Experimental study of nanoparticle size and material effect on the oil wettability characteristics of various rock types
The paper presents the results of systematic experimental studies of interfacial tension (IFT) and oil wettability of three different types of rock (dolomite, metabasalt, and sandstone) in nanosuspensions. Nanoparticles of silicon and aluminum oxides were used at the concentration ranged from 0.01 t...
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| Published in: | Journal of molecular liquids Vol. 327; p. 114906 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-04-2021
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | The paper presents the results of systematic experimental studies of interfacial tension (IFT) and oil wettability of three different types of rock (dolomite, metabasalt, and sandstone) in nanosuspensions. Nanoparticles of silicon and aluminum oxides were used at the concentration ranged from 0.01 to 1 wt%. It is shown that with increasing NP concentration, the contact angle of an oil droplet resting on a rock in a nanosuspension increases quite essentially (from 33 to 153°). The nanoparticle size and compositional effects on interfacial tension coefficient and contact angle (CA) within a wide range of particle concentrations were systematically studied for the first time. The contact angle oil/dolomite/nanofluid increased from 92 to 151° with decrease in the SiO2 nanoparticle size 50 nm to 5 nm. With an increase in the NP size from 5 to 50 nm, there was a decrease in interfacial tension of about 30%. The first-ever experiments were conducted to study the influence of nanoparticles in water on the oil wettability of various types of hydrophilic and hydrophobic rocks. It is shown that the wettability characteristics of various types of rocks can be controlled by adding minor amounts of nanoparticles of different sizes and compositions to influence the parameters that play a key role in the problems related to oil recovery enhancement during reservoir flooding.
•Interfacial tension and oil wettability of rock in nanosuspensions were obtained•With increasing NP concentration, interfacial tension of oil/nanosuspension decreases•As nanoparticle size increases, the contact angle increases•When increasing the NP size, the IFT of oil/nanosuspension decreases.•Effect of adding NPs on oil wettability significantly depends on the rock material. |
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| ISSN: | 0167-7322 1873-3166 |
| DOI: | 10.1016/j.molliq.2020.114906 |