管输原油饱和蒸气压实验测定与模拟预测.

To efficiently transport pipeline crude oils, obtaining the saturated vapor pressure of oils is very important. In this work, we sampled five pipeline crude oils from one domestic oilfield, and then by using the reference method, the saturated vapor pressure of these five oils were measured under the temperatures of 37.8 ℃,45.0 ℃,50.0 ℃,55.0 ℃ and 60.0 ℃. The experimental results showed that the saturated vapor pressure of pipeline crude oils increased rapidly with the increase of temperature. With the temperature increased from 37.8 ℃ to 60.0 ℃, the increments of saturated vapor pressures of all five samples were more than 80%. Besides temperature, the concentration of components with the carbon number from 7 to 15 in the oil is another significant factor which affects the saturated vapor pressure of pipeline crude oils. The higher concentration of these components is, the lower saturated vapor pressure of pipeline crude oils has. Furthermore, a correlation for predicting the saturated vapor pressure of pipeline crude oils of the aimed oil field was developed, in which both the temperature and basic physical properties of the oil were considered. The simulated results agreed well with the experimental results. [ABSTRACT FROM AUTHOR]