一、γ射线测井仪的应用前提已建的一些中、小型水库,由于没有充分进行地质勘探工作,较为普遍地存在着程度不同的绕坝基、坝肩,或向邻谷的渗漏现象,亟待进行整治。四川省南充地区岩风沟水库,运用γ射线测井仪探测岩层漏水途径进行定孔灌浆的尝试,使笔者从中深得启示。但是,对该法的应用范围及探测效果,尚值得进一步商榷。 I. Prerequisite for the Application of Gamma-ray Logging Tool Some medium-sized and small-scale reservoirs that have been built generally have different degrees of leakage around dam foundation, abutment or adjacent valleys due to the lack of adequate geological exploration work. Urgently for remediation. Sichuan Province Nanchong area Yanfenggou reservoir, the use of γ-ray logging tool to detect rock leakage path for hole drilling grouting attempt, so I got enlightenment. However, the scope of the application of the law and the detection effect, it is worth further questioning.