NET ENVIRONMENTAL BENEFIT ANALYSIS BY APPLICATION OF GIS-A SYSTEMATIC APPROACH IN A REGION OF HIGH BIODIVERSITY AND INCREASING COMPLEXITY IN OIL PRODUCTION

ABSTRACT The Norwegian Continental Shelf (NCS) extends from latitude 56° to 71°. Along the 82,000 km coastline and offshore, biodiversity is high, with large populations of fish, seabirds and marine mammals. In terms of oil and gas production, there is an increasing diversity in technical structures, water depth, and oil types, as recovery proceeds to smaller reservoirs. This calls for a high degree of flexibility in oil spill response strategies. According to Norwegian regulations, alternative response strategies must be analysed in a standardized way, including Net Environmental Benefit Analyses (NEBA). For this purpose, a GIS based method has been developed for net environmental benefit analysis of different oil spill response options for the NCS. Through a GIS interface, the user can interactively select a release location, an oil type, and a month for the oil spill. A standard map is generated, showing areas where different oil response strategies pose a net environmental benefit, net environmental l...