In this work, we present some practices in seismic modeling for oil exploration. We have developed a computational tool for 3D synthetic modeling, 3D ray tracing, 2D acoustic wave propagation and 2D depth migration based on reverse time migration technique. The 3D modeling include creation of the terrain, interface, topography, elastic properties, etc. The ray tracing module has implemented two ray tracing algorithms based on bending technique. The implementation is done in parallel using MPI library. The wave propagation and migration module use a 2D velocity map to compute snapshots, synthetic seismogram and seismic image. In this case, the parallelism is exploited on the shots line for the wave propagation and the domain decomposition for the depth