塔河稠油地面热改质降黏中试研究

A Pilot Study on Thermal Upgrading of Heavy Oil in Tahe Oilfield

根据反应釜小试实验优化条件,确定了塔河稠油地面热改质降黏中试方案,在中试装置上对塔河稠油的热改质过程进行了考察,并与热改质小试实验进行了比较。结果表明,中试与小试减黏裂化生成油降黏率基本一致,均在97%以上,中试生焦率略高;注水虽可减少生焦(降至0.1%以内),但降黏改质效果差;综合稳定性及黏度分析,塔河稠油热改质4组中试条件中,400℃、80 min (不注水)工艺条件改质效果相对最优。

According to the optimized condition of the batch reactor test, the pilot test scheme of thermal upgrading of heavy oil in Tahe Oilfield was chosen. Thermal upgrading process of Tahe heavy oil was investigated in a pilot plant, and it was compared with the batch reactor test. The results show that the viscosity reduction rate of the produced oil from the pilot test is in agreement with that of the batch test, which is all above 97%, and the coke yield of the pilot test is slightly higher. The coke yield can be reduced to a tolerable minimum (less than 0.1%) by water injection. However, the effect of viscosity reduction rate is poor. Through comprehensive analysis and evaluation of oil stability and its viscosity, the process condition 400?C, 80 min (without water injection) is relatively optimal among the pilot tests.