Global Oil & Gas Ltd., Perth, agreed to fund 50% of the costs of drilling the Sasanof-1 wildcat in permit WA-519-P in the offshore Carnarvon basin of Western Australia through the acquisition of 25% of permit license holder Western Gas (519 P) Pty Ltd.
The wildcat will be a vertical well drilled to a total depth of about 2,500 m in a water depth of 1,070 m at an estimated cost of $20 million.
The Sasanof prospect, a large structural-stratigraphic trap with an aerial extent of 400 sq km, lies adjacent to Western Gas’ Equus gas project and has independently been assessed by ERC Equipoise Ltd to potentially hold a 2U prospective resource of 7 tcf of gas and 176 million bbl of condensate (on a P50 basis).
The prospective reservoir sands lie at the top of the Cretaceous Lower Barrow Group formation.
Sasanof-1 is to be drilled by the Valaris MS-1 semi-submersible rig about 207 km northwest of Onslow on the Western Australian coast in first-quarter 2022.
Western Gas has contracted AGR Australia to manage the drilling campaign.
The prospect is on-trend with the Mentor gas-condensate field which is one of the Equus group fields. Western Gas says Mentoc field is “filled to spill” into the updip Sasanof prospect to the west.