Affiliation: | (1) Dawn Oil Producing Works of Liaohe Field Branch of CNPC, 124109 Panjin, Liaoning, P.R. China;(2) Beijing East Heavy Oil Technical Development Ltd, 100081 Beijing, P.R. China;(3) Department of Chemistry, Liaoning University of Petroleum and Chemical Technology, 113001 Fushun, Liaoning, P.R. China; |