Abstract
At the present time, in the oil and gas industries centers of operators training simulate situational problems likr alarm and pre-alarm events. Recent studies in this field allow us to consider only the most likely emergency scenarios. In order to identify unlikely and untypical situations the HAZOP-methodology is being used. Its usage is becoming problematic due to the significant growth of low-probability a fault tree eaves. In this paper we propose to use the automaton approach with the use of advanced automaton cuts for the effective use of failures models in practice, training of operators working in emergency situations. This process simulation approach will allow taking into account highly unlikely and untypical situations.