广东省五华县转水镇维龙地热田地热资源特征及储量评价  

Characterization of geothermal resources and evaluation of reserves in weilong geothermal field,Zhuanshui town,Wuhua county,Guangdong province,China

作　　者：杨伟 YANG Wei(Eighth geological brigade,Guangdong geological bureau,Meizhou,Guangdong 514089,China)

机构地区：[1]广东省地质局第八地质大队,广东梅州514089

出　　处：《地下水》2023年第6期53-57,共5页Ground water

摘　　要：通过收集广东省五华县转水镇维龙地热田区域地质构造资料及地质调查成果,圈定研究区地热异常带及热异常中心区,查明五华县维龙地热田主要热储层、断裂构造的分布及导热、储热特征。结合热矿水自流量和水温的动态观测、单井和群井降压试验结果,计算维龙地热田控制储量,并对研究区地热流体的水质质量进行评价。结果可知:(1)维龙地热田平面上呈现出北东、南西向展布,地热异常区范围呈条带状,两侧分别为花岗岩与侏罗系砂岩,构造成为热流体边界,边界由维龙地热田的地层、构造及岩浆岩共同控制形成。(2)维龙地热田热储平面分布及埋藏受构造和岩性共同控制。平面上为条带状,长轴展布方向为近北东向、北西向,最高泉温为94.0℃。热泉基本上垂直于北东向及北西向断裂成条带状分布,地热田总体流向推测为由地热异常区流向北东。(3)地热田规模分级属小型,地热流体属低温地热资源中的热水地热资源。地热田出水温度46℃~82℃,加权平均温度66.8℃。地热水利用的节煤量为7634.262 t/a。(4)地热田水化学类型以HCO3-Na型为主,属淡热矿水,维龙地热田地热水可命名为HCO_(3)^(-)Na型为主的理疗用氟、铁、硅热矿水。研究结论为后续地热资源开发利用与保护提供科学依据。Through the collection of regional geological and tectonic data and geological survey results of Wuhua county,Guangdong province,the geothermal anomaly zone and the center of thermal anomalies in the study area were identified,and the distribution of major thermal reservoirs and fracture structures,as well as the characteristics of thermal conductivity and storage in Wuhua county's weilong geothermal field were ascertained.Combined with the dynamic observation of thermal mineral water self-flow rate and water temperature,and the results of single and group well depressurization tests,we calculate the controlled storage capacity of the Weilong geothermal field and evaluate the water quality of the geothermal fluids in the study area.The results are considered:(1)weilong geothermal field shows a north-east and south-west spreading in the plane,the geothermal anomaly area is in the shape of a strip,and the two sides are granite and Jurassic sandstone,respectively,and the tectonic structure has become the boundary of the thermal fluid,and the boundary is formed by the stratigraphy,tectonics,and magmatism of weilong geothermal field together.(2)The distribution of thermal storage planes and burial in the weilong geothermal field are jointly controlled by tectonics and lithology.It is strip-shaped in plan,with the long axis spreading in the direction of nearly north-east and north-west,and the maximum spring temperature is 94.0℃.The hot springs are basically perpendicular to the north-east and north-west faults in a strip-like distribution,and the overall flow direction of the geothermal field is presumed to be from the geothermal anomaly area to the north-east.(3)The size of the geothermal field is graded as small,and the geothermal fluid is a hot water geothermal resource among the low-temperature geothermal resources.The water temperature out of the geothermal field ranges from 46 to 82℃,with a weighted average temperature of 66.8℃.The coal saving from geothermal water utilization is 7634.262 t/a.(4)The chemic

关 键 词：维龙地热田 地热资源特征 储量评价 

分 类 号：P314.1[天文地球—固体地球物理学]