Organic geochemical signatures of source rocks and oil-source correlation in the Papuan Basin, Papua New Guinea

The Papuan Basin is the largest petroliferous basin in Papua New Guinea (PNG), where developed several sets of potential source rocks (SRs). The Jurassic SRs are clay-rich shales, whose organic matter (OM, mainly type Ⅱ2-Ⅲ) is predominantly derived from terrestrial higher plants deposited in a more...
Ausführliche Beschreibung

The Papuan Basin is the largest petroliferous basin in Papua New Guinea (PNG), where developed several sets of potential source rocks (SRs). The Jurassic SRs are clay-rich shales, whose organic matter (OM, mainly type Ⅱ2-Ⅲ) is predominantly derived from terrestrial higher plants deposited in a more oxic environment with relatively high maturity (0.35%  2, the mild dominance of C29 ααα 20 R sterane and the absence of oleanane ± lupane. Type C2 oils can be clearly distinguished from Type C3 by C19/(C19 + C23) tricyclic terpane <0.5, while the latter ones have higher abundances of oleanane ± lupine and diahopanes as well as C24 tetracyclic/C23 tricyclic terpane ratios. Type C2-3 oils are originated from calcareous SRs that deposited in Late Cretaceous or younger age. Ausführliche Beschreibung