Method for evaluating three-dimensional seismic observation systems

The invention relates to a method for evaluating three-dimensional seismic observation systems. The method includes carrying out forward and pre-stack time migration imaging on the three-dimensional seismic observation systems according to geological models of target areas and acquiring pre-stack time migration results of various offset sections in separate offset section stacking recording modes; sorting offset from small to large to obtain pre-stack time migration gathers, and acquiring amplitudes corresponding to the various offset sections along seismic events in the gathers to obtain AVO [amplitude VS (versus) offset] response of the three-dimensional seismic observation systems in the target areas; evaluating and optimizing the three-dimensional seismic observation systems in the target areas according to amplitude change scopes and the stability of the obtained AVO of the three-dimensional seismic observation systems. The method has the advantages that the shortcoming of possibly excessive AVO response of three-dimensional seismic observation systems designed by the aid of conventional methods can be effectively overcome, the method is favorable for optimizing the three-dimensional seismic observation systems which are suitable for the target areas and are high in amplitude fidelity, and excellent foundations can be laid for AVO analysis and pre-stack inversion at interpretation stages.