龙岩地区地下热水资源地质特征及开发利用探讨

Discussion on exploitation and the geological features of geothermal water resources in Longyan area

龙岩地区有温泉及地热点共31处,总流量为260.9L/s,已探明有7处,可采热水量112.59L/s。预测全区可采热水量380L/s以上,可采热量58 963kW,年可利用热能量3.05×109(MJ/a),相当于10.4万t/a标准煤中型煤矿的年采煤量。水质类型为HCO3—Na或HCO3—Ca型,部分达理疗热矿水命名标准。均属低温地热资源,热源主要为深部岩浆余热和花岗岩体中放射性元素衰变。可分为带状和层状2种热储类型:带状热储主要沿北西构造贮存于侵入岩和火山岩的构造破碎带中;层状热储主要贮存于沉积岩中。

There are 31 poits of the hot spings and geotherm in Longyan area,which have been found 7 areas.The total flow are 260.9L/s and recoverable heat content are 112.59L/s.Forecasting the recoverable heat content reached more than 380L/s in all-region and the recoverable heat reached more than 58963kW.Used heat are 3.05×109（MJ/a）ayear which are equivalent to annual coal output of the 10.4万t/a standard medium sized coal mines.The water quality type are HCO3-Na or HCO3-Ca type,Partially achieved the physiotherapy hot mineral water standard.The heat mainly are the deep magmatic heat and the radioactive decay in granite which are Low temperature geothermal resources.Divided into the bands and layered heat storage types,Banded thermal reservoirs mainly stored in the fracture zone of tectonic intrusive rock and volcano rock along the NW structure,and Layered thermal reservoirs mainly stored in sedimentary rock.