The southeastern Sichuan region has large elevation differences

complex surface conditions

large stratum dip

and complex conditions underground

so that the accurate imaging is difficult. In the support of shale gas exploration and development

there are problems of inconsistent well seismic wave group occurrence

false faults and well seismic prediction errors for the pre-processed data in this area. Aiming at these problems

the well-control anisotropic pre-stack depth migration method is proposed and applied to the above three-dimensional work area. By improving the accuracy of the velocity model

the seismic imaging accuracy of the complex fold area is improved

and it plays an important role in guiding the later well position

and improving the high-quality shale drilling rate. In this paper

the accuracy of the migration velocity model is finely characterized from two aspects: isotropy and anisotropy. Through the deep research and practice of high-precision grid tomography velocity modeling

travel（TPT）and TTI（transverse isotropic media with axial inclined symmetry）

the key technology series of seismic precision imaging in southeast Sichuan is gradually improved to enhance the well seismic yield consistency

reduce the well earthquake depth prediction error

eliminate the fault illusion of seismic profile

and provide important technical support for subsequent exploration and development of shale gas deployment.