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不同岩性的颗粒度、孔隙度相近时,则电阻率ρ与地下水矿化度e之间存在着相关关系ρ=a/e~b。为此,利用所获得的井旁电测深资料及已知地下水矿化度,可划分其咸淡水界面。
When the lithology and porosity of different lithologies are similar, the relationship between resistivity ρ and groundwater salinity e is related ρ = a / e ~ b. For this reason, the salt water freshwater interface can be divided according to the well-side sounding data obtained and the known degree of groundwater salinity.