Two investors with deep experience of the US shale gas sector have agreed to invest a combined A$104 million (US$69.5 million) in Australia’s Beetaloo sub-basin through agreements with the ambitious local operator Tamboran Resources.

In separate transactions, Tamboran — which two days ago agreed to acquire Origin Energy’s 77.5% operator interest in a large discovered shale gas resource in the Beetaloo — is being supported by investor Bryan Sheffield and the large US onshore drilling company Helmerich & Payne (H&P).