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。
Moreover equations of degree higher than quartic often arise in equilibrium calculations.
况且，在平衡计算中常常发生比四次方程还高的高次方程。
The results showed that continuation method is an efficient algorithm for the phase equilibrium calculations of reservoir fluids.
结果表明延拓法对初值要求低，是油藏流体相平衡计算的一种有效算法。
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