Blowouts represent one of the most severe threats associated with exploration and exploitation of petroleum resources, involving the risk of losing human lives, environmental and economic values. In particular, today's focus on protection of the environment and the ambitions of the industry to operate safely in environmentally sensitive areas generates a need for improved cross disciplinary tools and work processes within blowout risk management. This paper will present a methodology aiming to form the foundation for a new standard for blowout risk assessment. Both details of the analysis method and its contributions to improving the risk management work process will be addressed. The new methodology combines knowledge from different technical disciplines by merging hydraulic flow modelling and different blowout duration models in a Monte Carlo simulation framework, and differs from traditional blowout evaluation methods both in terms of how to collect input data to the analysis and the way the final result is presented and communicated. This methodology introduces a common working platform for HSE engineers and the other disciplines involved in well planning, thus improving cross communication between different disciplines. The paper will present the building blocks of the methodology and illustrate its application on a case from the Norwegian Continental Shelf.

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