综合物探方法在南通小洋口地区地热勘查中的应用  

The Application of Comprehensive Geophysical Prospecting Method to Geothermal Prospecting in Xiaoyangkou of Nantong City in Jiangsu

作　　者：左丽琼[1] 王彩会[1] 荆慧[1] 邱杨 

机构地区：[1]江苏省地质调查研究院,江苏南京20018 [2]江苏华东基础地质勘查有限公司,江苏南京210007

出　　处：《工程地球物理学报》2016年第1期122-129,共8页Chinese Journal of Engineering Geophysics

基　　金：中国地质调查局地质调查项目(编号:1212011220005);江苏省国土资源厅科技计划项目(编号:201422)

摘　　要：物探是地热资源勘查方法的重要组成部分,为了避免单一物探方法解译的多解性,采用多种物探方法综合解译可以明显提高地热资源勘探精度,降低勘查风险。本文以南通小洋口为例,通过地质条件、地温异常、重磁异常、弹性波速、电阻率等方面的分析,采用40m深孔地温测量、高精度重力剖面测量、微动测深、可控源音频大地电磁测深等综合物探方法进行地热资源勘查,其结果表明,本区地热资源地球物理组合响应表现为高地温、横向低波速、局部有电阻和重力梯度带等异常组合特征。运用本次物探解译结果,基本查明该区的热储层、盖层及导热构造空间分布,成功勘查小洋口2号地热井。该成果可为其他地区同类型地热资源勘查提供有意义借鉴。Geophysical prospecting is an important part of geothermal prospecting. To avoid the multiplicity of single geophysical interpretation, comprehensive interpretation by multiple geophysical methods can improve accuracy of geophysical prospecting and reduce the danger of geothermal prospecting. This paper takes Xiaoyangkou in Nantong city in Jiangsu as an example. By analyzing geology, geothermal anomalous, gravity magnetic anomaly, elasic wave velocity, resistivity and so on, comprehensive geophysical prospecting methods are applied including 40m geothermal measurement, high precision gravity, microtremor survey and CSAMT in geothermal prospecting in Xiaoyangkou area of Nantong city in Jiangsu province. The result is that integrated geophysical anomaly in Xiaoyangkou area shows high temperature, low elastic wave velocity, local resistivity anomaly, gravity gradient zone anomaly. Based on the result, the distribution of geothermal reservoir, geothermal cover layer and structure can be basically found out in the area. At the same time, a geothermal well in Xiaoyangkou area is successfully prospected. So the result can provide some meaningful experiences in the same type geothermal prospecting of other areas.

关 键 词：综合物探方 南通小洋口 地热勘查 

分 类 号：P631[天文地球—地质矿产勘探]