The Sahul Block is located in the Sahul Basin in Papua Province, which is located south of the Akimeugah Basin, and is part of the Foreland Basin system

The outcrop analogy was taken in the Wamena area where the most complete Papua stratigraphic sequence was found.Papua's tectonic evolution shows that Australia, Papua and PNG originate from the same geological Mandala, so that the oil and gas potential that has been identified in Australia and PNG can be correlated with the Sahul Basin.Following the terminology by the Australian Geological Survey Organization, there are three petroleum systems present in the North Australia Basin namely: Larapintine, with source rock from the early to mid-Palaeozoic marine facies (shales and carbonates), Gondwanan with source rock dominantly Permian terrestrial facies and Westralian with source rock marine Jurassic source rocks. On the basis of this age similarity, the Larapintine petroleum system can be compared with the Pre-Permian Sequence (Otomuna Formation, Tuaba Formation and Modio Formation), the Gondwanan petroleum system can be compared with the Tipuma & Aiduna Sequence while the Westralian petroleum system is compared with the Kembelangan Sequence.From the integration of all existing data, in Sahul there is only one petroleum system, namely the Pre-Permian petroleum system or in Australian terminology it is referred to as the Larapintine petroleum system.The potential source rock in the Sahul Basin is Otomuna Formation shale with a TOC value of 0.2-0.49%. Meanwhile, the potential reservoir in the Sahul Block is a Neoproterozoic marine sandstone. Based on the analysis of the basin modeling it is known that the maturity window has started at the age of 590 ma at a depth of 2000 m.