ELEVATED gas shows were observed when AWE’s Irwin 1 well intersected the top of the Dongara sandstone at 3,146 metres, penetrating 120 metres of the primary target formation, the Dongara/Wagina sandstones, the company reported on 24 April.

In a statement AWE said the Irwin 1 exploration well, located in the onshore Perth basin, Western Australia, had reached a total depth of 4049 metres and preparations are underway to commence a wireline logging program.

The interval will be further evaluated with a wireline logging program after the deeper, secondary objectives have been drilled and the well has reached the planned total depth.

AWE managing director Bruce Clement said the results were promising and highlight the exploration potential of the Perth basin.

“We are drilling ahead and plan to intersect the deeper, secondary formations before undertaking a wireline logging program and evaluating the reservoir potential of the Irwin prospect,” Mr Clement said.

Spudded on 25 March 2015, the well is being drilled vertically to a planned total depth of 4,064 metres and is forecast to take approximately seven weeks to complete.

AWE said Irwin 1 is designed to test the gas potential to the east of the Senecio and Waitsia gas fields and has multiple reservoir objectives in the Dongara and Wagina tight sandstone formations, the Carynginia shale and Irwin river coal measures, and the deeper Kingia and High Cliff sandstones.

AWE said it may undertake a flow test of the Irwin 1 well to better establish the commercial potential of the reservoir(s).

Located approximately 22.7 kilometres east of Dongara, Irwin- 1 is the first well of a three well drilling program planned for the Perth basin in 2015.

AWE said it will be followed by the Waitsia 1 and Waitsia 2 appraisal wells on the newly discovered Waitsia gas field.

The Irwin 1 drilling program is being operated by AWE under an agency agreement with joint venture partner, Origin Energy.