View Item 

Cross-correlation time-lapse static corrections versus refraction static corrections on 4D land seismic CO2 monitoring

Access Status
Fulltext not available
Authors
Kashubin, A.
Bergmann, P.
Ivandic, M.
Juhlin, Christopher
Lüth, S.
Ivanova, A.
Lundberg, E.
Zhang, F.
Date
2013
Type
Conference Paper

Metadata
Show full item record
Citation
Kashubin, A. and Bergmann, P. and Ivandic, M. and Juhlin, C. and Lüth, S. and Ivanova, A. and Lundberg, E. et al. 2013. Cross-correlation time-lapse static corrections versus refraction static corrections on 4D land seismic CO2 monitoring, in Proceedings of the 75th EAGE Conference and Exhibition incorporating SPE EUROPEC 2013:, Jun 10-13 2013, pp. 2104-2108. London: European Association of Geoscientists & Engineers.
Source Title
75th European Association of Geoscientists and Engineers Conference and Exhibition 2013 Incorporating SPE EUROPEC 2013: Changing Frontiers
DOI
ISBN
School
Department of Exploration Geophysics
URI
Collection
Abstract

Difficulties encountered during the processing of the timelapse 3D land-seismic data at the CO2 geological storage site at Ketzin, Germany, were to a large extent attributed to changes in near-surface velocities. Two workflows for processing of the 4D data were tested. The first one included re-calculation of the refraction static corrections based on new information about the near-surface from first breaks. This workflow showed that the near-surface changes could only imperfectly be resolved by new refraction static corrections. The second workflow included cross-correlation of the traces acquired at the same locations but during different campaigns and calculation of the prestack time shifts between the surveys. Both workflows demonstrated their capability to minimize the time-lapse noise and enhance the time-lapse reservoir signature. They provide similar time-lapse results, except that the cross-correlation workflow is quicker, more accurate and displays less time-lapse noise.