2D anisotropic nonslant stack beam migration for multicomponent seismic data

The anisotropic migration method has become an important area of focus that needs to be studied for seismic imaging. Gaussian beam migration (GBM) is a valid imaging technique used for anisotropic media and complex subsurface structures. Previous studies on GBM universally rely on local slant stack, which has certain limitations, such as not being suitable for irregularly acquired data. Here, we propose a 2D anisotropic nonslant stack GBM method for anisotropic multicomponent seismic data. We first derive accurate reverse-continued wavefield formula, where Gaussian beams are directly employed to calculate Green’s function. Based on the 2D anisotropic ray-tracing system, we present anisotropic PP-wave and converted PS-wave nonslant stack GBM algorithms. Numerical examples demonstrate that our migration method is an effective imaging alternative for anisotropic multicomponent seismic data.