Woodside intends to further develop and produce hydrocarbons from the Pluto and the Xena gas fields in permit area WA-34-L as part of the Pluto and Xena Field Development Plan. To achieve this, Woodside plans to undertake the following key activities.
Key activities are as follows:
Development drilling, completions and testing (unloading) of four new wells (PLA06, PLA07, PLA08 and XNA02);
Tie-in to existing subsea infrastructure;
Pre-commissioning of the new subsea infrastructure; and
Contingent intervention, workover, sidetrack or re-drill of existing wells (PLA01, PLA02, PLA03, PLA04 and XNA01) and new wells (PLA06, PLA07, PLA08 and XNA02). Formation evaluation may include cores, wireline logging and vertical seismic profiling (VSP) as required.
Development wells will be drilled by either a semi-submersible drill rig/drillship that is moored or operates under DP, or a DP drillship, with associated support vessels. Drill cuttings generated during drilling of the top hole sections will be discharged at the seabed. For the bottom hole sections, once the marine riser has been installed, drill cuttings will be returned to the drill rig and discharged at the sea surface below the water line. Both water based muds (WBM) and non-water based muds (NWBM) will be used during the drilling activities associated with the Petroleum Activities Program. A drilling fluids system for the intervention, workover, sidetrack or re-drill of existing Pluto and Xena wells (PLA01, PLA02, PLA03, PLA04 and XNA01) is yet to be confirmed.
The Petroleum Activities Program is located in production licence WA-34-L in Commonwealth waters approximately 175 km north west of Dampier.
The proposed Petroleum Activities Program is scheduled to commence in 2015 with the drilling of PLA06 well taking approximately 60 days. A further three wells (PLA07, PLA08 and XNA02) will be drilled within the 5 year period1 of the EP. Each of these wells will also take approximately 60 days. Installation of subsea hardware and flowlines, and pre-commissioning will commence on completion of the drilling of PLA07 and PLA08 wells, and is expected to take a total of approximately 100 days. The schedule and timeframe may be subject to change due to operational requirements and external influences such as drill rig/drillship availability, weather conditions and oceanic conditions. The EP has risk assessed the drilling of the wells throughout the year (all seasons) to provide operational flexibility for the drill rig/drillship schedule changes and availability.
Note: This information has been extracted from the EP Summary. Please refer to the attached EP Summary for more information.
