Anglia Gas Field Tender

First Production 1991Location Southern North Sea UKCessation of Production November 2015Scope Ithaca Energy is decommissioning the Anglia gas field infrastructure located in the Southern North Sea approximately 55km away from the UK mainland. Ithaca Energy is decommissioning the Anglia gas field infrastructure located in the Southern North Sea approximately 55km away from the UK mainland.The Anglia field infrastructure is co-owned by Ithaca Energy 44.64 Dana Petroleum 37.2 and Ineos UK SNS 18.15.The application for the cessation of production from the field was submitted to the Oil and Gas Authority OGA in November 2015 and was approved in May 2016.The Offshore Petroleum Regulator for Environment Decommissioning OPRED approved the decommissioning programme of the field in June 2020. The project has been outlined as a seven-year decommissioning plan to be implemented between 2020 and 2027.Petrex Developments developed the plan to clean the pipeline system as the first phase of the subsea facilities decommissioning programme in April 2019.Discovered in 1972 the Anglia gas field lies in UK Blocks 4818b and the export line traverses Blocks 4819 and 4820 at a water depth of approximately 27m. The decommissioning programme comprises the decommissioning of two field installations and four field pipelines.The Anglia field was initially developed with a three-legged fixed normally unattended installation NUI platform named Anglia A which supported six platform wells. The first production from the field started in 1991.Two additional subsea wells Anglia West B were added to the west of the Anglia A along with associated subsea equipment in 1993. The subsea production wells were tied back to the Anglia A platform via a 5km-long 8in-diameter infield concrete-coated steel production pipeline at a water depth of 22.5m and 31m respectively. The installations were used for the production and treatment of gas from the reservoir. The gas was transported to the Conoco Phillips Lincolnshire Offshore Gas Gathering System LOGGS facility via a 23.7km-long 12in-diameter steel production pipeline and then sent to the onshore Theddlethorpe Gas Terminal TGT for processing.The topsides and jacket of the platform weigh approximately 870t and 1088t respectively while the Anglia West B manifold weighs 110t. The subsea installations include manifold structures such as piles protection frame and control modules.Details of facilities to be decommissionedThe facilities that will be decommissioned under the programme include Anglia A platform Anglia West B manifold with the integrated protective structure six production wells at Anglia A two subsea production wells at Anglia West B and three subsea appraisal wells.The pipeline system to be decommissioned includes the 5km-long Anglia pipeline system connecting Anglia A to Anglia West B the 5km-long 6in multicore