Critical Energy Infrastructures can suffer different impacts from accidents and natural disasters which concern the whole energy system and specific functional aspects of Energy Security as well. A negative energy event -i.e. a strategic refinery blockade due to an accident- can provide useful experiences which demonstrate the connection among logistic efficiency, resilience and Energy Security. Spanish refinery Puertollano suffered an accident in year 2003 which stopped oil logistics in a significant part of the country. Military oil refined products logistics in Spain are managed by CLH oil products logistic company -operating in the framework of a Public-Private Partnership and civil-military cooperation model- and then this enterprise facilitated the implementation of a resilience measures aimed to guarantee the operation of oil products logistic chain in the affected area. Management of Puertollano refinery crisis in 2003 showed positive results for ensuring National Energy Security, market and business normal function, system stability and infrastructure re-adjustment. This crisis advanced criteria and lesson learned for Critical Energy Infrastructure Protection and business continuity planning.