基于Visual MODFLOW的昭关地热流场模拟及储量评价研究

Zhaoguan Geothermal Flow Simulation and Reserve Based on Visual MODFLOW Evaluation study

昭关地热田研究区位于安徽省含山县,地热地质系统平面分布范围大,为一北东向的狭长地带。通过运用地下水模拟软件Visual MODFLOW建立研究区水文地质概念模型和数学模型,对多年地热流量动态监测资料和流场对模型进行识别和验证,并对区域地热资源储量进行计算评价,结果显示:昭关地热田的分布以及地热的补给、储存、运移、排泄等都明显受地质构造和地层岩性的控制,地热温度为38℃~42℃,属低温地热中的温热水资源。采用热储法、解析法、数值法和统计分析进行了地热资源量计算得出,地热田热储中蕴藏的总资源量为3.639×1016J。研究结果为该研究区合理开发利用和保护地热资源提供了依据。

The Zhaoguan geothermal field research area is located in Hanshan County, Anhui Province. The geothermal geological system has a large plane distribution area and is a north - south, narrow strip. The groundwater simulation software Visual MODFLOW was used to establish the conceptual and mathematical models for hydrogeology in the study area. The geo- thermal flow monitoring data and flow field models for many years were identified and verified, and the geothermal resource re- serves were calculated and evaluated. The results showed that ： The distribution of geothermal fields and the supply, storage, migration and excretion of geothermal heat are all obviously controlled by geological structure and stratum lithology. The geo- thermal temperature is 38°2 to 42°C , and it is a warm and hot water resource in low - temperature geothermal. Using thermal storage method, analytical method, numerical method and statistical analysis to calculate the amount of geothermal resources, the total resource amount in geothermal field thermal storage is 3. 639 × 10^16J. The research results provide a basis for the ra- tional development, utilization and protection of geothermal resources in the study area.