During the process of gas production in gas Wells, vapor will condensate into liquid water due to the cut down of pressure and temperature of natural gas.
在气井生产过程中，由于天然气压力和温度的降低，水蒸气会凝析成液态水。
2
Composition and thermodynamics character of LNG vapor and liquid vary as liquid's vaporizing, so LNG physical characteristic must be calculated in the simulate process.
Before the precipitation, there appears a process of obvious increase in the amount of water vapor and cloud liquid water, and after the precipitation, a process of obvious decreases.