Wave equation-based prestack depth migration technique can accurately describe the wave field in complex media conditions and perform high resolution imaging.Its key techniques include datum correction through upward and downward continuations of wave field

velocity model modification of imaging points based on common imaging gather in depth domain

and migration anti-alias filter through interpolation of migration data before and after application of imaging condition equation.Practical application shows that prestack depth migration technique based on wave equation is obviously better than conventional techniques in respects of resolution of wave-groups

detail of fault

imaging accuracy of deep target and preservation of amplitude

etc.