Abstract: With the advancement of offshore oil and gas resource development, the safety management of newly built offshore drilling and production platforms has become crucial. After in-depth study of the International Association of Oil & Gas Producers calculation models and thorough consideration of the uniqueness of offshore oil and gas facilities, this research independently developed two advanced calculation toolkits: the Leakage Frequency Calculation Toolkit and the Transient Leakage Calculation Toolkit. These tools were used to conduct a detailed quantitative analysis of the fire risk on the newly designed offshore drilling and production platform. The study found that due to the complexity of oil and gas separation and medium-pressure and low-pressure compression system equipment, the leak frequency on the middle deck was the highest, primarily attributed to the layout of the oil and gas separation system and the medium-pressure and low-pressure compression system equipment on the middle deck. Building upon this analysis, numerical simulation methods were employed to quantitatively analyze the consequences of jet fires and pool fires, leading to innovative passive fire protection (PFP) recommendations based on the simulation results. These recommendations include precise delineation of PFP areas, enhancement of PFP material selection and standards, establishment of regular maintenance and inspection systems, comprehensive improvement of emergency response capabilities, and the introduction of innovative mechanisms for continuous improvement and risk assessment. These research findings provide important references for the design, construction, and improvement of the new platform, aiding in the reduction of fire risks from the source and enhancing the platform's intrinsic safety performance. Furthermore, they offer valuable insights for the design and construction of similar platforms.

Key words: newly-built offshore platform, fire and explosion, quantitative analysis, risk control, inherent safety