Australia-based upstream AWE said Tuesday it hit multiple pay zones including a “significant gas discovery” at its Senecio-3 appraisal well in Western Australia.
The well is located in the Perth Basin in the AWE operated permit L1/L2. Australia-based Origin Energy owns a 50 percent stake in the license.
AWE placed best estimates of contingent resources for the well at 40 to 130 billion cubic feet of gas gross based on the well data and existing 3D seismic.
The company said reservoirs at the primary target were moderate to good quality.
The well encountered its primary target, the Dongara/Wagina formation, from 8,645 feet to 9,051 feet.
Multiple hydrocarbon bearing formations were also encountered at the well’s secondary targets.
The company made a significant gas discovery in two sandstone intervals below the well’s primary target.
AWE said the intervals, called Kingia and High Cliff sandstone, may contain a “substantially larger volume than the gas accumulation in the Dongara/Wagina.”
Wireline pressure data confirmed a gas gradient over the Kingia and High Cliff sandstone intervals.
The company said additional analysis is required before it estimates contingent resources for Kingia and High Cliff.
Senecio-3 was drilled to a total depth of about 11,056 feet.
AWE will not conduct hydraulic fracture stimulation on Senecio-3 at this stage.
Senecio-3 could be completed as a production well in a future field development, AWE said.
Core samples and log data from the Dongara/Wagina reservoir will be fully analyzed and evaluated prior to making a decision on field development.
The Senecio-3 appraisal well is located on agricultural land approximately 9 miles east of Dongara, Western Australia, and 4.3 miles from the AWE-operated Dongara gas plant.