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An Adaptive Filtering Approach to Noise Estimates for Use in Diversity Stacks for DAS VspsNormal access

Authors: M.J. Williams, J.H. Le Calvez, T. Cuny and A. Hartog
Event name: 79th EAGE Conference and Exhibition 2017
Session: VSP Case Histories and DAS
Publication date: 12 June 2017
DOI: 10.3997/2214-4609.201700516
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.76Mb )
Price: € 20

Summary:
We have investigated noise estimation in distributed acoustic sensing (DAS). We used an adaptive Wiener filtering method to construct noise maps. The resulting noise maps can be stored together with the images themselves and used in diversity stacks, which provide an uplift in time-lapse repeatability over linear stacking. We found that relatively large gains in VSP repeatability can be made from simple techniques.


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