Método sísmico e sua aplicação nas Bacias de Sergipe e Alagoas

Abstract

Seismic methods are now a routine part of oil prospecting and geological research in sedimentary basins. In this paper, a detailed review of acquisition, processing and interpretation methods within the concept of reflection seismic is presented. The sedimentary basin of Sergipe and Alagoas was chosen as the study point. Occupying an elongated strip on the east coast of Brazil, this sedimentary basin has the advantage of registering in Brazil the most complete stratigraphic succession, including remnants of a paleozoic sedimentation, a widely developed pre-rift-Jurassic / ekretacic package, and classic meso-sequence. Sinrifte and post-rift cenozoic. The Sergipe-Alagoas basin is also characterized by a series of hydrocarbon accumulations relative to different source rocks, including Continentale Transitional megasequence shales and Marine megasequence shales / carbonates. These characteristics led the basin to occupy one of the most traditional oil producers in the country, along with the Recôncavo basin. After reviewing the theory of reflection seismic, the CMP technique, equipment and acquisition routines on land and sea, processing flows for obtaining and interpreting seismic sections, we present a study of seismic in the basin and its usefulness to unravel. subsurface geology. The possible new geological interpretations in the very deep water region are emphasized, where we focus only on geophysical data as there is no well information available.