渭河盆地大地热流测量与地热系统热源机理研究

作为地球的本土可再生能源，地热能具有资源量大、利用效率高、成本低、节能减排效果好等诸多优点，是人类未来的重要替代新能源之一。热源解析是地热系统形成机理研究的基本内容之一，其基本方法是开展大地热流测量与岩石圈热结构精细研究。多种地质、地球物理资料表明，渭河盆地为被动裂谷盆地，其地热系统热源机理与主动裂谷盆地必定存在差异，而传统建立在主动裂谷盆地基础之上的渭河盆地地热系统热成因模式亦需要重新建立。本项目拟在深井稳态地温测量和岩石热物性测试基础上，开展渭河盆地地温场和岩石圈热结构精细研究，进而根据热异常分布及构造-水文地质条件，划分地热系统，解析代表性地热系统的热源机理——热源构成与构造-热通道，建立被动裂谷盆地地热系统的热源模式，评价渭河盆地典型地热系统地热资源潜力，为研究区地热资源的可持续勘探开发提供合理建议，助力渭河盆地地热资源开发利用“十三五”规划目标顺利实现。

As the local renewable energy, geothermal energy has many advantages, such as large amount of resources, high efficiency, low cost, good effect of energy saving and emission reduction. Therefore, geothermal energy is considered to be one of the most important alternative energy for the future of human beings. Heat source analysis is one of the basic contents on the formation mechanism of geothermal system. The basic method to analyze the heat source of the geothermal system is by the terrestrial heat flow measurement and lithospheric thermal structure calculation. A variety of geological and geophysical data show that the Weihe basin is a passive rift, which means that there must be differences in heat source mechanism of geothermal system between the Weihe basin and other active rifts. Accordingly, the thermal genetic model of the geothermal system in the Weihe basin, which was based on the active rift basin, also needs to be reestablished. The purpose of this project is to study the geothermal field and the lithospheric thermal structure of the Weihe basin on the basis of the temperature logging and the thermal physical properties measurement. Then, on the base of the thermal anomaly distribution and tectonic division of hydrogeological conditions, geothermal systems will be divided and heat source mechanism (heat source composition and tectonic-thermal channel) of representative geothermal systems will be analyzed. Finally, the geothermal resources potential in Weihe basin will be carried out and the heat source model of geothermal system in passive rifts will be build. The result of the project will lay the foundation for sustainable exploration and development and help realize the goal of geothermal resources development and utilization in the "13th Five-Year" planning in Shanxi province.