Shape reconstruction in seismic full waveform inversion using a level set approach and time reversal

• Seismic full waveform inversion using a conservative elastic wave formulation. Time reversal with symmetric hyperbolic system for propagation. Shape evolution salt body estimation an implicit level set The use of Sobolev gradients shape regularization. A nonlinear Kaczmarz type approach sequential data processing. based is presented the special emphasis on application to seismic inversion. representation linear equation motion in 2D formulated as system. minimization suitably chosen least-squares misfit functional then performed by approach. This driven gradient-based descent directions which are practically obtained solving time-reversed form same method employed computational description evolving shapes. Different regularization schemes tested and compared stabilizing this evolution, combined additional integrated optimization loop simultaneously estimating different internal parameter values. Numerical experiments demonstrate performance novel reconstruction scheme dome