Cajón de los Caballos diabase (Neuquén Basin, Mendoza, Argentina): An atypical hydrocarbon reservoir.

DE LA CAL, H.G.; LAJOINIE, M.F.; SALVIOLI, M.A.; LANFRANCHINI, M.E.; FEINSTEIN, ENRIQUE

Ciudad de Mendoza

Conferencia; Laccoliths, sills and dykes (LASI6): The physical geology of subvolcanic systems; 2019

It is well known that in the Valle del Río Grande area, Neuquén Basin, an atypical petroleum system related to magmatism was developed (Garcia et al. 1982, Witte et al. 2012, Alberdi-Genolet 2013, Schiuma and Llambias 2014, Spacapan et al. 2018). This system was often related to the Tertiary magmatism rocks classified as andesites and basaltic-andesites (Nullo 2002, Witte et al. 2012, Alberdi-Genolet 2013, Schiuma and Llambias 2014, Spacapan et al. 2018). In this work, we present new petrographic studies of cutting samples recovered from 4 wells drilled in the past by YPF in the Cajón de los Caballos area. These rocks were initially denominated as augitic basalts and andesites. The aim of this study is to propose a new classification for these rocks and to show that its plutonic equivalents can also form part of this kind of atypical system.