用旋转粘度计法测定原油溶蜡点

Determining Crude's Dissolved Wax Point by Using Rotary Viscosimeter

原油溶蜡点是指原油在升温过程中蜡晶全部溶解的最低温度，其数值通常高于原油的析蜡点。对原油进行热处理或加降凝剂改善其低温流动性时，用原油溶蜡点数据确定所需的最低加热温度比用析蜡点数据更准确可靠。用旋转粘度计法测定原油溶蜡点是可行的。采用这种方法测定了大庆油田几种典型原油的溶蜡点和析蜡点，结果发现溶蜡点温度比析蜡点温度高出１１－１８℃。另外发现，当热处理温度低于原油溶蜡点时基本上无降凝效果。要获得好的热处理效果，热处理温度应高于原油的溶蜡点。

Using this method determining the dissolved wax points and the separating out wax points of several typical crude of Daqing oilfield,results show that the temperature of dissolved wax point is 11 - 18℃ higher than the separating out wax Point temperature and when heat treatment temperature lower than crude's disslolved wax point there were basi- cally no decreasing viscosity effect. So the temperature of heat treatment should higher than the crude's dissolve wax point.