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本文概述了ECK-1型渗透率自动测定仪的分析原理、气测流程的设计、节流毛细管的标定、压力与流量工作曲线的绘制和测试程序操作及试验研究对比方法。 大量分析数据对比表明,该仪器重复性误差小于5％的样品,占总分析样品数的95%,测量精度可达1.5%左右。同一样品复测三次分析偏差都小于4%。渗透率在40—7000×10~3μm~2范围内的82块岩样,相对误差小于5％的占总分析样品数96.3%,与美国仪器平行测定的5块样品的渗透率值,均在分析误差之内。
This article summarizes the analysis principle of the ECK-1 automatic permeability tester, the design of the gas measuring process, the calibration of the throttling capillary, the drawing of the working curve of the pressure and the flow, and the operation and comparison of the experimental research. A large number of analysis of data shows that the instrument less than 5% reproducibility error of the sample, the total number of samples analyzed 95%, the measurement accuracy of up to 1.5%. The same sample retest analysis of three times less than 4% deviation. 82 samples with permeability of 40-7000 × 10 ~ 3μm ~ 2 accounted for 96.3% of the total analyzed samples with relative error less than 5%. The permeability values of 5 samples parallel to the American instrument were Within the analysis error.