Print Email Facebook Twitter Estimating large-scale uncertainty in the context of full-waveform inversion Title Estimating large-scale uncertainty in the context of full-waveform inversion Author Mulder, W.A. (TU Delft Applied Geophysics and Petrophysics; Shell Global Solutions International B.V.) Kuvshinov, B. (Shell Global Solutions International B.V.) Date 2023 Abstract The uncertainty of model parameters obtained by full-waveform inversion can be determined from the hessian of the least-squares error functional. Because the hessian is generally too costly to compute and too large to be stored, a segmented representation of perturbations of the reconstructed subsurface model in the form of geological units is proposed. This enables the computation of the hessian and the related covariance matrix on a larger length scale. A synthetic 2-D isotropic elastic example illustrates how conditional and marginal uncertainties can be estimated for the properties per geological unit by themselves and in relation to other units. A discussion on how the chosen length scale affects the result is included. To reference this document use: http://resolver.tudelft.nl/uuid:5d894220-3cca-4932-bd0e-86c40503e2e6 DOI https://doi.org/10.3997/2214-4609.202310304 Event 84th EAGE ANNUAL Conference and Exhibition 2023, 2023-06-05 → 2023-06-08, Vienna, Austria Part of collection Institutional Repository Document type conference paper Rights © 2023 W.A. Mulder, B. Kuvshinov Files PDF 304.pdf 738.84 KB Close viewer /islandora/object/uuid:5d894220-3cca-4932-bd0e-86c40503e2e6/datastream/OBJ/view