An Integrated System for Risk Assessment of Drilling Operations in Oil and Gas Wells

摘要

In this paper, a general, hierarchical, structured and flexible drilling operation risk assessment system (DORA) is presented. The model, which is presented in this paper, is generated form the operator’s point of view and it is applicable for different wells in a range form wild cat to reentry types. In order to completely define the risk assessment system, its operation model is developed, the tools and methods for each phase are specified and the inputs and outputs are determined. The developed model has four main phases of beginning, preliminary risk analysis, secondary risk analysis and support. The inter-related position of these phases and their sub-phases with respect to the drilling operation steps, are also specified.