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The search for new accurate methods that imagine the earth subsurface has been of great interest of the petroliferous industry, this reason, the hydrocarbon reservoir normally occurs in portion of sedimentary basins that presents complex geological structures. Taking care of this demand, appeared in the last century, a new technique of seismic data processing namely CRS (Common Reflection Surface ). Which product a stacked section, that simulate a zero offset section and has as advantage on the others traditional techniques an macro velocity model independence. In this work we present the concepts of the new stack method, besides, the necessary stapes used in the seismic data processing. We also approach some concepts regarding of the classic method of seismic data processing, the conventional CMP (Common Midpoint ). We applied the new CRS stack method in three different seismic data sets: (1st) in the synthetics marines data sets, known as Marmousi, that they are based on real information of marine profile in the Cuanza Basin, in Angola, (2nd) in real marines data sets, acquired over the slope of the Jequitinhonha Basin of the seismic line 214-0266, (3rd) in the terrestrial data sets of the Tacutu Basin of the seismic line RL50-90. Even it is macro velocity model independent, the CRS stack method admit that the velocity field has used as inner parameter on the processing, in this way, we evaluated in this work the efficiency of the use of the priori knowledge of the velocity field in the CRS stack of the three cited seismic data sets. To the ending of the stacking process, the seismic data sets were migrated with the Phase Shift method and of the staking methods were compared.

Uso da informação a priori no empilhamento CRS: um estudo comparativo com o empilhamento CMP