河南超稠油乳化降黏研究

Study on Reducing Viscosity of Henan Extra-Heavy Oil by Emulsifying

凡江丽 吴本芳 李 颖 徐承中 张秀瑾

FAN Jiang-Li WU Ben-Fang LI Ying XU Cheng-Zhong ZHANG Xiu-Jin

针对河南油田超稠油黏度高，流动性差，开采和输送困难等现状，本文展开对河南油田超稠油的乳化降黏研究。得到优化的复合降黏剂F2配方，其中，乳化降黏剂主剂RA-1、稳定剂聚丙烯酰胺、助剂碱质量比为1:0.25:0.36，在F2总加剂量为0.483%（占原油乳状液的质量百分率），乳化温度70℃，油水质量比为7:3下，可以制得均匀、稳定的O/W型超稠油乳状液，超稠油的黏度由240 Pa·s（50℃）降到其乳状液的42.8 mPa·s（50℃），降黏率高达99.98%。文中同时对降黏机理进行了探讨。

According to the problems of high viscosity, poor liquidity and difficulties in exploitation and transportation of Henan extra-heavy oil, the research on reducing viscosity of extra-heavy oil in Henan oilfield by emulsifying was carried out. The optimized composite reducing viscosity agent F2 comprised main agent RA-1, stabilizer ?polyacrylamide and additive alkali at the mass ratio of 1:0.25:0.36. When the dosage of the F2 was 0.483% in the emulsion and the oil to water mass ratio was 7:3, the stable O/W emulsion was obtained at the temperature of 70℃. At the temperature of 50℃, after emulsified, the viscosity of the extra-heavy oil (240 Pa·s) could reduce to 42.8 mPa·s(50℃), and the viscosity reducing rate was up to 99.98%. In addition, the mechanism of viscosity reduction by emulsifying was studied.