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美国ＭＩＣ（Ｍｉｃｒｏｍｅｒｔｉｃｓ）公司生产的９２２０Ⅱ型自动压汞仪从８０年代中期进入我国石油天然气勘探开采部门，在用作储集岩孔隙结构实验分析中常出现水银封闭间隙现象，本文分析了该现象产生的各种原因及在资料中的表现形式，总结出消除封闭间隙的定性、定量方法，几年的生产实践应用表明，效果明显。
The 9220 Ⅱ automatic mercury porosimeter produced by MIC (Micromertics) entered our country’s oil and gas exploration and exploitation department in the mid-1980s. It often appears the mercury closed gap phenomenon in the experimental analysis of the pore structure of the reservoir rock. This paper analyzes the phenomenon of Various reasons and the manifestations in the data, summarizes the qualitative and quantitative methods to eliminate the closed gap. The application of several years of production practice shows that the effect is obvious.