Don Field Decommissioning Programme (pdf, 7.8MB) null - BP

Don Field Decommissioning ProgrammeDON-BP-0011 IntroductionThis document presents the following two Decommissioning Programmes as one,which is permitted by the Department of Energy and Climate Change (DECC)Decommissioning Guidance Notes [6.1] guidelines:1. Subsea Equipment (Don Field manifold, wellheads and xmas trees).2. Pipelines, Flowlines and Umbilicals.Selection of the most suitable decommissioning option for the Don facilities was basedon thorough and comprehensive evaluations of the relevant decommissioning options,with particular consideration given to the following selection criteria: Technical (feasibility, complexity and risk) Safety (offshore and onshore hazards/risks) Environmental (ecosystem impacts, energy and waste) Social (effects on other users of the sea, eg shipping and fishing) Economics (costs and economic impact)Shortlisting and final selection of the best overall option were guided by an evaluation ofthese selection criteria, always with due regard to the OSPAR Decision 98/3 [6.2].Initially, a list of all feasible decommissioning options was compiled for each mainfacility. As the decommissioning studies progressed and more information was madeavailable for evaluation, the number of options was reduced to a shortlist from which thebest decommissioning option for the facility was selected. Where more than onedecommissioning option was shortlisted (ie pipelines and umbilicals), they wereevaluated on a systematic, qualitative and quantitative basis.The option selection for each main element of the Don facilities is described inParagraphs 2 and 3.2 Decommissioning Programme 1 - Subsea EquipmentThe following equipment will be removed to meet clean seabed requirements: All wellheads and xmas trees The Don manifoldRemoval and Disposal OptionsMay 2011 6-1