Time-lapse sonic logs reveal patchy CO2 saturation in-situ
| dc.contributor.author | Caspari, Eva | |
| dc.contributor.author | Müller, T. | |
| dc.contributor.author | Gurevich, Boris | |
| dc.date.accessioned | 2017-01-30T12:23:08Z | |
| dc.date.available | 2017-01-30T12:23:08Z | |
| dc.date.created | 2012-02-26T20:00:45Z | |
| dc.date.issued | 2011 | |
| dc.identifier.citation | Caspari, E. and Müller, T.M. and Gurevich, B. 2011. Time-lapse sonic logs reveal patchy CO2 saturation in-situ. Geophysical Research Letters. 38 (L13301). | |
| dc.identifier.uri | http://hdl.handle.net/20.500.11937/21086 | |
| dc.identifier.doi | 10.1029/2011GL046959 | |
| dc.description.abstract |
Based on time-lapse sonic and neutron porosity logs from the Nagaoka CO2 sequestration experiment, a P-wave velocity-saturation relation at reservoir depth is retrieved. It does not coincide with either of the end-member models of uniform and patchy saturation but falls in between even if realistic error estimates for the host rock properties are considered. Assuming a random distribution of CO2 patches it is shown that the mechanism of wave-induced flow can be evoked to explain this velocity-saturation relation. Characteristic CO2 patch size estimates range from 1 to 5 mm. Such mesoscopic heterogeneity can be responsible for attenuation and dispersion in the well logging frequency band. | |
| dc.publisher | American Geophysical Union | |
| dc.title | Time-lapse sonic logs reveal patchy CO2 saturation in-situ | |
| dc.type | Journal Article | |
| dcterms.source.volume | 38 | |
| dcterms.source.number | L13301 | |
| dcterms.source.issn | 0094-8276 | |
| dcterms.source.title | Geophysical Research Letters | |
| curtin.note |
Copyright © 2011 The American Geophysical Union | |
| curtin.department | Department of Exploration Geophysics | |
| curtin.accessStatus | Open access |