Investigation on the mechanism of heating effect influencing emulsifying ability of crude oil: Experimental and molecular dynamics simulation

He, Meiming; Pu, Wanfen; Wu, Tong; Yang, Xuerui; Li, Xing; Li, Rui; Li, Siying; Chen, Yongqiang

doi:10.1016/j.colsurfa.2023.131654

Cited by 4 publications

(4 citation statements)

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“…High-purity kerosene was provided by the Chengdu Hongda Lube Oil Management Department. It had a purity of 99.9%, a density of 0.7980 g/cm 3 , and appeared as a colorless, transparent liquid with a slight odor. , …”

Section: Methodsmentioning

confidence: 99%

“…In experiments, organic solvents such as 1-methylnaphthalene, xylene, and toluene were commonly used to dissolve asphaltene. ,, Kerosene and n -alkanes were used as substitutes for saturated and aromatic hydrocarbons. ,, To prepare the base oil, kerosene and toluene were weighed at a mass ratio of 9:1. Then, the obtained asphaltene, resin, and wax, as detailed in Section 2.2 were added to the base oil to create three types of simulated oil.…”

Section: Methodsmentioning

confidence: 99%

“…The dispersion behavior of asphaltene can be characterized using conductivity measurements and micromorphology analysis. , In order to visualize the dispersion of asphaltene more directly, the morphology of asphaltene was observed using a DM2700RL/TL Leica microscope (Germany). In the experiment, the simulated oil samples were prepared with varying concentrations of asphaltene, resin, and wax.…”

Section: Methodsmentioning

confidence: 99%

“…It had a purity of 99.9%, a density of 0.7980 g/cm 3 , and appeared as a colorless, transparent liquid with a slight odor. 24,79 Separation of Crude Oil Components. The silica gel was placed in an SX-G18123 muffle furnace (China), activated at 110 °C for 10 h, and then placed in a drybox for use.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil

He,

Pu,

Yang

et al. 2024

Langmuir

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Nowadays, high-phase-inversion in situ emulsification technology has shown great potential in enhancing oil recovery from high-water-cut thin-oil reservoirs. However, emulsification characteristics, interfacial properties, and the mechanism of high phase inversion have not been systematically described. In this study, an emulsification experiment was conducted to investigate the effects of shear time, shear rate, and temperature on the phase inversion of thin oil. Furthermore, the influence of resin and wax on the dispersion of asphaltene was studied through microscopic morphology analysis. Interfacial tension measurement and interfacial viscoelasticity analysis were carried out to determine the interaction characteristics of asphaltene, resin, and wax at the interface. The results showed that, at 50 °C, the phase-inversion point of thin oil reached as high as 75%, and even at 60 °C, it remained at 70%. The shear time and shear rate did not affect the phase-inversion point of thin oil, while an increase in temperature led to a decrease in the phaseinversion point. Moreover, compared to the 20% phase-inversion point of base oil, the phase-inversion point increased with different proportions of asphaltene, resin, and wax. Particularly, at the ratio of asphaltene/resin/wax = 1:5:9, the phase-inversion point reached as high as 80%, indicating the optimal state. In this proportion, asphaltene aggregates exhibited the smallest and most uniform size, best dispersion, lower interfacial tension, and higher interfacial modulus. These findings provide reference and guidance for further enhancing oil recovery in medium-to-high-water-cut thin-oil reservoirs.

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Section: Methodsmentioning

confidence: 99%