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凝析气 Ｐ Ｖ Ｔ 分析数据是进行气藏数值模拟及开采工艺设计的重要参数，没有这些参数，气藏的开发设计往往不能正常进行。但是在现场，往往由于一些原因，在气藏开发初期未能进行 Ｐ Ｖ Ｔ 取样分析或没有取得有代表性的 Ｐ Ｖ Ｔ 样品，这给进行相态分析和开发研究带来困难。南翼山 Ｅ３ 凝析气藏就是这样一种情况，由于早期测的地层温度不准确以及样品是在井筒６０ ｍ 处取得的（ 不符合凝析气井的取样规范） ，故样品分析结果与生产实际明显不相符合。文章给出凝析气藏相态恢复的原理和研究思路，针对南翼山 Ｅ３ 凝析气藏提出了相应的相态分析方法，恢复了南翼山 Ｅ３ 凝析气藏相态特征，获得了原始流体参数场，从而方便地计算出该气藏原始状态下的各种流体参数。

A PHASE STATE RESEARCH ON THE FORMATION FLUID IN E 3 CONDENSATE GAS RESERVOIR OF NANYISHAN GAS FIELD

Condensate gas PVT analysis data are the important parameters for doing the numerical simulation and production technological design of gas reservoir and the gas reservoir development design can't be well finished for lack of these parameters.On the spot,however,PVT sampling and analyzing couldn't be done or the representative PVT samples were not achieved in the beginning stage of gas reservoir development for some reason,which brought on difficulty in doing phase state analysis and development research.The E 3 condensate gas reservoir in Nanyishan gas field is just the example.Owing to the fact that the formation temperature measured in the early stage wasn't accurate and the sample was sampled at well depth of 60 m (it isn't coincident with the standard of sampling in a gas condensate well),therefore the sample analysis results are widely different from the production practices.The principle and research thinking of restoring the phase state of the condensate gas reservoir are given out in the paper.In the light of the practical situation in the E 3 condensate gas reservoir of Nanyishan gas field,a relevant phase state analysis method is proposed,the phase state properties of the gas reservoir are restored and original fluid parameter fields are achieved,thus conveniently calculating various fluid parameters under original conditions in the gas reservoir.