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Technological Advancements in Broadband Processing – A Reprocessing Case History from the Barents SeaNormal access

Authors: P. Cox, P.E. Dhelie, V. Danielsen, S. Bhamber and C. Ditty
Event name: 80th EAGE Conference and Exhibition 2018
Session: Broadband Acquisition and Processing I
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801000
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1011.33Kb )
Price: € 20

Summary:
In 2012 TGS acquired and processed 2500 km2 of narrow azimuth 3D streamer data over the Finnmark Platform, offshore northern Norway, and a further 3800 km2 in 2013, named FP12 and FP13 respectively. The FP12 data were originally processed through a conventional bandwidth sequence in 2012 whilst in 2013, with the emergence of processing based deghosting technology, the FP13 data were processed through a broadband sequence. In the years since 2013, developments in seismic preprocessing technology have resulted in superior tools and solutions with which to address the major challenges that the Finnmark Platform data presents to imaging, such as: high levels of acquisition noise caused by northern latitude marine conditions, notches in the amplitude spectra caused by the interference of ghost reflections and a strong multiple trail set up by the hard seabed surface. Utilising these technological advancements, full reprocessing of the Finnmark Platform data was undertaken resulting in a superior image of the subsurface and single, continuous broadband dataset. Here we discuss the key processing technologies that contributed to the successful reprocessing.


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