The Phase Equilibrium of a Volatile Oil System Considering the Capillary Pressure

Abstract

Abstract: In order to really reflect the characteristics of phase behavior and percolation of a volatile of oil system in reservoir porous media, the effect of the interfacial phenomena on the phase equilibrium rule and the percolation rule should be taken into account in the porous media for a volatile oil system. As a result, the production performance of a volatile oil reservoir can be recognized well and then can be exploited effectively. The capillary pressure, the bubble point pressure, the liquid content and the relative volume of the constant compositional expansion are calculated for a practical volatile oil-gas system by using the software of phase behavior. The conclusion of the great effect of capillary pressure on this system is drawn in this paper.

Key words: capillary pressure, volatile reservoir, phase equilibrium, porous media

CLC Number:

TE311

ZHANG Mao-lin, MEI Hai-yan, SUN Liang-tian, LI Shi-lun, WU Qing-song. The Phase Equilibrium of a Volatile Oil System Considering the Capillary Pressure[J]. Xinjiang Petroleum Geology, 2002, 23(4): 326-328.

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The Phase Equilibrium of a Volatile Oil System Considering the Capillary Pressure

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