Miller Gas System
The Miller Gas System (MGS) was used to transport gas from the Miller Field in UKCS Blocks 16/7b and 16/8b to onshore reception facilities at St Fergus, and then onwards via an onshore landline to the Peterhead Power Station. Miller field ceased production in 2007 and no other fields have contracts for gas transportation through MGS.
The MGS Owners intend to preserve the MGS pipelines for future opportunities and invite enquiries from interested parties who may wish to purchase these pipelines.
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MGS was designed to transport export gas in the dense phase and is suitable for transporting a wide range of gas compositions, including those with high concentrations of CO2 and H2S. The 30-inch diameter trunk line has a capacity of around 1,200 mmscfd and was installed in 1991 between the Miller platform and St Fergus, a distance of 242 km.
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The Brae-Miller Link Line currently offers interconnectivity between the Brae B platform and MGS. This 16-inch pipeline is designed to accept similar gas to MGS and has a capacity of 380 mmscfd as a spurline to MGS. Current connection is via the Miller platform, but following Miller platform decommissioning, provision exists to make a subsea tie-in direct to MGS. For more information on the availability of the Brae-Miller Link Line please click here. The MGS sealine currently terminates at the |
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The 18km onshore landline to Peterhead Power Station is 26-inch diameter, insulated and has a capacity of 400mmscf/d. Gas is maintained in single phase. A small reception facility is installed at Peterhead to reduce gas pressure prior to consumption in the power station boilers and gas turbines. It is intended to decommission and remove the Peterhead reception facility. There is currently no connection to the National Transmission System (NTS) or other terminal processing facilities at St. Fergus although studies and discussions about such connections have previously taken place. BP operates the Miller platform, the MGS sealine, the Brae-Miller Link Line, the MGS landline and Peterhead reception facilities. Total operates the MRF. |
System schematic
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Capacity
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Miller Field ceased production in 2007 and no other gas is transported through MGS. The MGS 30¿ offshore pipeline (capacity 1,200 mmscfd) and 26¿ onshore pipeline (capacity 400 mmscfd) will be preserved for future opportunities. |
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The MGS sealine has subsea tees at the following locations: Blocks 16/7b, 16/7b, 15/15.
Each tee is sized at 12-inch and is fully rated for sour service with a design pressure of 175 bara. Two 12-inch valves are fitted to the branch with a double-block-and-bleed facility allowing a 3rd party to tie-in while the trunk line remains 'live'. The main bore of the tee piece has the same internal diameter as the trunkline and offers no restriction to pigging.
Protection against internal corrosion is given by means of inconel lining of the tee piece together with short lengths of the trunkline both upstream and downstream. The branch and 12-inch valves are also inconel lined. Each tee is fitted with a protection cover.
Pipeline Parameters:
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Contact
Brian Povey
BP Exploration Operating Company
1 Wellheads Avenue
Dyce
AB21 7PB
Tel 01224 835932
Email: brian.povey@uk.bp.com
Modified January 2009
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