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Comet Ridge plugs low productivity Macdonald 6P well
16 July 2010 - Brisbane-based Comet Ridge Ltd has plugged and abandoned one of its intended coal seam gas pilot wells, Macdonald 6P near Greymouth, after finding lower productivity than expected from a deep coal seam.
Sources: Comet Ridge and Lindsay Clark
Comet Ridge says the well encountered 5.4 m of gassy coal in the Brunner Formation but a drillstem test indicated that permeability was lower than expected and the well would not produce at commercial rates.
The Macdonald 6P well reached a total depth of 822 m in the Petroleum Mining Permit 50100.
Comet Ridge managing director Tor McCaul, says the well had intersected the main coal seams deeper than expected. This was likely to be a significant contributing factor to the low productivity result.
While the level of permeability was disappointing, he was pleased that the well showed continued lateral continuity in the coal in the Brunner Formation in this area of the permit.
The rig has been released and geological data obtained from Macdonald 6P would be interpreted in detail to further refine the coal model in this area of the permit.
Comet Ridge in June completed and fitted for production testing its first New Zealand coal seam gas pilot well in Macdonald 4P well nearby. Pressure monitoring gauges have been installed on two nearby observation wells Macdonald 5C and RM 1.
