地下水矿化度检测的地球物理方法  

Geophysical method to detect mineralization degree of groundwater

作　　者：王赟[1] 赵发展[1] 蔡纲[2] 田小红[3] 励宝恒[2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100101 [2]中国地质调查局发展研究中心,北京100083 [3]中国石油股份公司大港油田分公司油气勘探开发技术研究中心,天津300280

出　　处：《水文地质工程地质》2003年第6期33-36,共4页Hydrogeology & Engineering Geology

基　　金：中国地质调查局"利用已有物探资料进行地下水资源评价的示范"项目(200120120074)

摘　　要：传统的水文地质研究方法在进行地下水水质评价时,是通过地下水的取样进行分析化验,确定含水岩组中水的矿化度。目前,在利用已有的地质、地球物理资料进行西部地下水资源评价的研究中,鉴于大多数石油井中没有浅层地下水的水样化验资料,本文介绍一种利用石油测井数据计算地下水矿化度的方法,并将之应用于鄂尔多斯白垩系自流水盆地地下水矿化度估算。应用实例证明这种方法是较为可靠的,虽然存在一定的误差,但基本可以满足地下水矿化度分级评价的要求,从而开发了石油测井数据在水文地质中的应用,减少了地下水水质评价的资金投入,同时提高了矿化度预测的精度。Mineralization degree is the key factor to determine water quality.In the field of geological hydrology,the quality estimation of groundwater is mainly determined by chemical examination of the water sampling.At present,we focus our research on the groundwater resource based on petroleum geophysical data sampled before.However,there is no information about the chemical examination of groundwater because the target of the petroleum exploration is the oil and gas.So we introduce a petroleum well\|logging method here to estimate mineralization degree of groundwater.After analyzing various logging curves,the data of spontaneous potential(SP) can be used to calculate the resistivity of groundwater and then mineralization degree can be obtained from the relationship between temperature,mineralization degree and resistivity.After application of the introduced method on eight wells in Ardos Basin, reliability can be proved through the comparison between estimated results and the samples' tests in experiment.All that means that we can get the mineralization degree without water sampling,and can accelerate process of water quality estimation in the whole area.

关 键 词：地下水 矿化度检测 地球物理方法 水质 自然电位 电阻率 

分 类 号：P631.3[天文地球—地质矿产勘探]