Análise de um projeto sísmico na área de Convunco, província de Neuquén

Abstract

This work has as main objective the study of a seismic project carried out by Lubín Eric Cayo (2005), in the region of Covunco, province of Neuquén, Argentina. Seismic methods were employed across 49 2D lines, over 790 km long, covering approximately 950 m². In addition to additional information from the logging of 21 wells, 18 of them within the study area, the synthetic 4-well seismogram was prepared. By correlating the synthetic seismogram with the seismic lines, it was possible to trace various seismic horizons. Five seismic sections were analyzed to represent the structural shape of the study area, as well as the arrangement of the different sedimentary units that were interpreted. Only two horizons have been identified with clarity and continuity, the top of the Mulichinco formation and the top of the Tordillo formation. Through these horizons, isochronous maps were drawn. By obtaining these maps it was possible to identify: an important fault front located in the western sector of the area with numerous subordinate faults. The existence of numerous structures of interest, some coinciding with existing wells; and the deepening of the formations to the north of the area, coinciding with the location of the center of the basin. The author identified a zone of interest from isochronous maps, which was proposed as a possible drilling object, as it is in an interesting structural position and is accompanied by strong fracturing. However, the drilling of this new well must be preceded by a 3D seismic acquisition.