The effect of gas-wetting nano-particle on the fluid flowing behavior in porous media

Jin, Jiafeng, Wang, Yanling , Nguyen, Tuan A. H., Nguyen, Anh V., Wei, Mingzhen and Bai, Baojun (2017) The effect of gas-wetting nano-particle on the fluid flowing behavior in porous media. Fuel, 196 431-441. doi:10.1016/j.fuel.2017.01.083

Author Jin, Jiafeng
Wang, Yanling
Nguyen, Tuan A. H.
Nguyen, Anh V.
Wei, Mingzhen
Bai, Baojun
Title The effect of gas-wetting nano-particle on the fluid flowing behavior in porous media
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
Publication date 2017-05-15
Sub-type Article (original research)
DOI 10.1016/j.fuel.2017.01.083
Open Access Status Not yet assessed
Volume 196
Start page 431
End page 441
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Subject 1500 Chemical Engineering
2103 Fuel Technology
2102 Energy Engineering and Power Technology
1605 Organic Chemistry
Abstract The effect of gas-wetting on the liquid-blocking effect near a wellbore region is significant. Here, we functionally modified nano-silica particles with a size of approximately 40 nm each by using a fluorosurfactant and obtained a super gas-wetting nano-silica particles, which could improve the contact angles of brine and hexadecane from 23° and 0° to 152° and 140°, respectively, and decrease the surface free energy of rock surface from 72 to 1.6 mN/m. The decrease in the gas displacement was approximately 30%. FT-IR, SEM and EDS were employed to determine the morphological change in the rock surface before and after gas-wetting alteration. Results indicate that when the fluorosurfactant molecules are joined to the nano-silica surface, and C[sbnd]F bond is recognized. The grape-like particles forming a multi-adsorption on the rock surface, which play an important role in super gas-wetting by decreasing surface free energy and increasing roughness on the rock surface. The data of EDS was consistent with the results of FT-IR and SEM. To further understand the influence of gas-wetting alteration on the flow and distribution of fluids in porous media, visualization flooding was conducted. The results show that the initial liquid saturation in the micromodel decreased sharply from 33.23% to 20.77% after the gas-wetting treatment, and the contact angle of isolated brine droplet on the treated pore-wall was approximately 125°, which also verifies that pore wettability can be altered to gas-wetting. The analytical data of the oil displacement experiment demonstrates that the substantial decrease in oil saturation may contributes to enhancing oil recovery. Furthermore, the mobility of oil trapped in micro channels can also be enhanced significantly after gas-wetting alteration due to the presence of methane.
Keyword Functional modification
Grape-like particle
Super gas-wetting
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 201506450043
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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