PHASE TRANSITION CHARACTERISTICS OF CONDENSATE OIL AND GAS IN POROUS MEDIA
Yan QingLai, et al (Department of oil Field Development)
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.