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在勘探过程中,γ测井和用γ测井所获得的强度曲线值,常因钻孔内存在水和铁套管的吸收而偏低,为了得到钻孔内岩(矿)体的真实γ强度,必须进行相应的吸收修正。目前,使用的吸收修正值,是γ测井规程中规定的水、铁吸收γ射线强度曲线值,该吸收曲线经验证是理论针算吸收曲线,和实验吸收曲线相比,有一定的出入,为了采用合理的吸收强度值,现提出如下商榷意见,以供参考。
In the process of exploration, the intensity curve obtained by γ logging and γ logging is often low due to the absorption of water and iron casing in the borehole. In order to obtain the true γ Intensity, you must make the appropriate absorption correction. At present, the absorption correction value used is the value of γ-ray intensity curve of water and iron absorption specified in the γ-logging protocol. The absorption curve is verified to be the theoretical absorption curve of the acupuncture absorption curve, which is different from the experimental absorption curve. In order to adopt reasonable values of absorbency, the following opinions are proposed for reference.