Birefringence Analysis Using Simulated Annealing

B018 Z-99 Birefringence analysis using simulated Abstract 1 By using PS-wave multi-component seismic data it is possible to obtain robust estimates of several subsurface parameters. A global optimization algorithm is proposed to automatically estimate highresolution birefringence (splitting) attributes versus depth. Estimated quantities such as the natural direction of the fast S-wave and the time lag between the fast and slow S-waves can be directly related to fracture orientation and their density. Birefringence effects of the overburden must be determined and removed prior to estimation of the fracture properties at target horizons. Tests of this global optimization method on synthetic and