Exploration Drilling Continues at Irwin-1 Well in Onshore Perth Basin in WA



AWE Limited reported Wednesday that as at 06:00 hours (6.00am) AWST today the Irwin-1 exploration well, located in the onshore Perth Basin, Western Australia, had been drilled to a measured depth of 9,088 feet (2,770 meters) and was preparing to pull the drill string out of the hole prior to running 9.625 inch casing.

The Irwin prospect straddles the EP320 (AWE 33 percent) and L1 (AWE 50 percent, Operator) boundary and the Irwin-1 drilling program is being operated by AWE under an agency agreement with joint venture partner, Origin Energy Limited.

The Irwin-1 exploration well was spud March 25. The well will be drilled vertically to a planned total depth of 13,333 feet (4,064 meters) and is forecast to take approximately seven weeks to complete.

Irwin-1 is designed to test the gas potential to the east of the Senecio and Waitsia gas fields and is targeting the Dongara and Wagina tight sandstone formations, the Carynginia Shale and Irwin River Coal Measures, as well as deeper conventional targets in the Kingia and High Cliff Sandstones.

If the results are positive, AWE may undertake a flow test of the Irwin-1 well to better establish the commercial potential of the reservoir(s). The approved work program for the Irwin-1 exploration well does not include hydraulic fracture stimulation.

The Irwin-1 exploration well is located approximately 14.1 miles (22.7 kilometers) east of Dongara, Western Australia. Irwin-1 is the first well of a three well drilling program planned for the Perth Basin in 2015. It will be followed by the Waitsia-1 and Waitsia-2 appraisal wells on the newly discovered Waitsia Gas Field.

The Joint Venture partners in EP320 are:

  • AWE Limited (via subsidiaries) - 33.0 percent
  • Origin Energy Limited (via subsidiaries, Operator) - 67.0 percent

The Joint Venture partners in L1 are:

  • AWE Limited (via subsidiaries, Operator) - 50.0 percent
  • Origin Energy Limited (via subsidiaries) - 50.0 percent


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