The ENCSO-107 jack-up drilling rig will target the proven Caley Sandstone, which is estimated to hold a mean prospective resource of 545 Bcf of gas and 31 MMbbl of condensate.
The Milne Sandstone is a secondary target, which may contain up to four additional sands of a similar size, albeit with a higher risk.
The drilling of the Dorado-1 well is expected to commence around May 2018, while drilling of the nearby Phoenix South-3 well is expected around March 2018.
Rigs have now been contracted for both wells.
Equity interest holders in WA-437-P are Quadrant Northwest (80 per cent and operator) and Carnarvon Petroleum (20 per cent).