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Distribution of Faulted Mesozoic and Tertiary Seals for CCS in the Horda Platform, Northern North Sea
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 82nd EAGE Annual Conference & Exhibition, Oct 2021, Volume 2021, p.1 - 5
Abstract
The presence of Upper Jurassic through Lower Paleogene sealing units in the Horda Platform has been assessed and established for the purpose of derisking the Alpha CO₂ storage prospect in the Smeaheia fault block. The nearby Troll East field closure provides as an excellent analogue for evaluating seals surrounding the Alpha closure. Analysis of mapped horizons and trap-bounding faults indicates that all sealing units are required to retain the hydrocarbons trapped at Troll East. Contrastingly, only the Draupne Formation and Cromer Knoll Group are needed to seal the top of Alpha, while the Cromer Knoll is needed to laterally seal the closure. Overall, if the Troll East analogy holds true for Alpha, the arrangement of top and lateral seals appears suitable for CCS at Smeaheia.