中文摘要：

地球物理测井是石油地质中经常使用的一个实用有效的评价方法,可以比较系统的对地下石油、天然气和水层进行定量评价;本文采用地球物理测井中的电位重叠图法以子长县安1井位例,对700米以浅含水层位进行评价,成功解释出储层流体13段,其中地下含水层位6段;希望对陕北地区的水资源勘探开发有所帮助。

英文摘要：

Geophysical logging is used in petroleum geology as an effective evaluation method to quantitative evaluate oil,gas and water layer.This paper use the potential overlap graph to evaluate undergrounawater（take the Zichang AN1 well for the example）;Less than 700 meters depth,we find that there are thirteen fluid reservoirs where have six underground aquifers;we hope this paper can be helpful to explore and exploit underground water resources in Shanbei area.