Ann: Corporate Presentation - Pavo Discovery, page-46

Me I'm as dumb as ditch water so no idea , but I managed to lift these excerpts.
Gas might be at those levels from what I read. They did say that at those depths adquate seals were present to trap hydrocarbons, but reservoir quality is a real issue.

Permian, Triassic, and Jurassic fluvio-deltaic sandstones are considered the primary objectives of the offshore Canning Basin. The producing units of the onshore area are deeply buried in the offshore, however, and possess lower reservoir quality. Thick Lower Triassic and Cretaceous shales do provide adequate seals.
The search for shale gas resources in the Canning Basin is in the early exploration phase. However, similarities exist between the Ordovician Goldwyer Formation and gas shales of the United States (US)

.Source rock data is sparse, but indicates excellent gas-prone source rocks in the Early Permian and excellent/good oil-prone source rocks in the Early Ordovician, Late Devonian, Early Carboniferous and Late Permian.

Leatherback-1 (1991) discovered Triassic oil within a tilted fault block and proved the viability of this play type on the eastern margin of the Northern Carnarvon Basin.