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Three-dimensional Marine CSEM Forward Modelling in the Flemish Pass Basin Using Realistic Unstructured Meshes
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Recent seismic data acquired in the Flemish Pass Basin offshore Newfoundland and Labrador shows AVO anomalies in three Tithonian age sands up-dip from where a well was drilled, Mizzen L-11, which indicates a potential for hydrocarbons. As an alternative to fluid substitution, this study considers marine CSEM forward modelling to assess the reservoir potential and de-risk the prospect. In the context of this study, it is important to know if a sensitivity to these Tithonian sands even exists, so a 1D forward modelling analysis for sensitivity was performed. The sensitivities derived from 1D modelling are overestimated due to the 1D assumption, but nonetheless give an indication of the preferred frequencies to use for 3D modelling. The 3D models were built by incrementally adding surfaces to gradually increase complexity resulting in three distinct models. In summary, the constructed models were able to reflect the necessary scale and complexity of the Flemish Pass Basin, and the marine CSEM results generated from these three models were of good quality and convergence. The results and models shown here are preliminary, but they serve as important stepping stones to incorporating reservoir information in upcoming future work.