息烽新萝地热井成因浅析  

Genesis of the Xinluo Geothermal Well in Xifeng,Guizhou Province

作　　者：李志成 申娴达 

机构地区：[1]贵州省有色金属和核工业地质勘查局七总队,贵州贵阳550005

出　　处：《地质与勘探》2014年第6期1155-1159,共5页Geology and Exploration

基　　金：国家自然科学基金项目(编号40903018;40634020和40773020)资助

摘　　要：贵州息烽县城南新萝地热探采结合井位于洋水背斜西翼南倾伏端,洋水背斜为勘查区主要热储构造,近东西向的区域性白马洞大断层为该区的热源通道。储热单元为寒武系金顶山组(1j)、震旦系灯影组、洋水组(Zbdn+y);盖层为寒武系金顶山(1j)、明心寺组(1m)、牛蹄塘组(1n)的页岩、砂岩、粘土岩;热储层为震旦系灯影组、洋水组(Zbdn+y)粉-细晶白云岩、块状内碎屑白云岩、藻屑白云岩。地热井开采深度2500余米,最大开采量约1500 m3/d,热矿水井口温度46℃,为低温温热水地热资源。热矿水水化学类型为弱碱性水锶矿泉水,勘查类型热储类型为带状与层状组合热储(Ⅱ-3型)。Located in Xifeng county,Guizhou Province,the Xinluo geothermal well for both exploration and production lies at the south-dipping end of the Yangshui anticline that is the primary heat-reserve structure. And the EW-trending Baimadong fault serves as the path of heat transportation. The heat-reserve units involve the Jindingshan Formation of Cambrian and Dengying Formation of Sinian. The cover includes shale,sandstone and clay rocks in the Jindingshan,Mingxinsi,and Niutitang formations of Cambrian. Heat reservoirs are powder-fine crystal dolomitite,massive clastic dolomitite,and maerl dolomitite. This well is more than 2,500 meters deep,with production about 1500 m3/ d,and thermal mineral water temperature of 46℃,as a geothermal resource of low-temperature warm water. In hydrochemistry,the thermal mineral water is of strontium mineral water with weak alkalinity. And in exploration it is attributed to a combined belt-and layer-like thermal reservoir( Ⅱ- 3 type).

关 键 词：地热 低温热矿水 弱碱性水锶矿泉水 Ⅱ-3勘查类型 平均地热增温率 

分 类 号：P314[天文地球—固体地球物理学]