| 摘要: |
| 降凝剂可以用来改进原油的流变性能。合成了丙烯酸二十二酯-丙烯酰胺共聚物(PAA)降凝剂,考察了降凝 剂对原油流变性能的影响,并探讨了降凝剂的降凝机理。结果表明，降凝剂使原油的凝点和反常点降低、原油的牛 顿流体温度范围变宽，并且使非牛顿流体温度下的粘度减小,但是，牛顿流体温度范围内的粘度基本没有变化;在原 油的反常点以上,高速剪切对降凝剂的改性效果无明显的影响。在原油析蜡高峰区温度范围内高速剪切,将大大恶 化降凝剂的改性效果。降凝剂的加人使原油中的蜡晶颗粒形态发生变化,使得原油的凝点和粘度下降。 |
| 关键词: 降凝剂 全枯温曲线 高速剪切 蜡晶 |
| DOI： |
| 分类号: |
| 基金项目:“十五”国家科技攻关课题(2002BA312B-04) |
|
| Rheological properties evaluation of Shengli crude oil under the condition of adding pour point depressant |
|
XU Si-ping1,2,SONG Zhao-zheng3
|
|
(1.College of Petroleum Engineering in China University of Petroleum, Dongying 257061,Shandong Province，China;2. North Exploration Company, SINOPEC，Changchun 135000, China;3. State Key LaborcUory of Heavy Oil Processing，China University of Petroleum, Beijing 102249, China)
|
| Abstract: |
| Pour point depressants can be used to improve the rheology of waxy crude. The acrylate-acrylamide copolymers t PAA] were synthesized. The effect of pour point depressants on the ideological properties and the pour point depress mech- anism were investigated. The results show that pour point depressants can reduce the pour point and abnormal point of waxy crude, and broaden the temperature range of Newtonian fluid of waxy crude, lower the viscosity of non-Newtonian fluid of yfsxy crude greatly, while the pour point depressant has little effect on the viscosity at the temperature of Newtonian fluid. When temperature is above the abnormal point of crude，the high-rate shear has little effect on the modification effect of pour point depressants. Whereas, at a temperature range where 狂 lot of wax is precipitating, high-rate shear will greatly reduce the modification effect of pour point depressants. Pour point depressants can make the wax crystals become smaller, so the pour point and viscosity of crude can be depressed. |
| Key words: pour point depressant temperature-viscosity curve high-rate shear wax crystal |
