy crude oil. The H-1 strain (Ochrobactrum intermedium) was proposed from in situ soil and used for the experiment. The biosurfactants produced by strain H-1 showed good oil displacement and emulsification capabilities, leading to a reduction in wax content and viscosity of the waxy crude oil. The results demonstrated that strain H-1 can degrade wax components, lower viscosity, and improve low-temperature fluidity of waxy crude oil.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Petroleum
Biswadeep Pal, Tarun Kumar Naiya, Gautam Sarkhel
Summary: This paper focuses on the application of a natural extract from Amla fruit in Indian waxy crude oil to improve flow behavior and wax deposition rate. The result shows that the Amla extract is more effective compared to commercial additives and is more environmentally friendly.
Article
Energy & Fuels
Hong-Ying Li, Qing-Bo Xie, Hao Sun, Wei Guo, Feng Yan, Qing Miao, Chao-Fei Nie, Yu Zhuang, Qian Huang, Jin-Jun Zhang
Summary: The yielding behaviors of waxy crude oil are investigated under different applied stresses, revealing a close relationship between creep process, stress, and time. Based on fractional calculus theory and damage theory, a nonlinear creep model is proposed to accurately describe the yielding process of waxy crude oil.
Article
Agriculture, Multidisciplinary
Jue Wang, Yuxiang Mao, Tianqi Huang, Weiping Lu, Dalei Lu
Summary: This study found that drought or waterlogging during grain formation stage exacerbated the detrimental effects of high temperature on the starch physicochemical properties of waxy maize.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2021)
