Abstract：Surface-consistent statics using simulated first break is proposed so as to cope with the tough problem in data processing which is caused because near surface seismic velocity increases with dune thickening in Xinjiang deserts. This method makes full use of all first arrivals (i.e.the first break informations of direct wave, reflected wave and refracted waves in multiple layers)instead of usual first break refraction statics, so that the accuracy of statics is improved. Simufated first break times are obtained by fitting exponentially the average of first break times picked form each shot. Thus the simulated first break curve only indicates relation among thickness of near surface layer, velocity and offset, without noises and surface influence included. The ability of automatically picking up first break times is improved because of the use of fitting method. It is a practical method for calculating big static correction values.
