Abstract: In view of the frequent ignition failure of the inert gas generator caused by high ignition oil pressure during the operation of the FPSO in the South China Sea oilfield,the systematic cause analysis was carried out. The fuel oil circuit system of the inert gas generator was reconstructed to realize the adjustable ignition oil pressure. After the reconstruction,the failure rate of inert gas ignition is reduced effectively,which ensures the safe and stable operation of the inert gas generator.

Key words: FPSO, inert gas generator, ignition failure, fuel oil circuit