Seismic inversion for offshore wind: Implications of near-surface soils on AVO approximations
Seismic inversion for offshore wind: Implications of near-surface soils on AVO approximations
AVO inversion applied to UHRS data for offshore wind is a means to obtain high resolution, quantitative information of the near-surface to incorporate directly into ground models for site investigation. The Aki-Richards (1980) approximations to the exact Zoeppritz (1919) equations have been applied to oil and gas exploration studies for decades, however the assumptions associated with this approximation in the context of the complexity of offshore wind is not well understood. In this study, we present the results of synthetic AVO modelling and AVO inversion tests comparing Aki-Richards approximations to exact Zoeppritz for relevant examples including a glauconite sand within a quartz sand background and a interbedded cemented and uncemented carbonate profile. The effect of noise on the both synthetic seismic and the inversion are explored and we observe that even with significant amounts of seismic noise, large differences are still observed between the two AVO equations in synthetic seismic and AVO inversion results, suggesting that in UHRS datasets with high levels of noise, these effects are still expected to be observable.
Evan Mutual; Esben Dalgaard; B. Stuyts; Rob Ross; Ulysse Lebrec; M. Fraser Bransby; Phil Watson
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
4 - Ground models
https://doi.org/10.53243/ISFOG2025-386
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