兰州新区西部恐龙园区块地热地质条件分析

Geothermal geological conditions of the Western Dinosaur Park block in the Lanzhou New area

兰州新区西部恐龙园位于兰州—民和盆地,具有较好的地热勘查及开发利用前景。为进一步查清研究区热储层位和地热地质条件,在研究以往区域地质构造及地热特征的基础上,进行了可控源音频大地电磁测深和大地电磁测深勘查,据此布孔,打出了温度适宜、可供利用的地下热水。结合物探及钻探成果,推断解释了研究区的构造和岩体分布特征,对研究区地热地质条件进行了分析,并指出下一步的勘查方向。研究结果为邻区和类似地区地热勘探提供了借鉴和参考。

The Western Dinosaur Park of the Lanzhou New area,located in the Lanzhou-Minhe Basin,has encouraging prospects for geothermal exploration,development,and utilization.Based on the previous results of regional geological structure and geothermal characteristics,this study further investigated the geothermal reservoir horizons and the geothermal geological conditions using both the controlled source audio-frequency magnetotellurics(CSAMT)and the magnetotelluric sounding.Then,available geothermal water with suitable temperatures was discovered by drilling.Based on the geophysical exploration and drilling results,this study deduced and explained the structure and pluton distribution of the study area,analyzed the geothermal geological conditions,and pointed out the future exploration direction.The results of this study can be utilized as a reference for geothermal exploration in adjacent areas of the Western Dinosaur Park and similar areas.