摘要
通过实验和模型计算,研究了CO_2-原油体系粘度的影响因素以及相应规律。在相同含水率、CO_2注入摩尔分数条件下,体系的黏度随着温度的升高而降低。在一定温度下,压力高于泡点压力时,粘度随压力的减小而减小;压力低于泡点压力时,粘度随压力的减小而增加。油样的粘度计算结果符合相对粘度与CO_2注入摩尔分数呈线性关系。与现有的粘度计算模型相比,改进的PR模型考虑的因素更加全面,计算精度更高,可以用于CO_2-原油体系粘度的计算。
The factors affecting the viscosity of the CO_2-crude oil system and the corresponding laws were studied by experiments and model calculations.The results show that,under the same water cut and CO_2 injected mole fraction,the viscosity of the system will reduce with temperature rise.In the specific temperature,when the pressure is higher than bubble pressure,the viscosity will reduce with the pressure reducing.But the viscosity will go up with the pressure reducing when the pressure is below the bubble pressure.And the calculation results have proved the conclusion that the relative viscosity has linear relationship with the CO_2 injected mole fraction.Compared with the viscosity calculation models existed,the improved model concentrates on more aspects and has higher calculation precision.The model can be used in the viscosity calculation of the CO_2-crude oil system.
出处
《当代化工》
CAS
2018年第1期197-200,208,共5页
Contemporary Chemical Industry
