Study on the Mechanism of Asphaltenes Reducing Oil-Water Interfacial Tension

2021 ◽  
Author(s):  
Yuwen Wang ◽  
Tiexin Cheng ◽  
Guangdong Zhou
Keyword(s):  
Interfacial Tension ◽  
Oil Water

scholarly journals Mechanism of active silica nanofluids based on interface-regulated effect during spontaneous imbibition

2021 ◽  
Author(s):  
Xu-Guang Song ◽  
Ming-Wei Zhao ◽  
Cai-Li Dai ◽  
Xin-Ke Wang ◽  
Wen-Jiao Lv
Keyword(s):  
Contact Angle ◽  
Interfacial Tension ◽  
Oil Recovery ◽  
Dynamic Contact Angle ◽  
Liquid Interface ◽  
Spontaneous Imbibition ◽  
Wettability Alteration ◽  
Low Permeability ◽  
Oil Water ◽  
Solid Liquid

AbstractThe ultra-low permeability reservoir is regarded as an important energy source for oil and gas resource development and is attracting more and more attention. In this work, the active silica nanofluids were prepared by modified active silica nanoparticles and surfactant BSSB-12. The dispersion stability tests showed that the hydraulic radius of nanofluids was 58.59 nm and the zeta potential was − 48.39 mV. The active nanofluids can simultaneously regulate liquid–liquid interface and solid–liquid interface. The nanofluids can reduce the oil/water interfacial tension (IFT) from 23.5 to 6.7 mN/m, and the oil/water/solid contact angle was altered from 42° to 145°. The spontaneous imbibition tests showed that the oil recovery of 0.1 wt% active nanofluids was 20.5% and 8.5% higher than that of 3 wt% NaCl solution and 0.1 wt% BSSB-12 solution. Finally, the effects of nanofluids on dynamic contact angle, dynamic interfacial tension and moduli were studied from the adsorption behavior of nanofluids at solid–liquid and liquid–liquid interface. The oil detaching and transporting are completed by synergistic effect of wettability alteration and interfacial tension reduction. The findings of this study can help in better understanding of active nanofluids for EOR in ultra-low permeability reservoirs.

scholarly journals Synthesis of aminated polystyrene and its self-assembly with nanoparticles at oil/water interface

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 317-327
Author(s):  
Chenliang Shi ◽  
Ling Lin ◽  
Yukun Yang ◽  
Wenjia Luo ◽  
Maoqing Deng ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Self Assembly ◽  
Carbon Dots ◽  
Chain Transfer ◽  
Functionalized Polymers ◽  
Amino Groups ◽  
One Dimensional ◽  
Reversible Addition ◽  
Oil Water ◽  
Chain Transfer Polymerization

AbstractThe influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.

Performance of alkali-free natural petroleum sulfonates: Ultra-low interfacial tension on oil/water interface

2015 ◽  
Vol 93 (8) ◽  
pp. 1410-1415 ◽  
Author(s):  
Zhan Weng ◽  
Peng-Yuan Zhang ◽  
Guang-Wen Chu ◽  
Wei Wang ◽  
Jimmy Yun ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Water Interface ◽  
Low Interfacial Tension ◽  
Oil Water

Dissipative particle dynamics study on the temperature dependent interfacial tension in surfactant-oil-water mixtures

2018 ◽  
Vol 169 ◽  
pp. 81-95 ◽  
Author(s):  
Shuyan Wang ◽  
Shanwen Yang ◽  
Ruichen Wang ◽  
Ruichao Tian ◽  
Xiaoyu Zhang ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Temperature Dependent ◽  
Oil Water

scholarly journals Anomalous system-size dependence of electrolytic cells with an electrified oil–water interface

2015 ◽  
Vol 17 (38) ◽  
pp. 25100-25108 ◽  
Author(s):  
Marise Westbroek ◽  
Niels Boon ◽  
René van Roij
Keyword(s):  
Interfacial Tension ◽  
Size Dependence ◽  
Storage Capacity ◽  
System Size ◽  
Double Layers ◽  
Water Interface ◽  
Dielectric Interface ◽  
Electrolytic Cells ◽  
Oil Water

Manipulation of the charge of the dielectric interface between two bulk liquids not only enables the adjustment of the interfacial tension, but also controls the storage capacity of ions in the ionic double layers adjacent to each side of the interface.

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