Preliminary logging results indicated an 11-metre gross ­hydrocarbon interval in the primary Toro reservoir target, plus another unexpected 12-metre gross column in the overlying Elevala sand.

New Guinea Energy said ­detailed wireline logging would be acquired to interpret the significance of the hydrocarbon indications, and results would be out as they came to hand.

Siphon-1 sits in Block PPL 269 where partners are operator Talisman and New Guinea Energy, both on 50% .