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在目前地层压力低于露点压力的天然气/凝析油藏的常规试井分析中 ,通常是建立一个两层径向流复合模型。室内实验和数值模拟分析认为在地层不同的位置有三种运移方式存在 :①在地层供油边界外部凝析油处于原始饱和状态 ;②在中间过渡带凝析油饱和度增加 ,而天然气的流动性较差 ;③在井壁周围天然气的相对渗透率增加。本文主要研究在试井数据分析中第三个区域的存在 ,并通过 1口井的测试分析说明确认这个区域的困难及重要意义
In conventional well tests of natural gas / condensate reservoirs, where the formation pressure is currently below the dew point pressure, a two-layer composite radial flow model is usually established. Laboratory experiments and numerical simulations show that there are three kinds of migration modes in different positions of the strata: (1) the condensate in the outer boundary of the formation is in the original saturation state; (2) the condensate saturation increases in the intermediate transition zone while the flow of natural gas The nature is poor; ③ the relative permeability of natural gas around the borehole increases. This paper mainly studies the existence of the third region in well test data analysis and illustrates the difficulties and significance of confirming this region through the test analysis of one well