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《Acta Petrolei Sinica》 2006-01
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Phase state and recovery of different condensate gas reservoir in tight porous media

Li Guangyue~1 Guo Ping~2 Lin Chunming~1(1.Department of Earth Sciences,Nanjing University,Nanjing 210093,China;2.State Key Laboratory for Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum Institute,Chengdu 610500,China)  
The depletion experiments on the condensate gas systems with different condensate oil content were carried out in PVT cells and long cores.The condensate oil saturation was tested.The conventional relative permeability curves at the ordinary temperature and low-pressure,and the equilibrium oil-gas relative permeability curve at high pressure and high temperature were determined.The results showed that the recovery of condensate oil from the long cores is two times larger than that in PVT cells.The condensate oil recovery prediction of the depletion experiment in PVT cells and long cores by the two kinds of curves and CMG simulation software showed that the different relative permeability curves with different interfacial tension lead to the variation of condensate oil recovery.It is suggested that the real relative permeability curves should be used in the numerical simulation.For the condensate gas reservoir with low condensate oil,the condensate oil saturation in long cores is higher than that in PVT cells,and there is not evaporation phenomenon.The condensate oil saturation still remains the maximum value in despite of the pressure declining.It shows that the formation in the tight condensate gas reservoir would be damaged by the condensate oil.
【Fund】: 国家自然科学基金项目(No.40272063)资助
【CateGory Index】: TE377
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