Specifics of seismic data processing based on the layer-model description,
Isakov Mihail Aleksandrovich, Silaenkov Oleg Aleksandrovich, Seismotech Ltd, Moscow
The main result of the modern seismic processing are depth velocity model, and common image gathers, which do not contradict with the initial seismic data and geological model view. Seismic processing, traditionally, is divided by two stages: time processing in the average velocity model, and depth conversions. Using the conventional method of time processing, the near-surface section is described with the static model. The parameters of static corrections and stacking velocities are selected to provide appropriate stacking conditions and to obtain a representative time section/cube. After that the migration in the average velocity model is performed. The result of such approach is a seismic image, which can be converted in the depth scale using the well data.
However, the depth imaging requires a different approach for time processing, which is focused on the depth-model building. In this report we are going to discuss a real example of such processing and describe the main features of the applied technique.