dc.contributor.author | Iglauer, Stefan | eng |
dc.contributor.author | Fernø, Martin | eng |
dc.contributor.author | Shearing, Paul | eng |
dc.contributor.author | Blunt, Martin | eng |
dc.date.accessioned | 2015-04-21T09:13:51Z | |
dc.date.available | 2015-04-21T09:13:51Z | |
dc.date.issued | 2012-06-01 | eng |
dc.identifier.issn | 0021-9797 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/9824 | |
dc.description.abstract | We imaged an oil-wet sandstone at residual oil saturation (Sor) conditions using X-ray micro-tomography with a nominal voxel size of (9 μm)3 and monochromatic light from a synchrotron source. The sandstone was rendered oil-wet by ageing with a North Sea crude oil to represent a typical wettability encountered in hydrocarbon reservoirs. We measured a significantly lower Sor for the oil-wet core (18.8%) than for an analogue water-wet core (35%). We analysed the residual oil cluster size distribution and find consistency with percolation theory that predicts a power-law cluster size distribution. We measure a power-law exponent τ = 2.12 for the oil-wet core which is higher than τ for the water-wet system (τ = 2.05), indicating fewer large clusters in the oil-wet case. The clusters are rough and sheet-like consistent with connectivity established through layers in the pore space and occupancy of the smaller pores; in contrast the clusters for water-wet media occupy the centres of the larger pores. These results imply less trapping of oil, but with a greater surface area for dissolution. In carbon storage applications, this suggests that in CO2-wet systems, capillary trapping is less significant, but that there is a large surface area for dissolution and reaction. | en_US |
dc.language.iso | eng | eng |
dc.publisher | Elsevier | en_US |
dc.rights | Attribution-NonCommercial-NoDerivs CC BY-NC-ND | eng |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ | eng |
dc.subject | Residual trapping | eng |
dc.subject | Residual oil saturation | eng |
dc.subject | Oil-wet | eng |
dc.subject | X-ray micro-tomography | eng |
dc.title | Comparison of residual oil cluster size distribution, morphology and saturation in oil-wet and water-wet sandstone | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.date.updated | 2015-04-01T07:25:02Z | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2012 Elsevier Inc. | en_US |
dc.identifier.doi | https://doi.org/10.1016/j.jcis.2012.02.025 | |
dc.identifier.cristin | 928203 | |
dc.source.journal | Journal of Colloid and Interface Science | |
dc.source.40 | 375 | |
dc.source.14 | 1 | |
dc.source.pagenumber | 187-192 | |
dc.subject.nsi | VDP::Technology: 500::Rock and petroleum sciences: 510::Petroleum engineering: 512 | en_US |
dc.subject.nsi | VDP::Teknologi: 500::Berg- og petroleumsfag: 510::Petroleumsteknologi: 512 | nob |