Breagh Development - RWE.com

Breagh Environmental Statement
Section 2 – Proposed Development
Figure 2-4 Schedule of activities
2010 2011
2012
Activity
20" Production pipeline installation and testing
3" MEG pipeline installation and testing
Optical fibre installation
Breagh A NUI Jacket transportation and installation
Breagh A NUI Topsides transportation and installation
Breagh A NUI hook-up and commissioning
Drilling
Onshore construction, commissioning and testing
Start-up and first gas
Production
O N D J F M A M J J A S O N D J F M A M J J A S O N D
2.5. Breagh Alpha NUI Design
During Phase 1 of the development a Normally Unmanned Installation (NUI) will be installed
over the Breagh Field. The NUI will be based on a SNS ‘minimum facilities’ design
(Figure 2-5) and will be a fixed steel platform with a jacket weight of approximately 2,000
tonnes and topsides weight of approximately 1,000 tonnes. The facilities will be capable of
at least 60 days and up to 100 days unattended operation 1
. The platform will be designed to
achieve a production uptime of 97% during unattended operation (not including planned
shut downs) and will be remotely controlled from shore via a fibre optic link (or telemetry
backup). The design life of the platform will be 20 years for the topsides and 40 years for
the jacket. It will contain the following facilities:
• Helideck (suitable for operation with the AW-139 aircraft);
• 10 tonne diesel driven crane;
• Corrosion and hydrate inhibitor injection package;
• Methanol storage and injection for hydrate control at well start-ups;
• Simple vent line for maintenance venting;
• Dual system, closed HP/LP hydraulic control package for topsides and subsurface
safety valves;
• Wellheads (hydraulically operated);
• 12 well slots;
• 7 production gas wells each with wet gas metering on flowlines;
• Gas production manifold;
• Up to seven risers (including future expansion):
o 20” pipeline to shore;
o 3” MEG pipeline from shore and future 3” from Breagh B;
o Future pipeline from Breagh B;
o Possible future pipeline to Breagh B;
o Two 8” pipelines for third party gas.
• Permanent automatic pig launcher;
• Communication links with the shore;
• Lifeboat, life rafts and safety equipment;
• Equipment Room;
• Battery room;
• Emergency Overnight Accommodation for 12 people;
1 This is the maximum planned period of autonomy. In practice it is likely that visits will be
undertaken every 6-8 weeks for several days at a time to carry out planned maintenance.
2-8
Project Activities
Production