AWE Limited informed that the Irwin-1 exploration well, located in the onshore Perth Basin, Western Australia, has intersected the top of the Dongara Sandstone at 3,146m, which is 41m high to prognosis, and has so far penetrated 120m of the primary target formation, the Dongara/ Wagina sandstones, with elevated gas shows observed.
The Irwin prospect straddles the EP320 (AWE 33%) and L1 (AWE 50%, Operator) boundary and the Irwin-1 drilling program is being operated by AWE under an agency agreement with joint venture partner, Origin Energy said in a statement.
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.
The Irwin-1 exploration well was spudded on 25 March 2015. The well is being drilled vertically to a planned total depth of 4,064m 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. The company stressed that the approved work program for the Irwin-1 exploration well does not include hydraulic fracture stimulation.
The Irwin-1 exploration well is located approximately 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.