地质科技通报2025，Vol.44Issue(5)：3-12,10.DOI:10.19509/j.cnki.dzkq.tb20230590
基于多源融合建模和热-流耦合模拟的张掖盆地地热资源分布特征及成因机制
Spatial characteristics and genetic mechanisms of geothermal resources in the Zhangye Basin based on multi-source fusion modeling and heat-flow coupling simulations
摘要
Abstract
[Objective]The traditional temperature-pressure field analysis method relies heavily on the interpolation of existing borehole data,which fails to accurately characterize the coupled seepage-heat transfer processes in geothermal systems.This limitation hinders comprehensive understanding of formation mechanisms of geothermal resources.[Methods and Results]To address these issues,we constructed a three-dimensional geological model of the Zhangye Basin by integrating multisource datasets(borehole information,geophysical data,and digital elevation models).Our integrated approach enhanced the resolution of inter-well stratigraphic correlation by 50-300 m compared to conventional methods.Numerical simulations of coupled seepage-thermal processes revealed that multi-physical field coupling analysis(incorporating both temperature and pressure fields)outperforms traditional key-node spatial interpolation approach in reliability.The results show that the hydraulic head gradient decreases from the southeastern to the northwestern discharge area,and northeastward heat depletion patterns are attributed to reservoir shallowing and caprock thinning.The maximum temperatures of 78℃occurs at the basin center with peripheral cooling effects.A three-dimensional geothermal conceptual model was subsequently developed,synthesizing structural,hydrogeological,and thermal geological constraints.[Conclusion]By coupling this model with heat-flux simulations,our study demonstrates that it could provide more reliable interpretation of the northwestward groundwater migration and the rhombic-lobate spatial distribution of the geothermal anomalies.These findings provide a theoretical framework for targeting high-enthalpy geothermal reservoirs and optimizing sustainable exploitation strategies.关键词
张掖盆地/三维地质模型/地热资源/温压特征/成因机制/热-流耦合/多源融合Key words
Zhangye Basin/three-dimensional geological model/geothermal resource/temperature and pressure characteristics/genetic mechanism/heat-flow coupling/multi-source fusion分类
天文与地球科学引用本文复制引用
尹政,陈庆祥,何剑波,王春磊,骆进..基于多源融合建模和热-流耦合模拟的张掖盆地地热资源分布特征及成因机制[J].地质科技通报,2025,44(5):3-12,10.基金项目
甘肃省自然资源厅科技创新项目(202232) （202232）
甘肃省2023年度省级基础地质调查项目(202330) （202330）
湖北省自然科学基金项目"聚光太阳能地热温室储热系统能源转换效率研究"(2023AED197) （2023AED197）
