Oil & Gas

Operated assets

Cormorant Alpha

Cormorant Alpha is a fixed installation serving as a manned drilling and production installation for the South Cormorant field in Block 211/26a in the East Shetland Basin of the Northern North Sea.

Facts

  • The installation is owned and operated by TAQA.
  • Field discovery: September 1972
  • Date of construction: May 1978
  • Location: 100 miles North East of Lerwick (approximately 310 miles North East of Aberdeen), in water depth 150m (492ft)
  • Personnel on board: The facilities are equipped for a maximum of 171 personnel.
  • Installation structure: four leg concrete gravity base structure with a steel box girder module support frame supporting two levels of modules.

Functions

  • Main function is to drill, produce, meter and pump oil and gas.
  • Cormorant Alpha also receives oil form the Brent C, North Alwyn and North Cormorant platforms as well as from the Pelican subsea tie-back.
  • Drilling, completion, workover and maintenance of oil producing and water injection wells drilled from the installation.
  • Production and metering of oil and gas from the installation, Pelican and UMC wells and the maintenance of reservoir pressure by injection of water. Associated gas is used as gas lift and fuel, with the excess being exported to Brent Alpha and the FLAGS line via the Western Leg gas pipeline.
  • Crude stabilisation facilities for oil imported from Brent System installations, and facilities for the depressurisation of the Western Leg gas line.
  • Pump station for the Brent System, importing oil from Brent (including Penguins), Dunlin (including Osprey and Merlin), Thistle, Murchison, Alwyn, North Cormorant, Tern (including Kestrel), and Eider (including Otter) and exporting oil to Sullom Voe Terminal in the Shetland Islands.
  • Communications centre for the East Shetland Basin microwave network and air traffic control for the coordination of helicopter movements in the area.

Connections

  • Connected to the installation is the Pelican subsea template located on the Pelican field. Also the Central Cormorant Underwater Manifold Centre (UMC) located on the Central Cormorant field.
  • Oil from the Cormorant Alpha platform is exported to the BP-operated terminal facilities located at Sullom Voe in the Shetland Islands via the Brent Pipeline System.
  • Gas form Cormorant Alpha also joins the Western Leg Gas Pipeline (WELGAS) link to the Far North Liquids and Associated Gas System (FLAGS).
Eider

Eider is a fixed installation serving as a manned production facility for the Eider Field, in Block 211/16a in the East Shetland Basin of the Northern North Sea.

Facts

  • The installation is owned and operated by TAQA.
  • Field discovery: May 1976.
  • Date of construction: installed in 1988. Production came on stream in November 1988.
  • Location: 114 miles North East of Lerwick (approximately 315 miles north north-east of Aberdeen and approximately 13km from North Cormorant) in water depth 157.5m (517ft).
  • Personnel on board: living quarters have accommodation for 73 persons. Levels 2 and 3 of the living quarters are designated as the Temporary Refuge (TR).
  • Installation structure: a four leg, eight column steel jacket sub-structure, supporting an Integrated Deck Structure (IDS), containing a wellbay, process bay and utilities bay.

The IDS itself supports a flare boom, a drilling derrick, drilling module and Living Quarters (LQ) with helideck.

Functions

  • Eider is an oil producing satellite of the North Cormorant installation.
  • Eider is designed to produce partially stabilised crude oil through a single stage separator train. The crude oil is exported to North Cormorant for further processing before entry into the Brent pipeline system. Separated gas is either used on the installation as fuel gas or is flared.

Connections

  • Oil and gas is exported to North Cormorant via a subsea pipeline before being exported via the Brent Oil Pipeline System to Sullom Voe in the Shetland Islands.
  • Crude oil is exported to North Cormorant via a 12-inch subsea pipeline. There is also a two-way 33kV subsea electrical power link between the two Installations.
  • Injection water is imported, via a 16-inch subsea pipeline, from the Tern Alpha Installation, located 16km to the South West and distributed to Otter and Eider.
North Cormorant

North Cormorant is a fixed installation serving as a manned drilling and production installation for the North Cormorant field in Block 211/21 in the East Shetland Basin of the Northern North Sea.

Facts

  • The installation is owned and operated by TAQA.
  • Field discovery: August 1974.
  • Date of construction: 1980.
  • Location: approximately 110 miles north-east of Lerwick in the Shetland Islands ( 315 miles North North East of Aberdeen), in water 161m (528ft) deep.
  • Personnel on board: The facilities are equipped for a maximum of up to 214 personnel.
  • Installation structure: The installation consists of an eight-legged steel jacket sub-structure, anchored by piles to the seabed. The Module Support Frame (MSF), which is attached to the jacket, acts as a base support for two levels of modules.

Functions

  • The function of North Cormorant is to drill, produce, meter and pump oil and gas.

Connections

  • Oil and gas is imported from Eider (13km away) before being separated and processed via the North Cormorant process facilities. The oil is then routed to Cormorant Alpha for onward transmission through the Brent Pipeline System to Sullom Voe.
  • Crude oil from Tern is also imported and then exported to Cormorant Alpha.
  • Gas is imported from Tern and exported through the Western Leg via Brent A and the FLAGS pipeline to St Fergus Terminal.

The following pipelines are connected to the installation:

  • 16-inch oil import from Tern Alpha;
  • 12-inch two phase oil import from Eider;
  • 20-inch oil export via Cormorant Alpha into the Brent system;
  • 10-inch gas export into the Western Leg gas export pipeline;
  • 8-inch gas to/from Tern Alpha.
  • The 12-inch oil import from Eider changed to two-phase flow due to Otter. Now, any surplus gas from Eider-Otter is injected into this pipeline on Eider for processing on North Cormorant.
Tern Alpha

Tern Alpha is a fixed installation serving as a manned drilling and production installation for the Tern field in block 210/25 in the East Shetland Basin of the northern North Sea. It also serves as a production facility for the Hudson and Kestrel fields.

Facts

  • The installation is owned and operated by TAQA.
  • Field discovery: April 1975.
  • Date of construction: 1988.
  • Location: Tern lies 105 miles North East of Lerwick in the Shetland Islands (approximately 310 miles north east of Aberdeen), in water 167m (548ft) deep, with the Hudson field approximately 6.5 miles West of Tern.
  • Personnel on board: The facilities are equipped for up to 175 personnel.
  • Installation structure: The installation consists of a 4-legged steel jacket sub-structure, anchored by piles to the seabed. The Module Support Frame (MSF), which is an 8-legged structure attached in one piece to the jacket, acts as a base support for two levels of modules.

Functions

  • The installation provides production for the Tern and Kestrel fields and drilling for the Tern field.
  • It provides production, gas lift and water injection facilities for the Hudson field and water injection facilities for the Eider and Kestrel fields.

Connections

The Kestrel field is a subsea satellite development tied back to Tern. It became operational in Q3 2001 and comprises of two production wells and one water injection well. Also tied back to Tern are the Hudson field, operated by Dana and TAQA’s Falcon field.

The following hydrocarbon pipelines are connected to the installation:

  • 16-inch oil export to North Cormorant.
  • 8-inch gas import/export to North Cormorant.
  • 2 x 10-inch oil production from Hudson.
  • 8-inch oil production/test from Hudson.
  • 6-inch gas lift to Hudson.
  • 8-inch production line from Kestrel.
  • 4-inch gas lift line from Tern to Kestrel.
Harding

Harding is a jack-up production unit serving as a manned production facility for the Harding Field, in Block 9/23b, 320km NorthEast of Aberdeen in the Central North Sea.

Facts

  • TAQA has a 70% interest in the installation and is the operator. The other partner is Maersk who holds 30%.
  • Field discovery: February 1987.
  • The Harding oil field covers an area of approximately 20 square kilometres.
  • Reservoirs: Harding Central, Harding South, Harding South East and Harding North and North east. Morrone field is a separate accumulation to the South of Harding in 9/23b.
  • Date of construction: Construction started in 1993 and production start-up was in 1996. Location: 320km North East of Aberdeen in the Central North Sea, in water depth 110m.
  • Personnel on board: The living quarters have accommodation for 119 persons. The average POB number is 110.
  • Installation structure: Harding is a heavy-duty jack-up production unit, resting on a gravity base storage tank capable of holding 600,000 barrels of oil.

Functions

  • Harding is a production unit for the Harding field.
  • Harding has 16 oil production wells, three water injection wells, one gas injection well and two aquifer lift wells.

Connections

Oil from Harding is exported via a 24-inch diameter oil export pipeline to submerged tanker loading system.

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Principal Control & Instrument Engineer (Rotating Machinery)

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UK NEWS

29 Dec 2015

TAQA announces first oil from Cladhan field

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