高频大地电磁测深(EH-4)在热储构造勘查中的试验研究-以抚州地热区为例  

The Test Research of High Frequency Magnetotelluric Sounding to Reservoir Structure Survey:Taking the Fuzhou Geothermal Area in Jiangxi Province as an Example

作　　者：叶益信[1] 邓居智[1] 方根显[1] 

机构地区：[1]东华理工大学放射性地质与勘探技术国防重点学科实验室,江西抚州344000

出　　处：《地质与勘探》2011年第4期649-653,共5页Geology and Exploration

基　　金：东华理工大学校长基金理工类项目(DHXK1022);国家重大科技专项(SinoProbe-03-04)联合资助

摘　　要：EH-4电磁成像系统是目前国内外较为先进的电磁法勘探仪器,它具有勘探深度大、成果反应直观、轻便高效等优点。本文首先介绍了该方法的工作原理,然后以抚州地热区的勘查为例,说明它在热储构造勘查中的应用。本文通过高频大地电磁测深(EH4)在抚州地热区的应用,结合快速松弛反演(RRI)技术,揭露了该地区的深部地电剖面特征,反演结果与地质资料相吻合,剖面1、2的反演结果显示该区域深部具有较明显低阻异常带,异常清晰、显著,且与断裂带的位置相吻合,这表明EH4方法在该区域热储构造勘查中取得了较明显的效果,为该区域寻找深部接替地热资源指明了方向。Nowadays the EH4 electromagnetic imaging system is a fairly advanced eleetmmagnetic exploration instrument characterized by wide exploration depth, intuitive production response, portability and high efficiency. This paper firstly introduces the principle of EH4 electromagnetic imaging system, then taking the Fuzhou geothermal area in Jiangxi province as an example, to illustrate its application to reservoir structure survey. In this paper Rapid Relaxed Inversion （ RR1 ） method is used to inverse our getting EH4 data. The inversion result reveals the main features of deep geoelectric sections in this area, which are correlates with the geology data. The inversion result of profile 1 and 2 shows that there is clearly low resistivity anomaly on the fault crossed position. This shows that EH4 method has good effect to reservoir structure survey in this area, and gives us a direction to exploit deep geothermal resources in this area.

关 键 词：地热 高频大地电磁测深 快速松弛反演 

分 类 号：P631.223[天文地球—地质矿产勘探]