深部超临界热储流体-岩石综合电性特征与电磁响应研究

地热是清洁、可持续的新能源。干热岩资源量巨大，通过人工储层改造的增强型地热系统（EGS）是重要发展方向。常规EGS发电经济效益较低，超临界地热能够提取常规EGS十倍以上能量，成为新兴能源发展方向。但岩石-流体复杂介质在超临界情况下物理性质尚不清楚，影响资源勘探与开发。本项目以岩石地球物理实验室和吉林大学综合极端条件实验装置为依托，以国际典型高温地热体为目标，结合我国潜在高温异常区，通过高温高压岩石物理试验和热-压-岩石-流体综合超临界地热系统综合模拟计算，研究深部超临界地热热储电性参数随温度、压力的变化规律；在热—流体—岩石物性综合多尺度随机等效介质模型的基础上，建立关键热储参数与电性参数的关联关系，揭示深部超临界热储电磁响应机制，为优选地球物理组合方法和敏感属性参数提供依据和理论支撑，以采集的数据处理和反演解释为基础，建立超临界地热资源勘探、开发和监测中异常解释理论与方法。

Geothermal energy is a clean and sustainable energy resource. The Dry hot rock(DHR) resources are huge, and the Enhanced geothermal system is an important development direction through artificial reservoir reconstruction by DHR. The economic benefit of conventional EGS power generation is low, and the supercritical geothermal energy can extract more than 10 times the energy of conventional EGS, which has become a new energy direction. However, the physical properties of rock-fluid system in supercritical condition are not clear, which affects the exploration and development of its resources. In this project, aimed at the international typical supercritical geothermal reservoir, combined with the potential high temperature abnormal area in China, we will carry out the high temperature and high pressure rock physics experiment and simulate response of thermal-pressure-rock-fluid integrated supercritical geothermal system, and study the variation of electrical parameters with temperature and pressure on the basis of a multi-scale random equivalent medium model. We will establish the relationship between key thermal storage parameters and electrical parameters. Based on the electromagnetic response mechanism of deep supercritical thermal reservoir, we will provide the basis and theoretical for the optimization of exploration methods and sensitive attribute parameters. On the basis of data processing and inversion interpretation, we will establish the theory and technique of anomaly interpretation in exploration, exploitation and monitoring of supercritical geothermal resources finally.