AWE Limited, operator of the L1/L2 joint venture with Origin Energy, said that it had commenced the flow testing program for the Waitsia-1 well to further appraise the conventional Waitsia gas discovery in the onshore Perth Basin, Western Australia.
The testing program is designed to determine well deliverability from two conventional reservoir zones and to collect gas samples for compositional analysis, the company said in a statement.
The first zone being flow tested is the deeper High Cliff Sandstone, where a 23.5 metre interval (3,382 – 3,405.5 metres) has been perforated.
During the well clean-up operations, the well flowed gas at an average rate of 24.7 mmscf/d, constrained by tubing size, on a 60/64 inch choke at ~1330 psig flowing well head pressure over a 1 hour period.
The Waitsia-1 well will now be shut in for a brief pressure build-up survey prior to a series of flow tests at various choke settings, rates and well head pressures.
Following completion of testing on the High Cliff Sandstone, it is planned to set a plug to isolate the lower interval prior to commencing testing of the Kingia Sandstone. A similar well test program will be conducted on a 15 metre interval (3,333 – 3,348 metres) in the Kingia Formation.
The testing program is expected to be completed by the end of November.
The Waitsia-1 appraisal well is located on agricultural land approximately 3 km east of the Senecio-3 well and 17 km east of Dongara, Western Australia.