The well spudded late on 29 May and is expected to take about 50 days to drill to its planned total depth of about 4686 metres.
Operator Woodside will drill the well in 320 metres of water using the semi-submersible drilling rig, Ocean America.
Project partner Cue Energy chief executive Mark Paton said the well was the culmination of an extensive seismic and technical programme carried out over recent years, with the company saying there could be up to 1.5