ConocoPhillips begins gas flow from Boreas off W. Australia

ConocoPhillips and joint venture partner Karoon Gas Australia reported that the Boreas-1 wildcat well drilled in Browse basin permit WA-315-P offshore Western Australia has flowed natural gas at a stabilized rate of 30.2 MMcfd. The gas flowed through a 40/64-in. choke with 3,300 psi flowing wellhead pressure.

The zone tested is a 70-m perforated section of the Plover formation at 4,904-74 m below the rotary table.

The test will continue for 5 days, including shut-in periods, and will also involve downhole sampling of the reservoir fluids as well as production logging.

Boreas is part of the joint venture’s assessment of the overall deliverability of the primary reservoir underpinning the Greater Poseidon Trend in the region that contains an estimated contingent resource of 7 tcf of gas on a P50 basis.

ConocoPhillips is operator of the jointly held permits WA-314-P, 315-P, and 398-P, which contain the earlier Poseidon and Kronos gas discoveries. Boreas-1 is 4 km south of Poseidon-1 on a large tilted fault block, which itself is part of the northeast trending structural high of the greater Poseidon structure.

The well, drilled by semisubmersible rig Transocean Legend, is a test of the extent, presence, and quality of the reservoirs within the Boreas fault block.

All well data will be integrated into the existing data files containing the Poseidon and Kronos wells as well as the Poseidon 3D seismic results to further define the size and composition of the greater Poseidon trend.

Following the Boreas test program the Transocean Legend will drill Zephyros-1 and then Proteus-1.

Zephyros will evaluate the flank of a fault block 9 km west of Kronos-1. Proteus will be 15 km east of Zephyros to evaluate a fault block on the eastern flank of the greater Poseidon trend.

Two further wells are planned, but have yet to be named. The JV also has the option of another three wells in the program.

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