Karoon: Poseidon North-1 plug and abandonment underway
ConocoPhillips has reached the final depth at the Poseidon North-1 well, offshore Western Australia, Karoon Gas Australia has informed.
Since the 17 April 2014 Poseidon North-1 Progress Report, 9-5/8″ casing was run and cemented at 3,820 mRT. The 8-1/2″ hole was then drilled to the final well Total Depth of 5,288 mRT. Final Total Depth was reached at 15:00 WST on Monday 5th of May and was followed by a wireline logging programme.
Based on cuttings, mud gas and wireline log data, Karoon, which owns a share in the area, interprets that the Poseidon North-1 well intersected gas bearing sands of Jurassic age across a 20 metre gross, 12 metre net reservoir interval. However pressure data is inconclusive and sample analysis remains outstanding which is required to confirm the presence of mobile gas. The well will now be plugged and abandoned with no further evaluation planned. At 0600 WST on 13 May 2014, Poseidon North-1 plug and abandonment operations were underway.
Phase 2 Exploration Campaign Update
Following Poseidon North-1, the Browse Basin Phase 2 exploration drilling campaign has one remaining well to drill. The Joint Venture has approved the Pharos-1 well location in permit WA-398-P as the sixth and final well.
The sixth well, Pharos-1 will be located approximately 9 kilometres north east of Proteus-1 and will be a further test of the Proteus-Crown trend. Pharos will be targeting an extension of the discovery made at Proteus-1 which established excellent reservoir quality and condensate bearing gas in the Montara formation.
Pharos is a low risk exploration well with the potential to add considerable resource to any future Poseidon development.The exploration campaign, operated by ConocoPhillips, plans to utilise the Transocean Legend semi-submersible rig for the final well. The principal objective of the campaign is to better define the size and quality of the hydrocarbon resource within the exploration permits which contain the Greater Poseidon trend.
ConocoPhillips is the operator of the WA-315-P Browse Basin permit in which Karoon Gas Australia Ltd currently holds 40%.