Abstract：It is most important for modeling the flow state to obtain the representative relative permeability curves of condensate oil/gas，oil/water and gas/water，which are the basic curves most commonly used in numerical modeling and well testing analysis. The fluid flow accompanies the phase change during the reservoir development in a gas condensate reservoir with high temperature and high pressure. Therefore，the relative permeability of the traditional testing with analog oil and gas can not be used for replacing the relative permeability obtained under the reservoir. Based on the analysis of the physical properties of the reservoir rocks and fluid properties，the seepage law of the multiphase is researched under the reservoir temperature and pressure with the condensate oil and gas of the Tazhong oil field in Tarim basin；and the relative permeability curves of condensate oil/gas，oil/water and gas/water are obtained. The results show that the two-phase flow of the oil/water，oil/gas and gas/water will not appear in low porosity and permeability rock；and the two-phase flows of the oil/water，oil/gas and gas/water have large flowing areas and high displacement efficiencies in high porosity and permeability fractured reservoir under the reservoir temperature and pressure. These results offer a very important basic data to simulate or predict the performance of a gas condensate reservoir with high temperature and high pressure.
