Zero-Offset VSP Monitoring of CO2 Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site
Joint Authors
Götz, Julia
Lüth, Stefan
Krawczyk, Charlotte M.
Cosma, Calin
Source
International Journal of Geophysics
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-12-11
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
At the CO2 storage pilot site near the town of Ketzin (35 km west of Berlin, Germany) the sandstone reservoir at 630 m–650 m depth is thin and heterogeneous.
The time-lapse analysis of zero-offset VSP measurements shows that CO2-induced amplitude changes can be observed on near-well corridor stacks.
Further, we investigate whether CO2-induced amplitude changes in the monitoring data can be used to derive geometrical and petrophysical parameters governing the migration of CO2 within a brine saturated sandstone aquifer.
2D seismic-elastic modelling is done to test the processing workflow and to perform a wedge modelling study for estimation of the vertical expansion of the CO2 plume.
When using the NRMS error as a measure for the similarity between the modelled and recorded repeat traces, the best match is achieved for a plume thickness of 6-7 m within the reservoir sandstone of 8 m thickness.
With band limited impedance inversion a velocity reduction at the top of the reservoir of 30%, influenced by casing reverberations as well as CO2 injection, is found.
The relation of seismic amplitude to CO2 saturated layer thickness and CO2-induced changes in P-wave velocities are important parameters for the quantification of the injected CO2 volume.
American Psychological Association (APA)
Götz, Julia& Lüth, Stefan& Krawczyk, Charlotte M.& Cosma, Calin. 2014. Zero-Offset VSP Monitoring of CO2 Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site. International Journal of Geophysics،Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1036701
Modern Language Association (MLA)
Götz, Julia…[et al.]. Zero-Offset VSP Monitoring of CO2 Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site. International Journal of Geophysics No. 2014 (2014), pp.1-15.
https://search.emarefa.net/detail/BIM-1036701
American Medical Association (AMA)
Götz, Julia& Lüth, Stefan& Krawczyk, Charlotte M.& Cosma, Calin. Zero-Offset VSP Monitoring of CO2 Storage: Impedance Inversion and Wedge Modelling at the Ketzin Pilot Site. International Journal of Geophysics. 2014. Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-1036701
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1036701