A compositional model usually performs a lot of phase equilibrium calculations.
在油气藏的组分模型中，需要进行大量的相平衡计算。
A new solution method to compositional model is investigated, which is implicit to pressure and saturation of oil and gas, and explicit to mole fractions of components.
提出了一种对压力和饱和度隐式、组分摩尔分数显式的部分隐式组分模型求解方法。
At the same time, the phase equilibrium theory and the physical properties parameters calculation have been studied, which lays a good theoretical foundation for the use of compositional model.
同时，对油气体系相平衡理论和物性参数计算进行研究，为组分模型的运用奠定了坚实的理论基础。
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