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在胜利、辽河及新疆九区原油常压重油气液平衡实测数据的基础上，采用逐步回归的方法，得到适用于以上三种原油常压重油气液相平衡常数Ｋｉ计算的经验关联式，并通过平衡闪蒸计算进行考察，计算结果：平衡闪蒸温度预测的平均绝对偏差和相对偏差分别为５．６４Ｋ和０．９０％，闪蒸气化率的平均绝对偏差和相对偏差分别为２．１２％和１０．９０％。大大优于ＳＲＫ方程预测的结果。
On the basis of the measured data of Shengli, Liaohe and Xinjiang 9th crude oil, the stepwise regression method is used to obtain the empirical correlations applicable to the calculation of liquid equilibrium constants Ki of the above crude oil at atmospheric pressure The results of the equilibrium flash calculation show that the average absolute deviation and the relative deviation of the equilibrium flash evaporation temperature are 5.64K and 0.90%, respectively. The average absolute deviation and relative deviation of the flash gasification rate are 2.12 % And 10.90%. Much better than the SRK equation prediction results.