Waitsia-02, Waitsia-03 and Waitsia-04
Waitsia-02, Waitsia-03 and Waitsia-04 were drilled as appraisal wells.
MEPAU’s predecessor AWE tested flow rates in order to assess the economic viability of the Waitsia gas field.
The results were better than expected, with all three wells flowing faster than Waitsia-01 and Senecio-03, the Stage 1A production wells.
The Waitsia-03 well is located approximately 20 km east-south-east of Dongara, Western Australia, and 11 km south of Waitsia-01.
Waitsia-03 was the first to be flow tested, on 18 October 2017.
Gas flowed at 50 MMscf/d (50 million standard cubic feet per day). This was another extremely positive result and demonstrated once more the outstanding conventional reservoir properties of the Waitsia gas field. This result also provided further confidence in the field deliverability while moving towards Final Investment Decision for Stage 2.
The Waitsia-02 well is located approximately 16 km east-south-east of Dongara and 6 km south-south-west of Waitsia-01.
Waitsia-02 was flow tested on 7 November 2017.
Gas flowed at 38.7 MMscf/d (38.7 million standard cubic feet per day). The flow test confirmed that the Kingia Sandstone at Waitsia-02 shares all the outstanding conventional reservoir properties observed at other wells in the field, particularly high porosity and low total inerts. Overall, these results underline the laterally extensive nature of the excellent Waitsia reservoir system.
After the flow test, Waitsia-02 was suspended. As part of the Stage 1 Expansion project, infrastructure was installed and it is now a production well.
The Waitsia-04 appraisal well is located approximately 18 km south-east of Dongara and 3 km north-northeast of Waitsia-03.
Waitsia-04 was the last to be flow tested, on 20 November 2017.
Gas flowed at a massive 90 MMscf/d (90 million standard cubic feet per day).
This is the highest flow rate ever recorded from the Waitsia gas field and one of the highest rates recorded onshore in Australia.
Overall, these flow test results exceeded pre-test expectations and reinforced plans for the staged Waitsia gas field development, particularly because a low number of wells would be initially required and the design of facilities would be straightforward.