Artikel: CO₂–Brine Contact Angle Measurements on Navajo, Nugget, Bentheimer, Bandera Brown, Berea, and Mt. Simon Sandstones
Energy & fuels. 2020 Apr. 06, v. 34, no. 5
2020
Abstract: ... Nugget, Bentheimer, Bandera Brown, Berea, and Mt. Simon) that could potentially represent properties ...
| Abstract | In this study, contact angles were measured for CO₂ bubbles on six different sandstones (Navajo, Nugget, Bentheimer, Bandera Brown, Berea, and Mt. Simon) that could potentially represent properties of CO₂ storage depositional environments. The impacts of pressure and temperature were studied by focusing on the CO₂ phase behavior in three different scenarios: gaseous, liquid, and supercritical conditions. Despite controlling the sample preparation and cleanliness, CO₂–brine equilibration conditions, and pressure and temperature, there were inconsistencies in contact angle trends that could largely be attributed to natural sample heterogeneity resulting from localized variations in topography, surface roughness, and mineral composition across the surface. Despite these variations, the analysis of 298 measurements from this study showed that 81% of the contact angles were <40°, representing strongly water-wet to (moderately) water-wet behaviors. Also, 17.3% of the measurements were between 40° and 60° (weakly water-wet) and primarily belonged to small CO₂ bubbles (<500 μm) that were heavily impacted by localized surface heterogeneity in natural sandstone samples. In addition, only 1.7% of the measurements had angles greater than 60° and could be classified as no longer water-wet, but these measurements occurred on extremely small bubbles (100–200 μm) that were very dependent on localized surface heterogeneity. While some of the detailed physics of the CO₂/brine/sandstone interface is still poorly understood, from an application standpoint, the sandstones of this study were best characterized as strongly water-wet to (moderately) water-wet. |
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| Schlagwörter | carbon dioxide ; contact angle ; energy ; liquids ; mineral content ; sandstone ; surface roughness ; temperature ; topography |
| Sprache | Englisch |
| Erscheinungsverlauf | 2020-0406 |
| Umfang | p. 6085-6100. |
| Erscheinungsort | American Chemical Society |
| Dokumenttyp | Artikel |
| Anmerkung | NAL-AP-2-clean |
| ZDB-ID | 1483539-3 |
| ISSN | 1520-5029 ; 0887-0624 |
| ISSN (online) | 1520-5029 |
| ISSN | 0887-0624 |
| DOI | 10.1021/acs.energyfuels.0c00436 |
| Datenquelle | NAL Katalog (AGRICOLA) |
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