The present work is a stratigraphic, reservoir, and environmental analysis of the Itarare Group (Permo-Carboniferous) using the well data of the Parana Basin which covers about 1,000,000 Km$\sp{2}$ in Brazil alone. More than three thousand kilometers of cross sections were analysed, over 100 wells were studied, nearly 400 meters of cores were described, and 95 thin sections were analysed.