The Sasanof-1 well kicked off late last week and drilling is now progressing towards the target reservoir which, the operator expects, will be entered around 2 June. The probe is being drilled by the semi-submersible Valaris MS-1.
The Sasanof wet gas prospect covers an area of up to 400 square kilometres and is on trend and updip of Western Gas’ liquids rich, low CO2 Mentorc field.
UK oil and gas reservoir evaluation firm ERC Equipoise (ERCE) estimates the Sasanof prospect to contain a mean prospective resource of 7.2 trillion cubic feet of gas and 176 million barrels of condensate, with a high case prospective resource estimate of 17.8 Tcf of gas and 449 million barrels of condensate.
Sasanof is a large, seismic amplitude supported, structural-stratigraphic trap in the high-quality reservoir sands at the top of the Cretaceous top Lower Barrow Group formation on the Barrow Delta within the Exmouth Plateau.
The wildcat has a 32% geological chance of success.
Sasanof-1 will be Western Gas’ first well drilled from its extensive exploration portfolio surrounding the existing Equus gas project that contains a discovered resource of 2 Tcf of gas and 42 million barrels of condensate, according to consultant Gaffney Cline & Associates.
The Equus gas project has a historic exploration drilling success rate of 88%, with 15 discoveries from 17 wells.
Partners in Sasanof are operator Western Gas (52.5%), Global Oil & Gas (25%), Prominence Energy (12.5%) and Clontarf Energy (10%).
UK-listed Clontarf just weeks ago farmed in for its 10% working interest in Sasanof.
