This training will provide an overview of the methods for quantitative environmental risk analysis (MIRA) and oil spill contingency analysis. The methods are in line with the existing industry standards and guidelines for Norwegian Continental Shelf.
Oil spill modelling with OSCAR
SINTEFs OSCAR is the leading oil drift model used to predict fate and distribution of an oil spill on Norwegian sector. The course will cover the basics of the model including weathering of oil and surface and subsurface releases. In addition, an overview of which input data (environmental and other) required for optimal results will be presented. Both single spill scenarios and stochastic scenarios will be covered. The results from the oil drift modelling with OSCAR are used as input in both the environmental risk- and oil spill contingency analysis. The course will further present the way the results are used in the analyses and highlight important impacts.
Environmental risk analysis (MIRA)
MIRA is the Norwegian industry standard for assessing environmental risk of oil spills from petroleum activities such as exploration drillings and field developments. The method combines results from the oil spill modelling with distribution data for environmental resources like seabirds, marine mammals, fish and shoreline habitats. The result is a quantitative measure of the environmental consequences for the activity. The environmental risk is established by combining the probability for the spill to happen with the potential environmental consequences.
Oil spill contingency analysis with response modelling
The Oil Spill Contingency Analyses (OSCA) aim to provide information to quantify the amount of oil spill preparedness resources required for an offshore activity. The method is based on Norsk Olje og Gass' guideline for environmental preparedness analyses from 2013. The course will give an introduction to the industrial guidelines and framework for the OSCA methodology and describe required input data and the selection of Defined Situations of Hazard and Accident (DSHAs). Further, the analysis methodology will be demonstrated in a case study, using OSCAR. Relevant examples will be presented and discussed.
The course is aimed at HSE/environmental leads in operating companies on the Norwegian Continental Shelf, those responsible for/or working with these subjects in addition to authorities working with relevant issues.