The Rosebank Development Project in Block 213 is located in 1,200 meters of water in the harsh environmental conditions West of Shetland. Rosebank has proven reserves of some 250 million boe.
The Rosebank field will be developed by a FPSO and associated riser system. Oil will be exported via CALM Buoy and shuttle tanker and the sweet gas will be exported via a 220km 24" gas export pipeline tying into the new Shetland Islands Regional Gas Export (SIRGE) pipeline which ties-into the Frigg UK A pipeline (FUKA).
EPConsult Energies (EPEn) was selected to prepare a Shipping Risk Assessment for the Rosebank Gas Export Pipeline (GEP), to be performed in parallel with the Pipeline FEED Engineering, performed by JP Kenny. The quantitative risk analysis (QRA) for the gas export pipeline due to shipping hazards was performed on the basis of a hazard identification study (HAZID). Credible shipping hazards included sinking ships, dragging anchors and dropped objects were studied in detail. The base risk assessment was established along the full length of the pipeline including the pipeline end terminations (PLET) and tie-in spools. Where risks were found to exceed the risk acceptance criteria, risk reduction measures (RRM) were identified and, where practical, recommended for implementation to ensure that the risks were reduced to as low as reasonably practicable (ALARP). Sensitivity analyses were performed in order to study the effects of increased shipping in and around the area of the GEP.