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通过测量地层中自然伽玛射线或中子诱发的伽玛射线能谱,并进行能量和强度分析,可以达到探测成矿元素的含量和识别地层的目的。这种测井方法就叫做伽玛能谱测井。因为它不是测量地层的有关物理量,而是在钻孔内直接地、定量地测量某些有用元素的含量,所以又称为元素测井。能谱测井由于地质效果显著,已受到国内外测井界的普遍重视,被认为是测井技术的重大突破。以前的能谱测井仪中用碘化钠探测器,但由于碘
By measuring the natural gamma ray or neutron-induced gamma ray energy spectrum and conducting energy and intensity analysis, the content of ore-forming elements and the purpose of identifying strata can be achieved. This logging method is called gamma-ray logging. It is also called elemental logging because it does not measure the physical quantity of the formation but rather directly and quantitatively measures the amount of certain useful elements in the borehole. Because of the obvious geological effect, spectrum logging has been widely valued by domestic and international logging circles and considered as a major breakthrough in logging technology. Previous spectrum logging tools used sodium iodide detectors, but due to iodine