Migración mediante apilado por difracción en medios con gradiente constante de velocidad

Resumen

In order to investigate the reflectivity in the earth subsurface by seismic method, we need to introduce some assumption about the macrovelocity model above the reflector. This is achieved by applying to the input seismic data a weighted diffraction stack operator, which theoretical development is based on a Kirchhoff type migration integral. By choosing the proper weight for stacking the data, the result of the migration process is a seismic section where the amplitude is proportional to the reflection coefficient, the so-called true-arnpli tude migration. For considering a more realistic situation, we develope a migration algorithm that works very well with constant gradient velocity media and the parameter cuantificated for results. In order to better understanding the numerical behavior of the proposed algorithm, we consider in this paper only the kinematic aspects of migration process, i.e. when the weight function is the unit.