提出了两个计算孤岛－草桥混合原油及其常压重油馏分油气液平衡常数的经验关联式，经考察经验关联式的预测结果良好。采用ＵＮＩＦＡＣ基团贡献模型，用正构烷烃模型分子法确定基团组成，考察了三种模型对原油的泡点、露点及气化率的预测情况，发现拉乌尔平衡常数模型的预测结果最好。对于重油的气液平衡预测，使用ｎ－ｄ－Ｍ－ＬＰ法确定基团组成，经验修正Ｌａｒｓｅｎ模型并回归基团值，对孤岛－草桥、胜利重油的泡点、露点及气化率进行预测，修正后模型提高了预测的精确度。 Two empirical correlation formulas for calculating the gas-liquid equilibrium constants of the isolated island-grass bridge hybrid crude oil and their atmospheric heavy oil fractions are proposed. The prediction results of the empirical correlation are good. The UNIFAC group contribution model was used to determine the group composition with the n-alkane model molecular method. The prediction of the bubble point, the dew point and the gasification rate of the crude oil was investigated. It was found that the predictions of the Raoult equilibrium constant model were the most it is good. For gas-liquid equilibrium prediction of heavy oil, the n-d-M-LP method was used to determine the composition of the groups. The Larsen model was empirically corrected and regressed. The bubble point, dew point and gasification rate of the island- Predicted, revised model improves prediction accuracy.