Achieving an offshore platform design that guarantees safe and reliable production operations usually is a challenging objective considering the complexity of meeting all the needs of Engineering, HSE, Operations and matching that with the economic investments constraints. Improving the safety and reliability of an existing platform represents a much greater challenge since the selection and implementation of the improvements has to take into account the difficulties related to the execution of offshore works, limitations of the existing installations and the need of minimising the production shutdown. In addition, since the objective of the revamping is not simply de-bottlenecking, due to production increase usually associated with increased reserves, the profitability of the Project is more difficult to be assessed. This challenge was put forth to Eni E&P Projects Development Department by Petrobel request for the improvement of the existing Mediterranean offshore gas platforms originally designed with the RULE (Reliable Unattended Low Energy) concept. With a request covering a list of ten platforms, a systematic approach was developed in order to identify the effective major risks in each of the platforms. Each offshore installation was analysed with a standard process aimed at responding to the safety and operability requirements specific to each of the installation's operation and design. The paper presents the details of the methodology adopted on Petrobel Mediterranean Offshore platforms with the advantages, challenges and lessons learnt encountered in the implementation of the Safety Improvement process

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