LP油田沉降罐过渡带原油破乳脱水实验研究OA北大核心CSTPCD

The crude oil in the transition zone of LP oilfield settlement tank contains colloidal FeS and other components that play an emulsifying role,which makes crude oil dehydration difficult and cannot meet the requirements of crude oil inlet electrodehydrator.The physical properties,crude oil composition and produced water composition of crude oil in the transition zone were analyzed,and the screening of FeS remover and demulsifier was optimized,and the demulsification effect and adaptability of the combined FeS remover and demulsifier were studied.The results show that the screened FeS remover BLJ-01 has a good dissolution effect on FeS,and the combination of 3%FeS remover BLJ-01 and 800 mg/L demulsifier X-75 can effectively remove FeS from crude oil in the sedimentation tank transition zone at 55℃,with the dehydration rate of crude oil in the sedimentation tank transition zone reachings 85.78%.BLJ-01 has strong adaptability with X-75,and the dehydration rate of crude oil in the transition zone of P2 joint station settlement tank with a water content of more than 40%can reach more than 80%.It can show excellent demulsification effect under weak acid or weak alkaline conditions,which is also suitable for demulsification and dehydration of crude oil in the transition zone of SJ station settlement tank,and can significantly reduce the amount of demulsifier.