Dranchuk Abu Kassem model (DAK model) is the most frequently used for calculating gas compressibility factor. Its application showed that the method was not accurate enough for calculating the compressibility of high pressure gas.

• 目前计算高压下天然气偏差系数最常用的是Dranchuk Abu Kassem模型 ,但在实际应用中 ,这种模型的计算结果存在较大的误差。