Co-adsorption behavior of aggregated asphaltenes and silica nanoparticles at oil/water interface and its effect on emulsion stability

Sun, Guangyu; Zhang, Hao; Liu, Dai-Wei; Li, Chuanxian; Yang, Fei; Yao, Bo; Duan, Ze; Chen, Xin-Ya; Sheng, Fu-Jun

doi:10.1016/j.petsci.2022.02.004

Cited by 15 publications

(6 citation statements)

References 49 publications

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“…It is mainly because the emulsified crude oil can disperse into smaller droplets, which can plug the narrow channels during flooding. As a result, the flooding system can achieve a larger microscopic sweep volume based on water flooding, leading to improved oil recovery. − To investigate the emulsification effect of the composite system consisting of BN and LSW on crude oil, emulsification experiments were carried out in four systems of the Mahu formation water, LSW, BN solution, and the BN–LSW composite system. The experiments were conducted at an experimental temperature of 34 °C with an oil–water ratio of 1:9.…”

Section: Resultsmentioning

confidence: 99%

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

et al. 2023

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Black nanosheets (BNs) and low-salinity water (LSW) flooding are two effective methods for improving oil recovery in low-permeability or ultra-low-permeability petroleum reservoirs. The former focuses on emulsification and interfacial tension reduction, while the latter focuses on wettability alteration. Combining BN with LSW is expected to achieve dual effects in oil recovery. However, there has been no research on the combination effect of BN and LSW on conglomerate reservoirs. Therefore, this study aims to investigate the oil imbibition mechanism of the BN–LSW composite system in the tight reservoir of Mahu Oilfield. The interfacial properties of the BN–LSW composite system were evaluated in terms of the oil–water interfacial tension, crude oil emulsification capability, and three-phase contact angle between oil, water, and rock. Through the imbibition experiment of the natural cores in Mahu Oilfield, the imbibition differences between single systems and the BN–LSW composite system were compared. The results showed that the BN–LSW composite system had minimal impact on the interfacial tension between oil and water compared to formation brine, LSW, and BN solution. However, the composite system demonstrated a significant emulsification effect with Mahu crude oil and alterated the wettability of the core. Compared to the single systems, the imbibition rate of the BN–LSW composite system was higher, resulting in an improved imbibition effect. The NMR T 2 signal explained the synergistic core imbibition effect of the BN–LSW composite system at the microscopic scale. The research outcomes of this study can provide a new approach for developing low-permeability and ultra-low-permeability reservoirs, holding practical value and reference significance.

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Section: Resultsmentioning

confidence: 99%

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

et al. 2023

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“…The angle (θ) of solid particles relative to 90° is a key indicator of the adsorption behavior of particles at the interface and their suitability as emulsion stabilizers, with a value closer to 90° indicating stronger adsorption behavior and favoring stability as an ideal emulsion stabilizer. Moreover, appropriate wettability can promote the adsorption of particles at the oil-water interface to form steric hindrance, effectively prevent droplet aggregation, and improve the stability of the emulsion [16] . The interfacial wettability of PP/CA complex was measured to investigate its potential as emulsion stabilizer.…”

Section: Interface Wettabilitymentioning

confidence: 99%

Dynamic high-pressure microjet combined with tyrosinase modify the complex system of pea protein and chlorogenic acid

Li,

Ni,

Guo

et al. 2024

Preprint

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At present, the phenomenon of polyphenol substances represented by chlorogenic acid combined with pea protein to form food processing raw materials is increasingly common in the food processing industry. The purpose of this study is to modify pea protein (PP)/chlorogenic acid (CA) composite solution by DHPM and tyrosinase (Tyr) in order to further obtain better properties, so as to solve the problem of limited application of natural pea protein. And, the influences of Tyr and DHPM on the structure and functional properties of PP/CA complex under different treatment conditions, and the mechanism and effect of Tyr's influence in the PP/CA binary system were performed. The results showed that compared with PP/CA liquid phase without Tyr and DHPM treatment, for PP/CA treated with Tyr and DHPM, the color changed less, the cross-linking effect was the best, and the structure of the composite liquid was stable. DHPM decreased the emulsifying activity of protein, while Tyr significantly increased the emulsifying activity. The microstructure, secondary structure and tertiary structure of the modified protein were changed. The microstructure showed a relatively complete sheet, and the hydrogen bond interaction was enhanced. The content of sulfhydryl group was significantly reduced by 21.14%, and the content of disulfide bond was significantly increased by 13.40%. This study provides a thought for PP modification. Theoretically, it can be applied to the preparation of emulsions and the inclusion of functional substances. A theoretical basis for the development of high-value protein products.

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“…The mixing and stirring of the oil phase and water phase ( i.e., providing mixing energy ) is one of the necessary conditions for emulsion formation [33] . In the stirring process, the oil phase undergoes deformation and elongation and breaks into smaller oil droplets that ultimately coalesce to form an emulsion [34] . The change curves of emulsion conductivity over time at different stirring speeds were fitted to Equation (3).…”

Section: Figure 14 Microscopic Images Of Heavy Oil Emulsions At Diffe...mentioning

confidence: 99%

Study on the Kinetics of Formation Process of Emulsion of Heavy Oil and Its Functional Group Components

Liu,

Sun,

Lun

et al. 2024

Preprint

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The key to the cold recovery technology of heavy oil is the efficient emulsification and viscosity reduction of heavy oil under formation conditions. The dynamic model of heavy oil emulsification process was established by conductivity method for the first time. The change in water phase conductivity during emulsification conforms to the second-order rate equation. In addition, an investigation was conducted on the effects of functional group composition, emulsifier concentration, temperature, pH and stirring speed on the emulsification rate of heavy oil. The results show that the conductivity method effectively evaluates the emulsification rate. Acidic and amphoteric fractions exhibit higher interfacial activity, larger emulsification rate constant and faster emulsification rate. With the increase of emulsifier concentration, the emulsification rate constant first rose and reached its maximum value at a concentration of 0.05 mol/L before decreasing. The activation energy of the emulsification process is 40.282 kJ /mol, and increasing temperature benefits the emulsification rate. Higher pH levels and stirring speed indicate a faster emulsification rate. The study of dynamics law provides theoretical guidance for an in-depth understanding of the mechanism and application of cold recovery technology for heavy oil.

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Co-adsorption behavior of aggregated asphaltenes and silica nanoparticles at oil/water interface and its effect on emulsion stability

Cited by 15 publications

References 49 publications

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

Black Nanosheet-Enhanced Low-Salinity Water System for Improving Oil Recovery in a Low-Permeability Conglomerate Reservoir

Dynamic high-pressure microjet combined with tyrosinase modify the complex system of pea protein and chlorogenic acid

Study on the Kinetics of Formation Process of Emulsion of Heavy Oil and Its Functional Group Components

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