1989/90 and employs two drill centres, one for production (with 8 subsea trees) and one for water injection (with 4 subsea trees). The drill centres are connected to the platform via two back to back flowline bundles containing 2 off 8" production flowlines and a 10" water injection line. Subsea trees and the manifolds were supplied by Cameron Oil Tools (now OneSubsea). Subsea control system was supplied by Kvaerner FSSL (now Aker solutions). The Merlin field was discovered in 1998 and was initially developed as a low cost CRINE field (Cost Reduction In the New Era) utilising the discovery well recompleted as a subsea producer. The Merlin drill centre was progressively expanded to 3 subsea production wells and a single water injector. The flowlines from Merlin comprise 8" water injection and production lines. These tie into the Osprey riser system at Dunlin. Merlin subsea controls tie in via a crossover manifold adjacent to Dunlin into the Osprey umbilical system. Flexible flowlines were installed for water injection service on Merlin and Osprey in 2002. Osprey and Merlin produce from the same Brent sequence geology as the main Dunlin Field. Pipeline Infrastructure Fairfield installed a 4" fuel gas import line from the Thistle platform in 2012 to provide fuel for the platform power generation plant. The field had become gas deficient (insufficient associated gas being produced as a by product of oil production) under Shell. In an attempt to mitigate this Shell had installed a 33KVa power import cable between Dunlin and Brent C in 2002. The Brent sequence fields rely on water injection to maintain production and Dunlin had an installed water injection plant capable of delivering 250,000 bwpd supplied by 5 electrically powered water injection pumps. Dunlin acts as a pipeline node on the Brent system and provides connection point for the 16" export line from the Enquest operated Thistle and Don Fields and the 16" line from the Murchison field (the latter in the process of being decommissioned by Canadian Natural Resources International - CNRI - June 2015) Decommissioning In May 2015, Fairfield Energy has announced plans to decommission its Dunlin Alpha platform in the North Sea. The decommissioning process, which requires regulatory approvals, is expected to cost about £400 million. Dunlin has been cited as an example of the impact a decommissioning decision has impacting surrounding infrastructure as per the 2014 Wood MER (Maximising Economic Recovery) Report -