Estudo de Gravimetria na Bacia de Sergipe-Alagoas

Abstract

Toe geology of the Sergipe-Alagoas Basin has the more complete Stratigraphic sequence of the Brazilian basins, with some differences that make with that the basin can be subdivided in the sub-basins Sergipe and Alagoas, separate for the features called alto de Jaboatã-Penedo. The basin is part of the Brazilian east margin, proceeding from passive margin, passing for the estages pre-rift, rift, evaporitic and pos-rift, providing with these stages the generation, migration and accumulation of oil, including the Carmópolis field that represents the greater accumulates of oil in on shore fields with a volume in place of 250 million m 3 of oil. The geologic knowledge of the Sergipe-Alagoas Basin is resulted of the application of diverse investigations methods, including the geophysical methods, such as the gravimetric methods, that it aims at an interpretation through of gravimetric anomalies for the existing differences of density in the rocks in subsurface. This method although not to be the more used geophysical method in the prospection of hydrocarbons, it is very efficient in some aspects of exploration, mainly because it can do survey of great areas with low cost and to delimit the main structural features, helping in the agreement of the evolution of the basin. We can with this method see that the Brazilian east margin is inside of the model waited for passive margins, and also to get more one explanation that the better prospection for hydrocarbons ofthe terrestrial portion of the Sergipe-Alagoas Basin.