Abstract: Quantified risk analysis (QRA), fire and explosion analysis (FEA) and exhaust gas dispersion analysis are gradually widespreadly used to identify and evaluate the leakage, dispersion, fire and explosion risk of oil and gas and fatality risk of personnel on offshore facilities. Based on these studies, the safety engineer and owner can make decision and determine appropriate safety critical elements (SCE) required for the hazard. We review the successful application experience of QRA, FEA and exhaust gas dispersion analysis in the basic design phase of offshore gas field development project. For platform A in the South China Sea, the application objective and status, the effect achieved, and the existing problems are described. Especially, feasible safety solutions such as passive fire protection material and blast wall are introduced. This research can provide reference for other similar projects.