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Abstract

Summary

The 3D methods to monitor the CO distribution at the Sleipner injection site have mostly been based on time-migrated image results. Full waveform inversion methods have also been applied to the problem with some success. However, the contribution to the characterization of the CO plume was limited, because the applications were restricted to 2D data or to low frequencies only.

Based on recent improvements, we apply a 3D acoustic FWI with up to 48Hz to the marine 2010 dataset with the aim to better resolve the details in the plume and to improve the image directly below it. We achieve a significantly higher resolved velocity model where at least seven layers can be discerned. A vertical low velocity structure is visible, which is at the same place as the main CO distribution chimney. And the location of the injection point is consistent with the strongest velocity anomaly below the CO plume. A PSDM image based on the updated velocity model shows significantly less depth error at the Base Utsira horizon than with a previous model.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.201901566
2019-06-03
2024-04-25

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201901566
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High Frequency 3D FWI at Sleipner: A Closer Look at the CO2 Plume
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201901566
/content/papers/10.3997/2214-4609.201901566
/content/papers/10.3997/2214-4609.201901566
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