Beckwith, JA and Clark, R (2015) Estimating frequency-dependent attenuation quality factors in pre-stack surface seismic data. In: Schneider, RV, (ed.) SEG Technical Program Expanded Abstracts 2015. 2015 Society of Exploration Geophysicists Annual Meeting, 18-23 Oct 2015, New Orleans, USA. Society of Exploration Geophysicists , pp. 3601-3605.
Abstract
Estimation of a power-law frequency-dependent seismic quality factor is introduced into the pre-stack Q inversion (PSQI) method for estimating seismic attenuation from prestack data. The adapted method is tested with synthetic data, and found to estimate successfully the frequency dependence of the attenuation quality factor, within errors. Notably, though, if low frequencies (<20Hz) are excluded from the inversion, then frequency dependent estimates become inaccurate. The adapted PSQI method is applied to a CDP supergather over a North Sea oil field, and a slight frequency dependence on the attenuation quality factors is found, with a mean frequency exponent of 0.03±0.10. A previous study, based on available well log data, has found that the scattering attenuation quality factor value, in the range of 2.28s TWT and 2.68s TWT, shows a negative dependency on frequency, and can therefore account for much of the frequency dependence seen in the surface seismic results in this region.
Metadata
Item Type: | Proceedings Paper |
---|---|
Authors/Creators: |
|
Editors: |
|
Copyright, Publisher and Additional Information: | (c) 2015, SEG. This is an author produced version of the paper 'Beckwith, JA and Clark, R (2015) Estimating frequency-dependent attenuation quality factors in pre-stack surface seismic data. In: Schneider, RV, (ed.) SEG Technical Program Expanded Abstracts 2015. 2015 Society of Exploration Geophysicists Annual Meeting, 18-23 Oct 2015, New Orleans, USA. Society of Exploration Geophysicists , pp. 3601-3605', available at http://doi.org/10.1190/segam2015-5869703.1. Use is subject to SEG's terms of use and conditions. |
Keywords: | Q; attenuation |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Aug 2016 15:40 |
Last Modified: | 21 Apr 2017 09:26 |
Published Version: | http://doi.org/10.1190/segam2015-5869703.1 |
Status: | Published |
Publisher: | Society of Exploration Geophysicists |
Identification Number: | 10.1190/segam2015-5869703.1 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:103178 |