Anisotropic elastic reverse time migration with Gaussian beams for multicomponent data

Elastic reverse time migration with Gaussian beams is a flexible and adaptable imaging tool for multicomponent seismic data, because it can image the structures of the subsurface media more accurately. As the earth is anisotropic in real case, the ignorance of the anisotropy will bring artifacts to the image result. In this abstract, we propose an anisotropic elastic reverse time migration with Gaussian beams method for multicomponent seismic data, which combines the high calculation efficiency of elastic Gaussian beam migration and the high imaging accuracy of elastic reverse time migration. We develop an anisotropic elastic-wave ray tracing algorithm based on the phase velocity. Meanwhile, we calculate the Green function by performing a summation of elastic Gaussian beams for the construction of forward and backward continuation wavefields. According to the incident angle, we introduce a symbol function to implement the polarization correction in the PS-wave migration. The numerical tests on anisotropic Complex structural model indicate the effectiveness and applicability of the proposed method. Presentation Date: Monday, September 16, 2019 Session Start Time: 1:50 PM Presentation Time: 3:55 PM Location: 225C Presentation Type: Oral