MT法在文登地区干热岩资源勘查中的应用

The Application of Magnetotelluric Method to Exploring Hot Dry Rock Resources in Wendeng Area

文登地区地热资源丰富,地热异常与地质构造背景及深大断裂构造有关。为进一步探索文登地区深部地热资源,探测控热构造的深部发育特征。采用大地电磁探测技术,通过研究深部电性结构,推测验证控热构造的分布规律,并成功实施了一眼测温孔。经钻探资料显示,于破碎带处发现四处地温梯度异常带。利用MT法不仅探测研究了控热深大断裂的发育规律,也对下一步干热岩深入研究具有重要意义。

Geothermal resources are abundant in Wendeng area.Geothermal anomalies are related to the regional geological tectonic background and deep fault structures.In order to further explore the deep geothermal resources in Wendeng area and detect the deep development characteristics of heat-controlling structures,this paper adopts magnetotelluric detection technology to study the deep electrical structure,then infers and verifies the distribution law of thermal-controlled structures,and successfully implement a thermometer hole.The drilling data show that there are four abnormal zones of geothermal gradient in the fractured zone.MT method is not only used to detect and study the development regularity of deep thermal-controlled faults,but also is of great significance to the further study of hot dry rocks.