科学技术与工程
中国技术经济学会
综合地球物理方法在Ⅱ-3型地热勘查中的应用：以青海同仁盆地为例
何胜 , 汪万录 , 赵文强 , 潘军
科学技术与工程 ›› 2024, Vol. 24 ›› Issue (9) :3567-3575
综合地球物理方法在Ⅱ-3型地热勘查中的应用：以青海同仁盆地为例
Application of Integrated Geophysical Methods in Type Ⅱ-3 Geothermal Exploration: An Example of Tongren Basin in Qinghai Province
地热能是清洁能源勘探开发利用的焦点。选择青海同仁盆地开展地热物探勘查实践。首先以1∶5万地面高精度磁测资料为基础，结合区域地质资料划分断裂构造、隐伏岩体范围，圈定地热异常靶区。对其中的M3靶区进行了大比例尺地球物理探测和钻探查证。通过地球物理方法组合（主要利用微动探测法并在电磁干扰较小的地段补充可控源音频大地电磁法），基本查明了同仁盆地地热勘查类型为兼有层状热储和带状热储特征、彼此存在成生关系、地质构造条件比较复杂的Ⅱ-3型，为后续在该区开展地热资源勘查指明了方向。
Geothermal energy is the focus of clean energy exploration, development and utilization. The Tongren Basin in Qinghai Province was selected for geothermal geophysical exploration practice. Firstly, based on the 1 ∶ 50 000 high-precision magnetic survey data, combined with regional geological data, the range of fault structures and hidden rock masses was divided, and the geothermal anomaly target area was delineated. Through the combination of geophysical methods, mainly using micro motion detection method and supplementing controllable source audio magnetotelluric method in areas with low electromagnetic interference, it has been basically determined that the geothermal exploration type in Tongren Basin is type Ⅱ-3, which has both layered and banded thermal storage characteristics, mutual generation relationship, and relatively complex geological and structural conditions. The research has pointed out the direction for subsequent geothermal resource exploration in the area.
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