1887

Abstract

Summary

The Sleipner storage site hosts one of the most complex CO plumes in the world. The geological characteristics of the aquifer unit pose several challenges that complicate the understanding of vertical CO migration and its forecasting through reservoir modeling. In this study, we apply Full-Waveform Inversion (FWI) up to 70 Hz using an Ocean-Bottom Node (OBN) seismic survey acquired in 2023 over the Sleipner storage site. The inversion reveals the complex 3D structure of the CO plume, including vertical migration pathways, channels, and fairways that control both vertical and lateral CO migration at the site. By comparing our inversion results with high-quality FWI results derived from a towed-streamer (TS) dataset acquired in 2010, we analyze the evolution of CO layers and migration pathways to improve understanding of vertical CO migration at the site. Our results suggest that FWI can be applied, either repeatedly, for CO plume monitoring, or as a single 3D application to map vertical migration features that have the potential to improve future CO storage forecasting and conformance assurance.

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/content/papers/10.3997/2214-4609.202521106
2025-10-27
2026-01-25
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References

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