Computation of residual statics in complex geological areas using simulated annealing method based on minimization of objective function

Complex geological areas having large source and receiver residual statics issues due to high contamination of noise in the seismic data, can be resolved using the simulated annealing approach. Conventional techniques are not robust enough to resolve the residual statics correction problems, thus resulting in poor image quality of seismic reflection data. This paper presents the simulated annealing method, a nonlinear technique for objective function minimization based on the problems of random sampling. The pre-stack seismic data in complex geological conditions with intense noise contamination is used, where the other linear inversion methods are ineffective and failed to produce good quality stack image. The molecular dynamics simulation method using the simulated annealing approach to minimize the objective function has successfully resolved the issue of cycle skipping/lack of reflector continuity. It is an iterative process with varying sequence of parameters within each iteration, which requires high computation power and long run time to minimize the large magnitude of reflection statics values. This method is applied on a very complex area of Baluchistan basin, Pakistan.