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Power of the Azimuth - How to Get the Most out of your Full Azimuth Survey - A Case Study from AustraliaNormal access

Authors: A. Poole, P. Bilsby, J. Graham and M. Giles
Event name: 78th EAGE Conference and Exhibition 2016
Session: Seismic Interpolation and Regularization
Publication date: 31 May 2016
DOI: 10.3997/2214-4609.201601242
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.41Mb )
Price: € 20

Over the last five years the availability of robust and integrated high channel count point-source/point receiver land seismic acquisition systems has allowed the cost-effective acquisition of long-offset full-azimuth onshore seismic data. Long-offset full-azimuth data becomes the industry norm for onshore seismic acquisition it brings new challenges that must be addressed if the full potential of the data is to be achieved. One current issue is the perception of the value of full-azimuth data where legacy workflows lead to a failure to meet expectations, with respect to improvement in bandwidth & interpretability, when compared to legacy data often acquired with narrow azimuths. To improve the value proposition for full-azimuth data we must investigate and resolve issues that span all aspects of the data processing chain. In this paper we demonstrate on full-azimuth point-source/point-receiver field data how an azimuth ‘aware’ processing strategy can provide a clear uplift in the final imaging and, in our ability to extract geologically plausible reservoir structures and properties including density through a simultaneous azimuthal AVO inversion. Key enablers of the azimuth ‘aware’ processing strategy are discussed together with their impact both preserving and then facilitating the use of the azimuthal seismic response in the data.

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