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凝析油临界流动饱和度是指凝析油能流动的最小饱和度，即凝析油气相渗曲线的端点，长期以来，由于技术条件的限制，均采用模拟油和模拟气对其进行测试，真实凝析油临界流动饱和度是目前国外研究的热点问题，对此，不同的学者以不同体系考虑不同束缚水大小，得到的结果不同，有的甚至结果相反，笔者首次建立了超声波测试高温高压岩心流条件下凝析油临界流动和度的直接测试方法，在人造岩心中测试了两个真实多组分凝析气定容衰竭临界流动饱和度，根据两个凝析气样品在人造岩心中的测试结果得出凝析油的临界流动饱和度分别为15％和18％，为超声波在室内岩心流动实验测试中的应用开辟了新途径。

APPLICATION OF ULTRASONICWAVE IN CONDENSATE CRITICAL FLOWING SATURATION TESTING

Condensate critical flowing saturation means the minimum saturation causing condensate flow,i.e.the endpoint of condensate gas phase permeability curve.For a long time past,it has been tested by use of analogue oil and analogue gas owing to the limitation of technological conditions Real condensate critical flowing saturation is a hot point problem studying abroad at present.For this reason,different results,even contrary ones,have been obtained by different scholars because of considering different quantities of irreducible water in different systems.A method of directly testing the condensate critical flowing saturation by ultrosonic wave under flowing conditions in core at high pressure and high temperature was first proposed and two constant volume depletion critical flowing saturations of real multi component condensate gas were measured in artificial cores by the authors.According to the measure results of the two condensate gas samples in the artificial cores,it is obtained that the condensate criticle flowing saturation are 15% and 18% respectively,which opens up a new way for the application of ultrosonic wave in laboratorial core flowing testing.