一种基于TDS的地下微咸水判别方法探索  

Exploration of a Simple Method to Distinguish Underground Brackish Water

作　　者：董晓宏 张宁 DONG Xiaohong;ZHANG Ning(Sichuan Metallurgical Geological Survey And Design Group Co.,Ltd.,Chengdu,Sichuan 610000,China)

机构地区：[1]四川省冶勘设计集团有限公司,四川成都610000

出　　处：《水利与建筑工程学报》2021年第6期105-112,共8页Journal of Water Resources and Architectural Engineering

基　　金：成都市城市地下空间资源地质调查项目(5101012018001004)。

摘　　要：微咸水埋深的判断目前主要通过测定水样矿化度直接获得或井液电阻率曲线间接获得,其效果均受孔内液体混合的影响,测试结果往往不准确。为解决以上传统做法面临的问题,探索性提出了一种基于普通钻孔岩心淋滤液的溶解性总固体(TDS)测试来判断地下微咸水埋深的新方法。通过对四川省成都市东部丘陵红层区某项目的数十个钻孔的现场测试,获取了与以往认识基本吻合的微咸水埋深判别结果,且与传统方法相比,该方法操作方便、成本低、节约工期、不受咸淡混合水影响,在大部分红层地层尤其是砂岩中具备较好的适用性,具备较好的推广价值。The depth of brackish water is currently mainly judged by testing the salinity of the water sample or analyzing well fluid resistivity curve.The test results usually are inaccurate because they are both affected by the mixing of the liquid in the hole.In response to these problems,we propose an exploratory method for exploring the buried depth of brackish water based on the TDS test of common borehole core leaching.Through field tests of dozens of boreholes in a project in the hilly red-bed area of eastern Chengdu,the results of the burial depth of brackish water that are basically consistent with previous knowledge have been obtained.Compared with the traditional method,this method is convenient to operate with low cost,time saving and not affected by the mixed salty and brackish water.It has good applicability and promotion value in most red-bed area,especially sandstone.

关 键 词：微咸水 矿化度 TDS 岩心淋滤液 红层区 

分 类 号：P641.12[天文地球—地质矿产勘探]