Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant
We investigated oil recovery from porous rock using nanoscale colloidal dispersions, formed by adsorption of an anionic polymer [poly-(4styrenesulfonic acid-co-maleic acid); PSS-<i>co</i>-MA] and a zwitterionic surfactant [<i>N</i>-tetradecyl-<i>N</i>, <i>N&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/2/524 |
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| author | Han Am Son Taewoong Ahn |
| author_facet | Han Am Son Taewoong Ahn |
| author_sort | Han Am Son |
| collection | DOAJ |
| description | We investigated oil recovery from porous rock using nanoscale colloidal dispersions, formed by adsorption of an anionic polymer [poly-(4styrenesulfonic acid-co-maleic acid); PSS-<i>co</i>-MA] and a zwitterionic surfactant [<i>N</i>-tetradecyl-<i>N</i>, <i>N</i>-dimethyl-3-ammonio-1-propanesulfonate, TPS] onto silica nanoparticles. In an emulsion, colloidal dispersion enhanced the stability of the oil-water interface in the absence of particle aggregation; the hydrophobic alkyl chains of TPS shifted into the oil drop, not only physiochemically, stabilizing the oil-water interface, but also promoting repulsive particle-to-particle interaction. Core flooding experiments on residual oil saturation as a function of capillary number, at various injection rates and oil viscosities, showed that the residual oil level was reduced by almost half when the zwitterionic surfactant was present in the colloidal dispersion. Consequently, the result revealed that this colloidal dispersion at the interface provides a mechanically robust layer at the oil-water interface without particle aggregation. Thus, the dispersion readily entered the pore throat and adhered to the oil-water interface, lowering the interfacial tension and improving oil recovery. |
| first_indexed | 2024-03-09T05:44:52Z |
| format | Article |
| id | doaj.art-2f4e92d288bc40748db4c11be67d1507 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T05:44:52Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-2f4e92d288bc40748db4c11be67d15072023-12-03T12:22:11ZengMDPI AGApplied Sciences2076-34172021-01-0111252410.3390/app11020524Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic SurfactantHan Am Son0Taewoong Ahn1Department of Energy Resources Engineering, Pukyong National University, Busan 48547, KoreaPetroleum & Marine Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, KoreaWe investigated oil recovery from porous rock using nanoscale colloidal dispersions, formed by adsorption of an anionic polymer [poly-(4styrenesulfonic acid-co-maleic acid); PSS-<i>co</i>-MA] and a zwitterionic surfactant [<i>N</i>-tetradecyl-<i>N</i>, <i>N</i>-dimethyl-3-ammonio-1-propanesulfonate, TPS] onto silica nanoparticles. In an emulsion, colloidal dispersion enhanced the stability of the oil-water interface in the absence of particle aggregation; the hydrophobic alkyl chains of TPS shifted into the oil drop, not only physiochemically, stabilizing the oil-water interface, but also promoting repulsive particle-to-particle interaction. Core flooding experiments on residual oil saturation as a function of capillary number, at various injection rates and oil viscosities, showed that the residual oil level was reduced by almost half when the zwitterionic surfactant was present in the colloidal dispersion. Consequently, the result revealed that this colloidal dispersion at the interface provides a mechanically robust layer at the oil-water interface without particle aggregation. Thus, the dispersion readily entered the pore throat and adhered to the oil-water interface, lowering the interfacial tension and improving oil recovery.https://www.mdpi.com/2076-3417/11/2/524enhanced oil recoverysilica nanoparticlescapillary numberzwitterionic surfactant |
| spellingShingle | Han Am Son Taewoong Ahn Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant Applied Sciences enhanced oil recovery silica nanoparticles capillary number zwitterionic surfactant |
| title | Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant |
| title_full | Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant |
| title_fullStr | Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant |
| title_full_unstemmed | Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant |
| title_short | Effect of Capillary Number on the Residual Saturation of Colloidal Dispersions Stabilized by a Zwitterionic Surfactant |
| title_sort | effect of capillary number on the residual saturation of colloidal dispersions stabilized by a zwitterionic surfactant |
| topic | enhanced oil recovery silica nanoparticles capillary number zwitterionic surfactant |
| url | https://www.mdpi.com/2076-3417/11/2/524 |
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