物探测井在柬埔寨水井施工中的应用  

The Application of Geophysical Logging to the well construction in Cambodia

作　　者：李勇 LI Yong(No.280 Research Institute,CNNC,Guanghan,Sichuan618300)

机构地区：[1]核工业二八〇研究所地质勘查院

出　　处：《四川地质学报》2019年第3期476-480,共5页Acta Geologica Sichuan

摘　　要：以《中国援助柬埔寨乡村供水项目》水井施工为例,介绍了综合物探测井在解释含水层的重要性;结果表明,自然伽马测井曲线均为正向偏移形成的异常、自然电位均为负异常,视电阻率的均表现为低阻异常,利用这三种曲线组合能很好的解释含水层。对于隔水层,三种曲线均表现为正异常,而与含水层对比有很好的极差响应。根据测井解释成果与地质水文资料结合分析,主要的含水层为基岩裂隙水为主,其次为第四系与基岩接触带,本文分别解释了具有代表性磅清扬省CACW-61钻孔和磅士卑省CACW-379钻孔,为后续水井成井提供科学依据。By the example of construction of wells of the“China's assistance to Cambodian rural water supply project”,this paper has a discussion on the importance of comprehensive geophysical logging to explanation of aquifer.The test results show that all of the natural gamma-ray curve and spontaneous-potential curve show negative anomalies,whereas the apparent resistivity shows a positive anomaly.These are characteristic of aquifer.All of the three curves for the aquifuge show positive anomalies,but they have very poor response to the aquifer.According to the logging interpretation,geological and hydrological data,water in the main aquifer is dominated by bedrock fissure water,followed by the water between the Quaternary and bedrock.The representative boreholes CACW-61 in Kompong Chhnang and CACW-379 in Kompong Speu are explained respectively,which provides scientific basis for the subsequent exploration of wells.

关 键 词：测井曲线 自然伽马 自然电位 视电阻率 含水层 

分 类 号：P631[天文地球—地质矿产勘探]