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随着对油气勘探开发的不断深入,勘探对象复杂,给测井解释评价带来极大的挑战.基于伽马能谱的元素测井是通过测量地层元素自发产生或中子源激发的次生伽马能谱,利用谱解析方法获得地层元素含量,为复杂储层测井评价提供一种有效手段.本文全面归纳总结了伽马元素能谱测井的发展历程,认为其可分为四个大的阶段:自然伽马能谱测井、地球化学测井、元素俘获能谱测井和基于脉冲中子源的元素能谱测井;并对其测井技术进行展望,认为基于伽马能谱的元素测井应遵循“三多”发展趋势,即:多功能仪器设计、多参数成果解释和多方位近钻头测量.
With the deepening of exploration and development of oil and gas and the complexity of exploration targets, it brings great challenge to well logging interpretation and evaluation.The elemental logging based on gamma-ray spectroscopy is a measure of secondary or secondary source excitation by formation elements Gamma spectroscopy and spectral analysis method to obtain the content of stratum elements, which provides an effective method for logging evaluation of complex reservoirs.This paper comprehensively summarizes the development history of gamma-ray energy spectrum logging, and considers that it can be divided into four Large stages: natural gamma ray spectroscopy, geochemical logging, elemental capture spectroscopy and elemental energy spectrum logging based on pulsed neutron sources; and prospecting for its logging technology, Spectral element logging should follow the trend of “more than three”, namely: multi-functional instrument design, interpretation of multi-parameter results and multi-directional near-bit measurement.