凝析油气在多孔介质中的相变特征

本文研究了凝析气系统在多孔介质中发生反凝析过程的特征,并与未填充多孔介质相态室中的反凝析过程相比较,发现在这两种不同相变环境所发生的反凝析过程是有区别的。前者由于多孔介质巨大比面的液化核心作用,和孔道、狭缝的毛管凝析作用而使反凝析过程提前发生,并加速反凝析过程。因此,利用相态图版时应考虑地层的影响。

PHASE TRANSITION CHARACTERISTICS OF CONDENSATE OIL AND GAS IN POROUS MEDIA

This paper studies the characteristics of retrograde condensate process of condensate oil and gas taking place in porous media and compares the process with that in phase behavior ceil of unpacking porous media. Experimental results show that retrograde condensate processes which take place in the two phase transition ambients are different. In the former ambient the retrograde condensate process takes place earlier than in the latter ambient and is quickened because of the liquid core of the large specific surface of porous media and the capillary condensation of numerous small channels and fractures. Therefore, the reservoir effect must be taken into consideration when phase diagram is used.