湖北省宜昌市城区水热型地热资源赋存的地质特征及其开发利用意义初探

Geological Characteristics and Development and Utilization Significance of Geothermal Resources in Yichang City,Hubei Province

宜昌市城区东部发现优质地下热水资源。热储为奥陶系下统红花园组—寒武系下统天河板组云岩和云质灰岩,埋深1 500 m左右,总厚度> 750 m。经连续抽水试验,单井可采水量≥500 m3/d,水温48～49℃,水化学类型为SO_4、Cl-Ca、Na型低矿化水(淡咸水)。水中锶含量10. 52 mg/L,偏硅酸含量34. 18mg/L,氟含量3. 68 mg/L,属水质、水温均较好的理疗热矿水水源地,具有广阔的开发利用前景。

High quality underground hot water resources are found in the eastern part of Yichang city.The thermal reservoir is dolomitic limestone of Honghuayuan Formation of Lower Ordovician to Tianheban Formation of Lower Cambrian,and its burial depth is about1500m.The total thickness is greater than750m.After continuous pumping test,the single well can produce more than500m^3/d of water and the water temperature is48~49℃.The hydrochemical types are SO4,Cl-Ca and Na low mineralized water.Strontium(Sr)content in water is10.52mg/L,metasilicic acid(H2SiO3)content is34.18mg/L,and fluorine(F)content is3.68mg/L.It is a good source of physiotherapy and thermal minerals with good water quality and water temperature,and has broad prospects for development and utilization.