Risk control during operation of offshore petroleum installations

This paper presents a general methodology for the establishment of risk indicators that can be used as a tool for risk control during operation of offshore petroleum installations. The risk indicators established are based on the platform specific quantitative risk assessment (QRA). The set of risk indicators for one specific installation is presented along with test results. Seven out of nine risk indicators are regarded as appropriate with minor adjustments. The remaining two needs further analyses. The methodology presented in this paper is evaluated against comparable approaches both in offshore and nuclear industry. There are two distinct features of this methodology. The first is that it is truly risk-based with the intention of covering the total risk picture. The second is that the identification of the risk factors contributing most to the total risk is based on realistic changes in each factor assessed by the platform personnel, not a theoretically assumed change.