直流电测深法在沿海平原区地质填图中的应用——以苏北盆地连云港灌云地区为例
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摘要
以苏北盆地平原区1∶5万灌云县、同兴街幅地质填图为例,在研究区内开展面积性电阻率测深勘探,辅以钻探、测井、地质钻孔联合剖面,浅层地震等方法,与电测深方法进行对比分析,突出该方法的经济性与有效性。利用电测深法获得了区内浅地表电性特征,为区内盐碱地的脱盐化提供依据;对区内地下水咸化特征进行了刻画,获得了区内咸淡水分布特征并对区域内淡水资源的利用提供指导;对区域基岩面特征及断裂构造特征进行划分,在区域东南角划分NE向淮阴—响水断裂。通过钻孔验证,认为直流电测深法在平原区地质填图中可以有效弥补钻孔密度的不足,是一种简单有效的勘探方法,值得在平原区地质填图中广泛应用。
In this study,the authors used direct-current sounding method (DC method) to explore the electrical resistivity property of Guanyun area in northern Jiangsu basin,based on the 1 ∶ 50000 geological map. In combination with drilling,well-logging,geological combined profile and shallow layer reflection methods,the authors evaluated the economics and effectiveness of the DC method. The authors obtained the geomorphological electric characteristics of the study area based on the DC method,which provided a basis for the desalinization of saline-alkali land in the study area. The authors first obtained the distribution of brackish water in this area based on the salinization characteristics of underground water,and provided a guidance for the use of fresh water resources. Then,the authors described the distribution of fractures and regional bedrock surface,and fixed the location of the Huaiyin-Xiangshui fault in the northeastern part of the study area. In combination with the results of drilling,the authors holds that DC sounding is an effective and simple method of geological mapping in plain area and will be a useful compensation of the low borehole density in the study area. Therefore,it is suggested that the DC method is an effective exploration method and can be widely used in geological mapping in plain areas.
In this study,the authors used direct-current sounding method (DC method) to explore the electrical resistivity property of Guanyun area in northern Jiangsu basin,based on the 1 ∶ 50000 geological map. In combination with drilling,well-logging,geological combined profile and shallow layer reflection methods,the authors evaluated the economics and effectiveness of the DC method. The authors obtained the geomorphological electric characteristics of the study area based on the DC method,which provided a basis for the desalinization of saline-alkali land in the study area. The authors first obtained the distribution of brackish water in this area based on the salinization characteristics of underground water,and provided a guidance for the use of fresh water resources. Then,the authors described the distribution of fractures and regional bedrock surface,and fixed the location of the Huaiyin-Xiangshui fault in the northeastern part of the study area. In combination with the results of drilling,the authors holds that DC sounding is an effective and simple method of geological mapping in plain area and will be a useful compensation of the low borehole density in the study area. Therefore,it is suggested that the DC method is an effective exploration method and can be widely used in geological mapping in plain areas.
引文
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[13]汤井田,刘子杰,刘峰屹,等.音频大地电磁法强干扰压制试验研究[J].地球物理学报,2015,58(12):4636-4647.Tang J T,Liu Z J,Liu F Y,et al.The denoising of the audio magnetotelluric data set with strong interferences[J].Chinese J.Geophys.,2015,58(12):4636-4647.
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[15]Zohdy A A R.A new method for the automatic interpretation of Schlumberger and Wenner sounding curves[J].Geophysics,1989,54(2):245-253.
[16]阮百尧,徐世浙.直流电阻率测深曲线解释中的直接反演法[J].物探化探计算技术,1996,18(2):118-124.Ruan B Y,Xu S Z.A direct inversion method in the interpretation of vertical electrical sounding curves[J].Computing Techniques for Geophysical and Geochemical Exploration,1996,18(2):118-124.
[17]王兴泰,李晓琴,孙仁国.电测深曲线的遗传算法反演[J].地球物理学报,1996,39(2):279-285.Wang X T,Li X Q,Sun R G.The inversion of resistivity sounding curve using genetic algorithms[J].Chinese J.Geophys.,1996,39(2):279-285.
[18]程飞,王丽萍.解释电测深曲线的Dar Zarroutk反演法[J].工程地球物理学报,2009,6(4):426-429.Cheng F,Wang L P.Interpretation of electric sounding curve by Dar Zarrouk inversion[J].Chinses Journal of Engineering Geophysics,2009,6(4):426-429.
[19]石明生,张永雨.电测深法和钻探相结合在山区地质勘察中的应用[J].地质与勘探,2005,41(5):92-95.Shi M S,Zhang Y Y.Application of the combination method of electric sounding and drilling in geological investigation in mountain districts[J].Geology and Prospecting,2005,41(5):92-95.
[20]邢一飞,张诚,邢忠信,等.浅层咸水资源化开发利用及生态环境效益分析---以沧州沿海地区为例[J].水土保持应用技术,2015,(2):29-31.Xing Y F,Zhang C,Xing Z X,et al.The development and utilization of shallow salt water resource and the ecological environment benefit analysis-a case study of Cangzhou coastal areas[J].Technology of Soil and Water Conservation,2015,(2):29-31.
[21]王文,杨云,崔巍,等.沿海地区非常规水资源开发利用方法与策略[J].江苏农业科学,2015,43(4):1-4.Wang W,Yang Y,Cui W,et al.The methods and strategies of unconventional water resourcesn development in coastal areas[J].Jiangsu Agricultural Science,2015,43(4):1-4.
[2]李远强.物探方法在区域地质调查中的应用[J].城市地质,2015,10(1):56-60.Li Y Q.The Application of geophysical exploration in regional geology survey[J].Urban Geology,2015,10(1):56-60.
[3]龙作元.电阻率测深法在阿拉尔盆地划分咸、淡水层的应用[J].物探与化探,2006,30(4):308-311.Long Z Y.The application of the resistivity sounding method to the differentiation of salt water bed from fresh water bed in Alaer basin[J].Geophysical&Geochemical exploration,2006,30(4):308-311.
[4]张志厚,刘国兴,唐军辉,等.漠河地区天然气水合物远景调查之---电法探测岩石性永久冻层的应用研究[J].地球物理学进展,2007,22(3):887-895.Zhang Z H,Liu G X,Tang J H,et al.The prospective investigation of gas hydrate in Mohe region-the application research of using electrical method to explore the ever frozen layer[J].Progress in Geophysics,2007,22(3):887-895.
[5]杨桂林,刘金涛,王柱.直流电测深数据处理方法在地下水勘探中的应用效果[J].资源环境与工程,2008,22(6):610-613.Yang G L,Liu J T,Wang Z.Application effect of data processing methods of direct current electrical sounding in ground water exploration[J].Resources Environment&Engineering,2008,22(6):610-613.
[6]樊永刚,贾大为,赵锁志,等.常规电阻率测深法在阿拉善干旱荒漠区找水中的成功应用[J].物探与化探,2018,42(5):896-901.Fan Y G,Jia D W,Zhao S Z,et al.The successful application of conventional resistivity sounding method to water prospecting in arid desert area of Alxa[J].Geophysical&Geochemical exploration,2018,42(5):896-901.
[7]Oliveira Braga A C,Filho W M,Dourado J C.Resistivity(DC)method applied to aquifer protection studies[J].Revista Brasileira de Geofisica,2006,24(4):573-581.
[8]Mohamed A,Ahmet T B,Irfan A.Hydraulic conductivity estimation using direct current(DC)sounding data:a case study in East Nile Delta,Egypt[J].Hydrogeology Journal,2014,22(5):1163-1178.
[9]Mbonu P D C,Ebeniro J O,Ofoegbu C O,et al.Geoelectric sounding for the determination of aquifer characteristics in parts of the Umuahia area of Nigeria[J].Geophysics,1991,56(2):284-291.
[10]Asfahani J,Abou Zakhem B.Geoelectrical and hydrochemical investigations for characterizing the salt water intrusion in the Khanasser Valley,Northern Syria[J].Acta Geophysica,2013,62(2):422-444.
[11]邓启东,冉勇康,杨晓平,等.中国活动构造图(1∶400万)[M].北京:地震出版社,2007.Deng Q D,Ran Y K,Yang X P,et al.Map of Active Tectonics in China(1∶400 Million).Beijing:Seismological Press,2007.
[12]刘国兴.电法勘探原理与方法[M].北京:地质出版社,2005.Liu G X.Electrical prospecting principle and method[M].Beijing:Geological Publishing House,2005.
[13]汤井田,刘子杰,刘峰屹,等.音频大地电磁法强干扰压制试验研究[J].地球物理学报,2015,58(12):4636-4647.Tang J T,Liu Z J,Liu F Y,et al.The denoising of the audio magnetotelluric data set with strong interferences[J].Chinese J.Geophys.,2015,58(12):4636-4647.
[14]马义忠.影响新一轮三维地震勘探成本因素分析[J].石油地质与工程,2009,23(2):43-45.Ma Y Z.The cost of a new round of three-dimensional seismic exploration factor analysis[J].Petroleum Geology and Engineering,2009,23(2):43-45.
[15]Zohdy A A R.A new method for the automatic interpretation of Schlumberger and Wenner sounding curves[J].Geophysics,1989,54(2):245-253.
[16]阮百尧,徐世浙.直流电阻率测深曲线解释中的直接反演法[J].物探化探计算技术,1996,18(2):118-124.Ruan B Y,Xu S Z.A direct inversion method in the interpretation of vertical electrical sounding curves[J].Computing Techniques for Geophysical and Geochemical Exploration,1996,18(2):118-124.
[17]王兴泰,李晓琴,孙仁国.电测深曲线的遗传算法反演[J].地球物理学报,1996,39(2):279-285.Wang X T,Li X Q,Sun R G.The inversion of resistivity sounding curve using genetic algorithms[J].Chinese J.Geophys.,1996,39(2):279-285.
[18]程飞,王丽萍.解释电测深曲线的Dar Zarroutk反演法[J].工程地球物理学报,2009,6(4):426-429.Cheng F,Wang L P.Interpretation of electric sounding curve by Dar Zarrouk inversion[J].Chinses Journal of Engineering Geophysics,2009,6(4):426-429.
[19]石明生,张永雨.电测深法和钻探相结合在山区地质勘察中的应用[J].地质与勘探,2005,41(5):92-95.Shi M S,Zhang Y Y.Application of the combination method of electric sounding and drilling in geological investigation in mountain districts[J].Geology and Prospecting,2005,41(5):92-95.
[20]邢一飞,张诚,邢忠信,等.浅层咸水资源化开发利用及生态环境效益分析---以沧州沿海地区为例[J].水土保持应用技术,2015,(2):29-31.Xing Y F,Zhang C,Xing Z X,et al.The development and utilization of shallow salt water resource and the ecological environment benefit analysis-a case study of Cangzhou coastal areas[J].Technology of Soil and Water Conservation,2015,(2):29-31.
[21]王文,杨云,崔巍,等.沿海地区非常规水资源开发利用方法与策略[J].江苏农业科学,2015,43(4):1-4.Wang W,Yang Y,Cui W,et al.The methods and strategies of unconventional water resourcesn development in coastal areas[J].Jiangsu Agricultural Science,2015,43(4):1-4.