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。
On the basis of the research of the phase state experiment, this article get the model of the fluid and corresponding parameter, used by compositional model, by using component chopping technique.
在须二气藏的相态实验研究基础上，通过组分劈分技术对实验相关参数进行拟合，确定出流体模型以及全组分模型所需的相关参数。
The theory about performance prediction for gas reservoirs by numerical simulation is introduced, and the mathematical model of the compositional simulation is studied deeply;
引入数值模拟法预测气藏动态的基本思想，深入研究了组分数模模型；
The theory about performance prediction for gas reservoirs by numerical simulation is introduced, and the mathematical model of the compositional simulation is studied deeply;
引入数值模拟法预测气藏动态的基本思想，深入研究了组分数模模型；
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