Abstract: In order to study the disaster caused by oil leakage from the upper module of Floating production, storage and unloading device(FPSO), the oil vapor diffusion model and the pool fire model were established to quantitatively study the damage law and damage range of oil vapor explosion and pool fire. Taking the oil leakage of a FPSO heating skid as an example, the results show that the oil vapor concentration is the largest at the source of the leakage, and there is a risk of explosion and pool fire when the vapor mass concentration is 0.23 kg/m3. At the same time, with the increase of the leakage time, the smaller the horizontal distance from the target to the center of the pool, the faster the thermal radiation flux will rise. The harm of vapor cloud explosion impact is greater.

Key words: FPSO, oil spill, vapor diffusion model, pool fire model