The model introduces the Cardan formula to solve and expresses the solution as a form of trigonometric function or hyperbolic function,which is suit for the CO2 viscosity calculation of cross-critical wide ranges of temperature and pressure existed during the gas injection.
鉴于P-V-T和T-μ-P图的相似性建立的基于P-R状态方程的CO2黏度模型,通过引入卡当公式求解并将解表示成三角函数和双曲函数的形式,适用于注气过程中存在跨临界的宽温度、宽压力范围的CO2黏度的计算。