The Eastern Trough Area Project, commonly known as ETAP, is a network of nine smaller oil and gas fields in the Central North Sea covering an area up to 35 km in diameter. There are a total of nine different fields, six operated by BP and another three operated by Shell, and together, they are a rich mix of geology, chemistry, technology and equity arrangements.
Development
The ETAP complex was sanctioned for development in 1995 with first hydrocarbons produced in 1998. The original development included Marnock, Mungo, Monan and Machar from BP and Heron, Egret, Skua from Shell. In 2002, BP brought Mirren and Madoes on stream. With these nine fields, the total reserves of ETAP are approximately 490 Moilbbl of oil, 35 Moilbbl of natural gas condensate and 2 Gcuft of natural gas.
A single central processing facility (CPF) sits over the Marnock field and serves as a hub for all production and operations of the asset including all processing and export and a base for expedition to the Mungo NUI. The CPF consists of separate platforms for operations and accommodation linked by two 60 m bridges. The Processing, drilling and Riser platform (PdR), contains the process plant and the export lines, a riser area to receive production fluids from the other ETAP fields and the wellheads of Marnock. The Quarters and Utilities platform (QU) provides accommodation for up to 157 personnel operating this platform or travelling onwards to the Mungo NUI. This partitioning of accommodation and operations into two platforms, adds an extra element of safety, a particular concern for the designers coming only a few years after the Cullen report on the Piper Alpha disaster.
Liquids are exported to Kinneil at Grangemouth through the Forties pipeline system
ETAP fields
Marnock
The Marnock field is located in UKCS block 22/24 and is named after Saint Marnock. It is a high pressure, high temperature gas condensate field with initial reservoir pressure of 9000psi. Estimated recoverable reserves are 600 billion scf and 50 Moilbbl of condensate. Marnock produces directly to surface wellheads on the CPF. It is operated by BP in partnership with Shell, Esso and Agip. The holdings in the Marnock field are as follows: BP = 73%, Esso = 13.5%, Shell = 13.5%.[1]
Mungo
The Mungo field is located in UKCS block 23/16 and is named after Saint Mungo. It is an oilfield with a natural gas cap.
Helicopter crash
On 18 February 2009, a Super Puma Helicopter ditched in the sea whilst approaching ETAP. All 18 passengers and crew were rescued. Bernard Looney, a President of BP's North Sea business based in Aberdeen, credited their Project Jigsaw with the safe, quick and efficient recovery of the 16 passengers and 2 crew. Project Jigsaw uses locator beacons on all helicopters, standby vessels and fast rescue craft, connected to a computerised system located in Aberdeen. This way locations of all rescue craft and their response time are always known to staff in the BP control centre. In addition all staff are supplied with wristwatch personal locator beacons (WWPLB) that automatically activate when immersed in water.
See also
- Oil industry
- Oil fields operated by BP
- North Sea oil
External links
References
- Archived copy retrieved 2015-07-21^