Comet Ridge Provides Update on Mahalo 7 Well in ATP 337P in Queensland
Coal seam gas explorer and developer Comet Ridge Limited provided Friday an operational update on the progress of the Mahalo 7 horizontal surface to in-seam well that was spud Thursday evening, Nov. 6 in the ATP 337P Mahalo Block in Queensland’s Bowen Basin, Australia.
After the intermediate hole section was drilled to 1,007 feet (307 meters) and 7 inch intermediate casing was set (with the hole angle just short of horizontal at that point), drilling of the 6.125 inch production hole section was commenced. This horizontal hole section has now proceeded through approximately 1,181 feet (360 meters) of coal reservoir and the intercept with the Mahalo 6 vertical well occurred yesterday.
Drilling conditions have been good and subsequently a further 160 foot (49 meter) section of horizontal wellbore was drilled past the intercept well before the well drilling was terminated at the total measured depth of 2,542 feet (775 meters). It is currently anticipated that the rig will be released from the well pad sometime on Saturday Nov. 15. This Mahalo 7 surface to in-seam horizontal well has been designed to maximize the use of current reservoir data and has been positioned inside the current pilot wells. It was drilled past the Mahalo 3 vertical well, on the path to intersect the Mahalo 6 vertical well. The Mahalo 6 well will be utilized as the production well to lift the water and gas from the Mahalo 7 horizontal well.
This coal is at a depth of approximately 754 feet (230 meters) with a coal seam thickness of approximately 26 feet (8 meters). A smaller service rig will be utilised to re-install the pump in the Mahalo 6 production well with this planned to occur shortly.
Mahalo 6 is currently set up as a production well, with flowlines, metering and separation facilities at surface, and use
of this well as the intersect well is therefore cost effective for the Joint Venture and will enable timely recommencement of dewatering following completion of drilling.
The Mahalo block sits approximately 149 miles (240 kilometers) west of Gladstone in central Queensland and the Joint Venture has been operating two production pilot schemes at the Mahalo Field Pilot and Mira Field Pilot, since the first half of 2013. Comet Ridge has recently received its first independent reserves certification for the Mahalo Block, which was detailed in a release to the ASX Aug. 29.
Equity participants in ATP 337P Mahalo are Comet Ridge Mahalo Pty Ltd (40 percent), Australia Pacific LNG Pty
Ltd (30 percent) and Santos QNT Pty Ltd (30 percent). Santos QNT Pty Ltd is defined as the Exploration Operator under the current Joint Venture Operating Agreement and has the responsibility for drilling the Mahalo 7 horizontal well.
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