1887

Abstract

Summary

Carbon sequestration monitoring demands high-resolution imaging to ensure conformance and containment of the injected CO2. This requires good imaging of the reservoir, CO2 plume, CO2 migration pathways, and depositional features, as well as detailed mapping of the overburden, to detect small volumes of CO2 in case of leakage. In 2023, a regional, high-quality, ocean bottom node survey, covering the Sleipner storage site was acquired, comprising long-offsets, multi-azimuth illumination and multi-component recordings. We applied Full Waveform Inversion (FWI) up to 70 Hz, the highest frequency inverted for at the Sleipner plume, to achieve a high-fidelity reconstruction of the CO2 plume structure, migration pathways, and depositional features influencing CO2 migration. The inversion also provided a high-resolution image of the near surface, filling illumination gaps and offering improved definition of vertical migration pathways for CO2 compared to Reverse Time Migration (RTM). Our results demonstrate FWI as valuable tool for conformance and containment assurance, that can also provide valuable insights for CO2 migration forecasting.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202510683
2025-06-02
2026-02-16

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References

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/content/papers/10.3997/2214-4609.202510683
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Full-Wavefield Imaging the Sleipner CO2 Plume using Full-Azimuth OBN Data
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202510683
/content/papers/10.3997/2214-4609.202510683
/content/papers/10.3997/2214-4609.202510683
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