Synthesis and performance evaluation of polyether demulsifier on aged oil
Author of the article:DAI Xuanrui1 , JIA Xinlei1 , WANG Ji3 , GENG Xiaoheng2 , GUO Haiying2 , WEI Lixin1
Author's Workplace：1. School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang, 163318, China; 2. School of Chemical Engineering and Safety, Binzhou University, Binzhou, Shandong, 256603, China; 3. Transportation Sales Branch, PetroChina Daqing Oilfield Company, Daqing, Heilongjiang, 163411, China
Key Words：Aged oil; Polyether demulsifier; Demulsification dehydration; Performance evaluation; Modified
Abstract：
In order to overcome the difficulties in aged oil
treatment in Liaohe oilfield, namely its demulsification and dehydration, the
Initiator was synthesized using phenol, ethylene glycol, hydrogen chloride,
formaldehyde and triethylenetetramine. The Initiator was then polymerized with
ethylene oxide and propylene oxide to form a polyether demulsifier, and
modified with benzyl chloride or 2,6-toluene diisocyanate to obtain a modified
aged oil polyether demulsifier. In this study, the cloud point and HLB value of
the polyether demulsifier were analyzed, and the dehydration experiment of aged
oil in Liaohe oilfield was carried out. The results showed that the water-soluble
modified aged oil demulsifier has the best demulsification effect. The water-soluble
modified aged oil demulsifier WLJEP5 had a demulsification rate of 95.72% at 85 ℃, which is 8% higher than that of the existing aged oil demulsifier
used in Liaohe oilfield. This paper provides valuable reference for improving
the demulsification efficiency of aged oil and overcoming challenges such as
difficulties in its dehydration.