油藏流体高压粘度的实验测定与关联

MEASUREMENT AND CORRELATION OF HIGH PRESSURE VISCOSITIES OF RESERVOIR CRUDE OIL

油藏流体高压粘度对油田开发及油藏模拟计算都是一个非常重要的参数。然而油藏流体高压粘度的预测尤其是液相粘度的预测是比较困难的。本文采用美国 RUSKA公司的高压粘度计实测了辽河原油高压下的粘度,并对 Pellegrini 提出的粘度预测方法(即将状态方程与传递性质理论相结合)作了探讨和改进。原方法只适用于明确组分混合物的粘度计算,本文的工作将其扩展应用于复杂混合物即油藏流体高压液相粘度的预测,并取得了较为满意的结果。

The high pressure viscosity data of reservoir fluids are of extreme impo- rtance in oil production and reservoir simulation.However,it is well known that the prediction of reservoir fluid viscosities under high pressure is a diffi- cult problem. In this study,high pressure viscosities of reservoir crude oil sample from Liaohe oilfield here been measured.A modified Pellegrini model has been deve- loped for predicting the viscosities of reservoir fluids under high pressures,in which PR equation of state is coupled with Enskog's transport theory. The proposed new model has been tested on 30 sets of viscosity data from (?)aohe oilfield and significant improvements in predicting accuracy has been observed.