Abstract
Aimed at the high water cut crude oil in Daqing Oilfield, polyether demulsifiers was synthesized indoor to investigate the dehydration effect of different initiator, catalyst, the mixture ratio of ethylene oxide and propylene oxide, block number of demulsifier on demulsifier. The results show that the polyether demulsifiers have high dehydration rate and out of the water of dehydration was clear. After using the polyether demulsifier, the crude oil demulsification temperature decreased from 55 °C to 40 °C and the average water cut of the crude oil is about 0.20%, it is reached the national crude oil external transport standard.
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