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《Natural Gas Industry》 2001-03
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Du Jianfen,Li Shilun and Sun Lei (Southwest Petroleum Institute) and He Jiangchuan (Development Bureau,CNPC).  
The fluids in condensate gas reservoir are set in subsurface porous media and a capillary agglomerating phenomenon occurs inevitably owing to the effect of pore wall surface in porous media,thus influencing the retrograde condensate process and the dew point of condensate gas reservoir unavoidably.For this reason,in the paper,on the basis of analyzing the mechanism of the influence of capillary agglomeration on the dew point of condensate gas reservoir,a phase equilibrium calculation mathematical model of predicting the dew point of condensate gas system in consideration of the effect of the capillary agglomeration in porous media is set up in combination with the fundamental theory of phase equilibrium,and the degree of influence of the pore radius and wettability,of reservoir on the dew point is analyzed and researched by calculating a case.It is indicated that the capillary agglomeration in hydrophobic rocks can make the dew point increase and the one in hydrophilic rocks decrease;under the same wettability,the smaller the capillary radius,the greater the degree of influence on the dew point;and when pore radius is more than 5×10 6 cm,the degree of effect of capillary agglomeration on the dew point of condensate gas reservoir is very small;when less than 5×10 6 cm,the effect on the dew point is relatively obvious.Finally,it is concluded that for the high porosity and high permeability reservoir,when the effect of capillary agglomeration is eliminated the accuracy of phase equilibrium theory can't be influenced;however,for the gas reservoir with low permeability,the effect of capillary agglomeration on the dew point is relatively obvious,which should be considered in the practical engineering.
【CateGory Index】: TE311
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Chinese Journal Full-text Database 10 Hits
1 HU Hai-yan (China Geology University, Wuhan 430074);A Simple Talk about Coagulated Gas Pool[J];Journal of Chongqing Petroleum College;2004-01
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【Secondary References】
Chinese Journal Full-text Database 6 Hits
1 Li Mingjun(Southwest Petroleum University, Chengdu 610500, China), Du Jianfen, Bian Xiaoqiang.;Advances on condensate oil-gas phase behavior research in porous medium[J];Fault-Block Oil & Gas Field;2008-01
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