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

AWE Limited disclosed Wednesday that as at 06:00 hours (6.00am) today AWST the Irwin-1 exploration well, located in the onshore Perth Basin, Western Australia, had completed a drill bit change and was at a measured depth of 12,631 feet (3,850 meters) and drilling ahead in an 8.5 inch hole to the planned total depth of 13,333 feet (4,064 meters).

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 is being drilled vertically to a planned total depth of 13,333 feet (4,064 meters) and is forecast to take a total of 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 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 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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