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目前,地勘行业中测井曲线解释并确定煤层一般是根据人工伽玛和视电阻率两条曲线。但综合解释不能忽视自然伽玛曲线,它对煤层的反映有一定规律,如低密度、低电阻的似煤异常,在自然伽玛曲线上为负异常,在自然电位曲线上为正异常,可以结论为煤,反之可予否定。凡低密度、电阻较高的似煤异常可从自然伽玛曲线上分析判断,若曲线上为负异常,即为煤,反之可否定。因为松散的砂岩或凝灰岩等在自然
At present, the logging curve in the geology industry explains and determines that the coal seam is generally based on two curves of artificial gamma and apparent resistivity. However, the comprehensive interpretation can not neglect the natural gamma curve, and its reflection on the coal seam has certain rules. For example, low-density and low-resistance coal-like anomalies, negative anomalies in the natural gamma curve and positive anomalies in the natural potential curve, The conclusion is coal, on the contrary it can be denied. Any low-density, high resistance coal abnormalities can be analyzed from the natural gamma curve to determine, if the curve is negative anomaly, that is, coal, on the contrary can be negative. Because of the loose sandstone or tuff in nature