关键词: 高温高压, 凝析气藏, 高含蜡凝析气, 流体相态, 压缩因子, 物理性质

Abstract: Much attention should be paid to the phase behavior and properties of such type of fluids as more and more high pressure hydrocarbon reservoirs are discovered world wide.The reservoir fluid is recombined using the separator liquid and gas samples collected from an actual gas field.The phase behavior and physical properties of highly waxy gas condensate is for the first time studied at pressures up to 100MPa.The dew point pressure is measured at 81.6MPa.The reservoir fluid contain much content of wax.The fluid exhibits plain yellow at the pressures above dew point,which is consistent with the fore-mentioned characteristic of high wax content.The generally applied and accurate correlation is used to calculate the compressibility factor of high pressure fluid.The results show that the calculated values are less than the measured ones,the relative error is above 10% and become larger with pressure.

Key words: gas condensate, phase behavior, compressibility factor, density, wax, high temperature, high pressure