Aplicação do método magnético na exploração geofísica: estudo de caso: bacia Oriente, Equador

Abstract

In this paper we show the theory and application of the magnetic method in geophysical exploration, with emphasis on hydrocarbon prospecting. Magnetic methods are one of the oldest geophysical methods and also one of the most widely used in mineral prospecting. The sedimentary basin covered in this paper was the Oriente basin, located in Ecuador, which is part of a set of foreland basins spanning 320,000 km². This system is formed by the Oriente basins, located in Ecuador, Putumayo, Colombia and the Marañon basin, in the Republic of Peru. These basins have very similar depositional characteristics and all of them have petroleum systems and are exploited by various geophysical exploration companies today, including Petrobras. We describe in detail the geological features of the East basin, including aspects of location, extent, stratigraphy, tectonic events, and petroleum systems of the basin. Due to the similarity between the Oriente, Putumayo and Marañon basins, in the case study of this monograph we discussed an article with magnetic measurements performed in the Putumayo basin, since no public article was found in the literature with magnetic measurements performed in the Oriente basin. In the case study we show the characteristics of the survey used, indicating the study area, the equipment used in the survey and the data obtained were analyzed and discussed.