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Seismic Amplitude Analysis Reveal New Volcanic and Basement Related Petroleum Plays in the Faeroes
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Since the discovery and continued development of fields with basement related petroleum plays interest has grown on how seismic can better detect hydrocarbon filled porosity in the basement — be it crystalline/metamorphic or basaltic, in this work we have focused on seismic amplitude analysis related to fractured zones that had always been overlooked. It had been demonstrated that not only old basement highs and transfer faults should be considered, but in particular wrench faults that are associated with the opening of the Atlantic and reactivation of earlier tectonic fabrics.
Apart from the geometric reconstruction we further exploited the information contained in the variation of seismic amplitudes both post-as well as prestack as a support to further develop established ideas of geological processes that had taken place with an eye on new play types for the regional complex syn-and post rifting and associated volcanic history. The seismic interpretation of “geometric features” like fault blocks and clinoforms form only a first step in the reconstruction of macro scale structural and related sediment fill geological history. The amplitude variations, “the character” of reflectors, the impedance as derived seismic attribute and selected fracture sensitive attributes improved the geological history reconstruction and lithology determination