渤海湾盆地献县地热田开发程度较高，为精细构建地热田模型及评价地热资源提供了数据支撑。献县地热田在构造上属于渤海湾盆地沧县隆起献县凸起，凸起东侧为阜城凹陷，西侧为饶阳凹陷。研究区内主要发育孔隙型砂岩热储与岩溶性灰岩热储2类热储，以蓟县系雾迷山组灰岩热储为研究对象，采用多尺度离散裂缝三维精细地质建模方法，开展献县地热田地热资源评价。献县地热田地质构造模型采用确定性与随机建模相结合的方法构建，模型网格步长设定为25 m× 25 m，纵向上模拟300个层段（单层厚度1 m），总网格数为2 333.06×10⁴个。在测井二次解释结果约束下，建立雾迷山组岩相、物性及温度场地质模型。模型分析表明，献县地热田热储资源分布走向与献县凸起构造形态呈一定正相关关系：埋藏深度越浅，地热资源条件越好，并与已有井成井参数对比验证，模型适配性较好。采用基于精细热储地质模型的体积法评价区域内地热资源量，结果显示：献县地热田蓟县系雾迷山组热储存总量为2.881×10¹⁶ kJ，折合标准煤9.841×10⁸ t，总可回收热量为0.432×10¹⁶ kJ；热水体积为35.75×10⁸ m³，热水含热量0.105 ×10¹⁶ kJ，折合标准煤0.359×10⁸ t。上述结果证实献县地热田地热资源潜力巨大，该模型为后续开发工作提供了技术支撑与依据。

The Xianxian County geothermal field in the Bohai Bay Basin is highly developed, providing data support for the refined construction of geothermal field models and the evaluation of geothermal resources. Structurally, the Xianxian geothermal field belongs to the Xianxian County Uplift of the Cangxian County Uplift in the Bohai Bay Basin, with the Fucheng Depression to the east and the Raoyang Depression to the west. The main thermal reservoirs developed in the study area are porous sandstone thermal reservoirs and karst limestone thermal reservoirs. Taking the Wumishan Formation limestone thermal reservoir of the Jixian System as the research object, a multi-scale discrete fracture three-dimensional refined geological modeling method was employed to evaluate the geothermal resources of the Xianxian County geothermal field. The geological structure model of the Xianxian County geothermal field was constructed using deterministic and stochastic modeling methods. The model mesh was set with a step size of 25 m × 25 m, and 300 layers were simulated vertically, with a single layer thickness of 1 m and a total mesh number of 2 333.06 × 10⁴. Under the constraints of the secondary interpretation results of well logging, a geological model of lithofacies, physical properties, and temperature fields of the Wumishan Formation was established. The model analysis showed that the distribution trend of thermal reservoir resources in the Xianxian County geothermal field was positively correlated with the structural morphology of the Xianxian County Uplift. The shallower the burial depth, the better the geothermal resource conditions. Comparison with existing well completion parameter data further validated the model, indicating good adaptability. A volumetric method based on the refined thermal reservoir geological model was employed to evaluate the geothermal resources in the region. The results showed that the total thermal reservoir capacity of the Wumishan Formation in the Jixian System of Xianxian County geothermal field was 2.881 × 10¹⁶ kJ, equivalent to 9.841 × 10⁸ t of standard coal, with a total recoverable heat of 0.432 × 10¹⁶ kJ. The hot water volume was 35.75 × 10⁸ m³, and the heat content in the hot water was 0.105 × 10¹⁶ kJ, equivalent to 0.359 × 10⁸ t of standard coal. These findings confirm the huge potential of geothermal resources in the Xianxian County geothermal field, and the proposed model provides technical support and basis for the subsequent development in the Xianxian County geothermal field.