Abstract：Regarding the widely used Kirchhoff pre-stack time migration,a new azimuth-angle domain imaging method which fits both isotropic media and VTI media was proposed in this paper. The key of the algorism includes reasonable estimation of the two-way time for the seismic ray,average azimuth and local incidence angle,and then based on impulse response stacking principle the imaged 3D data volume and 5D azimuth-angle domain common imaging point gather were acquired. The algorithm's main advantages lies in its ability to obtain high quality common imaging point gather in 3D angle domain,and to utilize sidewise scattering energy in improving the description for 3D faults,slant interface,fractures and other special geological bodies. The new algorithm could provide excellent solution for more and more high resolution imaging projects,attribute analysis projects and reservoir characterization projects in wide azimuth 3D seismic data. The synthetic data test for SEG/Hess VTI model in 2D Isotropic Media revealed the accuracy difference for the several angle domain imaging algorithms which were described in this paper. The synthetic data imaging results for 3D fault model show that the algorithm presented in this paper could reasonably describe the reflection time difference and the amplitude variations with the azimuth and the incidence angle.
