Australia: Karoon Gas Updates on Browse Basin Drilling Progress

  • Business & Finance

Karoon Gas Australia Ltd advises that at 08:00 hours (WST) today, the well was ready to make up the 12-1/4” bottom-hole drilling assembly prior to running in the hole to drill ahead.

Since the last report a 36” hole was drilled, the conductor was run and cemented at 572 m, a 17-1/2” hole was drilled, the 13-3/8” surface casing was cemented at 2822 m and the BOP and marine riser were run and pressure tested.

The Transocean Legend semi-submersible rig is drilling the exploration well, which is operated by ConocoPhillips.

ConocoPhillips is the operator of the jointly held WA-314-P, WA-315-P and WA-398-P Browse Basin permits containing the previously announced Poseidon and Kronos gas discoveries. Karoon Gas Australia Ltd holds 40% of the permit WA-315-P and WA-398-P, and 90% of permit WA-314-P.

Boreas-1 is located approximately 4 kilometres south of Poseidon-1 in WA-315-P on a large tilted fault block which is part of the of the north-east trending structural high of the greater Poseidon structure. The objective of the well is to test the  extent, presence and quality of reservoirs within the Boreas-1 fault block.

The exploration program, operated by ConocoPhillips, plans to utilise the Transocean Legend semi-submersible rig for the entire campaign and is expected to continue through 2013.

A minimum of five wells will be drilled during the exploration program. The principal objective of the exploration program is to better define the size and quality of the hydrocarbon accumulations within the exploration permits which contain the greater Poseidon trend.   The second well, Zephyros-1, is located in permit WA-398-P on a large tilted fault block approximately 8 kilometres south west of Kronos-1 discovery location. The third well, Proteus-1, is located in WA-398-P on a large tilted fault block approximately 14 kilometres south east of the Poseidon-1 discovery location. Additional well locations for the remainder of the program will be announced as they obtain joint venture approval.

Source: Karoon Gas Australia, April 24, 2012;


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