浙江湖州太湖南岸地热资源研究

浙江湖州太湖南岸有多处地热异常显示,异常点水温为25℃～31℃,水中的氟、偏硅酸和游离二氧化碳达到或接近国家医疗热矿水标准值,具有一定的开发利用价值。通过大量调查和以往地质成果资料的分析研究,建立了地热形成模式和热储概念模型,认为区内存在二叠系栖霞组、石炭系船山组和黄龙组灰岩以及泥盆系五通组、志留系茅山组砂岩两个热储层;北东向的学川—湖州、北西向的长兴—奉化和东西向的湖州一嘉善大断裂是区内的主要导热热构造,且近期有活动迹象,为地下热水的形成创造了条件;石炭系上统高骊组、二叠系龙潭组与堰桥组的页岩、泥岩,第四系的粘土层是良好保温层。研究成果对开发本区的地热资源有一定的参考价值。

A Study on Geothermal Resource in South Bend Area of Taihu Lake,Huzhou,Zhejiang

There are many geothermal anomalous indications in south bend area of the Taihu Lake.Water temperatures of anomaly points are 25~31oC,contents of fluorine,metasilicic acid and free carbon dioxide up to or near the state medical thermomineral water standard,thus have certain exploitation and utilization values.Through extensive investigation and analytical study of previous geological data,geothermal forming mode and geothermal reservoir conceptual model have been modeled.Think that Permian Qixia Formation,Carboniferous Chuanshan Formation,Huanglong Formation limestone and Devonian Wutong Formation,Silurian Maoshan Formation sandstone two geothermal reservoirs are existed.NE Xuechuan-Huzhou,NW Changxing-Fenghua and EW Huzhou-Jiashan mega faults are main heat-conducting structures and have near term mobilization evidences,thus provide conditions for geothermal water formation.Shale and mudstone in Upper Carboniferous Gaoli Formation,Permian Longtan and Yanqiao formations,Quaternary clay beds are good isolation layers.The study result has certain referential significance in the exploitation of geothermal resource in the area.