Abstract: Low pressure gas compressor is a key equipment for low-pressure gas recovery. With the increase of processing gas volume， severe emulsification of compressor lubricating oil occurs， which affects the stable operation of the equipment. Combined the current low-pressure gas processing parameters and equipment structure of the processing platform to analyze in depth the causes of lubricating oil emulsification in low-pressure gas compressors. Through on-site sampling and data integration，it was found that the reason for oil emulsification is the high water content in the low-pressure gas during the process. Based on this， further research was conducted on the factors causing high water content in the low-pressure gas. By taking measures such as reducing the amount of low-pressure gas recovery， increasing the processing temperature， adding defoamer， and lowering the liquid level of the scrubbing tank，the emulsification of lubricating oil was effectively reduced. The next maintenance plan was proposed， providing reference for the maintenance;of lubricating oil emulsification faults in offshore low-pressure compressors.

Key words: low pressure gas, lubricating oil, emulsification