GNGTS 2018 - 37° Convegno Nazionale

GNGTS 2018 S essione 3.3 721 of the subsurface model. These strategies have been applied to 1D seismic-petrophysical inversion, 1D AVA inversion and 2D cross-hole tomography. The comparisons with the more standard approach to global inversion (based on a simple L2 norm data misfit function and no regularization/preconditioning operator) prove that the proposed strategies are able to efficiently decrease the ill-conditioning of the optimization problems and provide more stable and reliable final predictions. The proposed strategies also guarantee a faster convergence than the standard approach (aspect not shown here for the lack of space). References AlBinHassan, N. M., Luo, Y., and Al-Faraj, M. N. (2006). 3D edge-preserving smoothing and applications. Geophysics, 71(4), P5-P11. Yang, X. S. (2008). Nature-Inspired Metaheuristic Algorithms. Luniver Press. Zhang, X., and Zhang, J. (2012). Edge preserving regularization for seismic traveltime tomography. In SEG Technical Program Expanded Abstracts 2012, 1-5. Fig. 3 - Cross-hole tomography: Comparison of the results and data gathers provided by the proposed (a) and the standard approach (b). The black and red points represent source and receiver positions, respectively.