Presentation: Comparison of post-stack seismic amplitude inversion methods to relative acoustic impedance

Slides for the presentation "Comparison of post-stack seismic amplitude inversion methods to relative acoustic impedance" given at the 15th International Congress of the Brazilian Geophysical Society & EXPOGEF 2017, Rio de Janeiro, Brazil.SummaryWe discuss and compare two methodologies to estimated the relative acoustic impedance (RAI). One is the coloured inversion, and the other is a linearized relation between the seismic trace and the impedance, that provides a linear system to be solved for the RAI. Additionally, we investigate the performance of one direct technique and two iterative methods applied to resolving the linear system problem to estimate the RAI seismic section. The numerical experiments demonstrate that the coloured inversion can produce good RAI estimation and that the linear system approach can provide similar results. Tests with real data indicate that the linear system approach can provide a slightly better impedance section than the coloured inversion if the numerical methods applied to solve the linear system problem are optimally parametrized at the well-log position.