Static correction and its application to seismic data of loess tableland area

A new method of progressively united static correction is proposed for the serious static correction problem of seismic data of loess tableland area in southern Ordos basin.Firstly,grid tomographic inversion static method is used to solve the problem of long wave-length static;secondly,difference residual static method of first arrival is used to solve the problem of short wavelength static;finally,a new hybrid optimization method for estimating static corrections is put forward to solve residual static problem,which involves energy maximization,simulation annealing and hereditary algorithm.The practical application results of seismic data of loess tableland area show that the events of stack section of applying the above method is continuous with good consistency,and the diffraction wave characteristics of breakpoint are obvious.It is thus held that the progressively united static method can solve the static problem of seismic data obtained in this area.Good processing result can be obtained.