陇东盆地地热资源特征与开发利用研究

Study on Geothermal Resource Features and Exploitation,Utilization in Longdong Basin

陇东盆地蕴藏着丰富的地热资源,地质构造条件、热储地质条件都比较有利地热赋存,是开发地热资源的有利地区。通过对现有资料的分析,结合区域地热研究成果,研究区地热资源属于盆地型地热田,热源为地热增温型,热源主要来自上地幔及地壳中放射性元素衰变产生的放射热。热储层主要为白垩系下统志丹群的洛河组、奥陶系下统马家沟组。地温梯度主要受构造控制,断裂导热是形成本区地热异常的一个重要因素,热储层分布范围大,具有广阔的开发利用前景。

The Longdong Basin holds abundant geothermal resources.The geological structure,geothermal reservoiring geological conditions are all rather favorable to geothermal resource hosting and exploitation.Through available data analysis,combined with regional geothermal study results have considered that geothermal resources in the area belong to basin type geothermal field.Geothermal source belongs to geothermal heating type,mainly from radioactive element decay heat emission in upper mantle and crust.Thermal reservoirs are mainly in the Luohe Formation of lower Cretaceous Zhidan Group and lower Ordovician Majiagou Formation.Geothermal gradient is mainly controlled by structures,faulted structure heat conduction is a major factor to form geothermal anomaly in the area.Geothermal reservoirs have large distribution range with wide exploitation and utilization prospect.