Effect of nanofluid on CO2-wettability reversal of sandstone formation; implications for CO2 geo-storage
| Autor: | Mohammad Sarmadivaleh, Ali Saeedi, Zain-UL-Abedin Arain, Alireza Keshavarz, Muhammad Faraz Sahito, Muhammad Ali, Nilesh Kumar Jha, Stefan Iglauer, Shoaib Memon |
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| Rok vydání: | 2020 |
| Předmět: |
Hexanoic acid
chemistry.chemical_classification Molar concentration Chemistry Silicon dioxide Carboxylic acid 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Lauric acid 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Adsorption Nanofluid Chemical engineering Stearic acid 0210 nano-technology |
| Zdroj: | Journal of Colloid and Interface Science. 559:304-312 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2019.10.028 |
| Popis: | Hypothesis Nanofluid treatment is a promising technique which can be used for wettability reversal of CO2-brine-mineral systems towards a further favourable less CO2-wet state in the existence of organic acids. However, literature requires more information and study with respect to organic acids and nanoparticles’ effect at reservoir (high pressure and high temperature) conditions. Experiments Therefore, we have measured in this study that what influence small amounts of organic acids exposed to quartz for aging time of (7 days and 1 year) have on their wettability and how this impact can be reduced by using different concentrations of nanoparticles at reservoir conditions. Precisely, we have tested lignoceric acid (C24), stearic acid (C18), lauric acid (C12) and hexanoic acid (C6) at 10-2 Molarity, as well as, we have also used different concentrations (0.75 wt%, 0.25 wt%, 0.1 wt%, 0.05 wt%) of silica nanoparticles at realistic storage conditions. Findings The quartz surface turned significantly hydrophobic when exposed to organic acids for longer aging time of 1 year, and significantly hydrophilic after nanofluid treatment at optimum concentration of 0.1 wt%. It was observed that most nanoparticles were mechanistically irreversibly adsorbed on the surface of quartz sample. This wettability shift thus may increase CO2 storage capacities and containment security. |
| Databáze: | OpenAIRE |
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