Most current reservoir-characterization workflows are based on classic amplitude-variation-with-offset (AVO) inversion techniques. Although these methods have been widely used over the years, full-waveform inversion (FWI) represents a potentially powerful tool for higher-resolution reservoir characterization. An important step in developing reservoir-oriented FWI is the implementation of facies-based rock-physics constraints adapted from the classic methods. We show that such constraints can be incorporated into FWI by adding appropriately designed regularization terms to the objective function. The advantages of the proposed algorithm are demonstrated on both isotropic and VTI (transversely isotropic with a vertical symmetry axis) models with pronounced lateral and vertical heterogeneity. The inversion results are in agreement with published theoretical radiation patterns produced by perturbations in the medium parameters.
Presentation Date: Tuesday, September 26, 2017
Start Time: 11:25 AM
1 Colorado School of Mines
2 Ikon Science