黑龙江国土资源

本文以宁海县深甽镇地热田为研究区域，旨在揭示断裂构造对地热流体的控制机制及富集规律。通过野外地质调查、地球物理探测与地球化学分析，系统研究了NE向与NW向断裂的几何学特征、活动性及其控热作用。结果表明，断裂交汇区形成高渗透性裂隙网络，主导热流体垂向深循环(2000～3000m)与浅部富集，热储层温度达40～62℃,氟、硅等微量元素显著富集。构建了“深循环加热-断裂交汇富集-封闭性调控”三位一体的断裂控热型地热系统模型，评估总热储资源量为1.2×10¹⁸J,优先开发区(F1断裂西侧)具备温泉疗养与低碳供暖开发潜力。研究成果为地热资源科学开发与生态保护提供理论支撑。

This paper takes the geothermal field in Shen zhen Town, Ninghai County as the study area, which aims to reveal the control mechanism and enrichment law of fault structures on geothermal fluids.Through field geological survey, geophysical exploration and geochemical analysis, the geometrical characteristics, activity and heat control effects of Ne-direction and NW-direction faults are systematically studied.The results show that a highly permeable fracture network is formed in the fracture intersection area, dominant in the vertical deep circulation(2000-3000m) and shallow enrichment of thermal fluids.The temperature of the thermal reservoir reaches 40-62℃,and trace elements, such as fluorine and silicon, are significantly enriched.A three-in-one fault heat control type geothermal system model of “deep circulation heating-fault convergence enrichment-closure regulation” was constructed.The total heat reserve resource is evaluated to be 1.2×10¹⁸J.The priority development zone(west side of F1 fault) has the potential for hot spring therapy and low-carbon heating development.The research results provide theoretical support for the scientific development and ecological protection of geothermal resources.