问答题 翻译：As pressure and diameters increased, it was found that compressibility of the gas that occurs when the gas is under pressure errors into the calculation, and the revised formula was eveloped to account for this property of natural gas.

问答题 翻译：Crude petroleum is not an equilibrium mixture, and on a geological time scale its composition is slowly changing.

问答题 翻译：The producing gas-oil R is the radio of the volumetric gas production rate to the volumetric oil production rate, both at surface.