AWE Limited, Operator of the L1/L2 joint venture, disclosed Wednesday 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 first zone being flow tested is the deeper High Cliff Sandstone, where a 77 foot or 23.5 meter interval (11,096 - 11,173 feet or 3,382 - 3,405.5 meters) has been perforated.
Well clean-up operations commenced at approximately 15:00 hours AWST (Australian Western Standard Time) Monday Oct. 5. On Tuesday Oct. 6, at the end of a 7 hour clean up period, the well flowed gas at an average rate of 24.7 million standard cubic feet per day (MMscf/d), constrained by tubing size, on a 60/64 inch choke at ~1,330 pounds per square inch gauge (psig) flowing well head pressure over a 1 hour period.
AWE’s Managing Director, Bruce Clement, said:
“This is an excellent result and confirms the production potential of the conventional High Cliff Sandstone in the field. We now have two successful well tests at Senecio-3 and Waitsia-1, and we are moving forward confidently with our plans for the first stage of development”.
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 49 foot or 15 meter interval (10,935 - 10,984 feet or 3,333 - 3,348 meters) 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 1.8 miles (3 kilometers) east of the Senecio-3 well and 10.5 miles (17 kilometers) east of Dongara, Western Australia.
The Joint Venture partners in L1/L2 are:
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