张掖盆地地热资源地质特征分析与研究

在野外实地调查张掖盆地地热资源的基础上,对研究区地热田特征、热储特征、热储温度以及温度场特征进行了分析和研究。研究结果表明:张掖盆地属张扭性盆地,有利地热运移和富集,属中低温地热资源;地热田热储为新近系及白垩系砂岩、砂砾岩、含砾砂岩等,厚度为536 m;经钾镁地热温标估算,热储温度60℃;盖层为新近系上新统疏勒河组泥岩、泥质砂岩层;热源来自地壳深部的热传导。通过对研究区地热田特征、热储特征、热储温度以及温度场特征的分析和研究,可以为当地政府进一步研究、勘探及开发地热资源提供依据。

Analysis and Research on Geological Characteristics of Geothermal Resources in Zhangye Basin

Based on the field investigation of the geothermal resources in the Zhangye Basin, the geothermal field characteristics, thermal storage characteristics, thermal storage temperature and temperature field characteristics of the study area were analyzed and studied. The results show that the Zhangye Basin is a torsion basin, which is favorable for thermal migration and enrichment, and belongs to medium-low temperature geothermal resources. The geothermal field thermal reservoir is Neogene and Cretaceous sandstone, glutenite, pebbly sandstone, with a thickness of 536 m;It is estimated by the potassium-magnesium geothermal temperature scale, the thermal storage temperature is 60℃;the caprock is the mudstone and argillaceous sandstone layer of the Neogene Upper Shulehe Formation;the heat source is from the deep heat conduction of the crust. Through the analysis and research on geothermal field characteristics, heat storage characteristics, heat storage temperature and temperature field characteristics in the study area, it can provide a basis for local governments to further research, explore and develop geothermal resources.