3D Gaussian Beam Imaging of 3D3C VSP Data

The approach to true amplitude seismic imaging for 3D Vertical Seismic Profile (VSP) three component data is presented and discussed. This approach is migration procedure based on weighted summation of prestack data. True amplitude weights are computed with application of Gaussian beams. In order to get difraction image these beams are taken in a way forming so called selective images. Their geometry provides suppression of regularly reflected waves and, thus, emphasizes the presence of small-scale heterogeneities that give rise to diffracted/scattered waves. The use of P- and S-wave Gaussian beams provides the possibility to handle raw multi component data without of their preliminary separation to PP and PS waves.