Tomographic Residual Moveout Inversion of PreSTM Common-Image-Gathers

Z-99 Tomographic residual moveout inversion of PreSTM common-image-gathers B039 Abstract 1 We present a new tomographic inversion technique for 3D anisotropic velocity-depth model building which inverts the residual moveout in PreSTM image gathers in a horizon consistent manner using the interpretations in the corresponding time migrated image. Our experience shows that tomographic inversion of PreSTM residual moveout provides velocity-depth models that require only small final updates via PreSDM residual moveout inversion in case of moderately complex structures. Since tomography after PreSTM uses time domain data it allows full non-linear inversion which shortens considerably the PreSDM cycle on industrial projects. Another