Abstract: The characteristics of the azimuth angle，offset and full coverage number distribution about the wide azimuth observation system is analyzed from the perspective of theory.Taking the prospecting area of Mengcheng mining area which is located in the west margin of Ordos basin as an example,the geological structure of prospecting area is developed and the anisotropy of the prospecting area is significant.The exploration results between the wide and narrow azimuth observation system are compared.The results show that,compared with the narrow azimuth observation system,the wide azimuth observation system could make the transition from single coverage to full coverage more faster,the deformation observation of surface barriers can be conducted in the process of field data acquisition.The lateral observation ablity is imprved greatly and the observation azimuth is extended by the wide azimuth observation system,so,the seismic data obtained by the wide azimuth observation system tend to be more holographic 3D,and the azimuth distribution is more uniform.In the process of data processing,more attention should paid to the way of wavelet fidelity,far trace NMO and velocity analysis so as to obtaine the more high resolution and more clear seismic data.Compared with the narrow azimuth seismic exploration,the cover number of wide azimuth seismic exploration is more higher,however,its exloration cost is become higher accordingly.

Key words: Wide azimuth, Observation system, 3D seismic exploration, Seismic observation data