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整理数字γ测井资料,其重要之点是选择适宜的深度间隔△_1和考虑解释方法的特性。研究这些内容的目的在于提高测井反演解的精度。显然,如采用的间隔△_1过小,统计涨落对γ测井结果就会有很大影响;而△_1过大,将导致原始信号发生畸变,同时也会使反演解的详细度遭到损失。文献给出γ测井反演适宜间距△(解释间距)为10cm。设J(x)为被测信号,放射性元素含量沿钻孔轴分布的表达式为:
Tidying up the digital γ logging data, the important point is to select the appropriate depth interval △ _1 and to consider the characteristics of the method of interpretation. The purpose of these studies is to improve the accuracy of logging inversion solutions. Obviously, if the interval △ _1 used is too small, the statistical fluctuation will have a great influence on the γ logging result; while △ _1 is too large, the original signal will be distorted, and the detailed degree of the inverse solution will be To loss. The literature gives γ logging inversion suitable spacing △ (interpretation of spacing) is 10cm. Let J (x) be the signal under test and the distribution of radioactive elements along the borehole axis is: