Abstract: In order to solve the problems including the difficult oil collection and dehydration in storage tanks and the off-spec water content of oil delivered from Dalaoba Gas Gathering Station, the oil collection process was optimized and heat tracing process was added for slop oil tank to achieve rapid oil collection without affecting the production in the station. Appropriate demulsification agent was selected through crude oil demulsification experiment, and the oil mixture was reprocessed in the reboiler of condensate oil stabilization tower through process re-optimization. The joint use of appropriate agent and high temperature demulsification technology can improve the demulsification and dehydration effect of the oil mixture, send stable condensate oil into storage tanks, and deliver condensate oils from the tanks in time, thus ensuring the stable operation of units in the station.

Key words: process optimization, agent selection, joint use, dehydration effect improvement