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Statistical Modelling of Pre-injection Noise Recorded at the Aquistore Carbon Storage SiteNormal access

Authors: C. Birnie, K. Chambers and D. Angus
Event name: 78th EAGE Conference and Exhibition 2016
Session: Seismic Noise Attenuation
Publication date: 31 May 2016
DOI: 10.3997/2214-4609.201601588
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 2.49Mb )
Price: € 20

Noise is a persistent feature in seismic data and so poses challenges in extracting increased accuracy in seismic images and physical interpretation of the subsurface. A previous noise analysis on the passive seismic dataset collected on a permanent surface array at the Aquistore carbon storage site identified individual noise signals, broadly classified as stationary, pseudo non-stationary and non-stationary, providing a basis on which to build an appropriate spatial and temporal noise field model. We introduce a novel noise modelling method based on a statistical covariance modelling approach created through the modelling of individual noise signals. This modelling method provides a significantly more accurate characterisation of real seismic noise compared to noise models created using conventional methods. Furthermore, we have developed a workflow to incorporate realistic noise models within synthetic seismic datasets providing an opportunity to test and analyse detection and imaging algorithms under realistic noise conditions.

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