VTI migration velocity analysis using RTM

Conclusions

In this paper, we define an image-space inverse problem to solve for an optimized anisotropy model. To better describe the properties of the subsurface and the wave propagation, we use the first-order VTI two-way wave equation to compute our Green's function. Test results on objective function show that flatness in the angle domain is a valid measure of both velocity and anisotropic parameter $\epsilon$ . The results of single-parameter and joint inversions demonstrate that we have successfully resolved the high-frequency structure in velocity and successfully improved the anisotropic model where we have enough angle coverage. The updated image has flattened the gathers in the angle domain.