广东省沉积盆地型地热资源评价  

Evaluation of geothermal resources in sedimentary basins in Guangdong Province

作　　者：叶洪恩 吴玉婷 郭志 YE Hong-en;WU Yu-ting;GUO Zhi(The 4th Geological Brigade of Guangdong Geological Bureau(Zhanjiang Geological Disaster Emergency Rescue Technology Center of Guangdong Province),Zhanjiang 524049,China)

机构地区：[1]广东省地质局第四地质大队(广东省湛江地质灾害应急抢险技术中心),广东湛江524049

出　　处：《地下水》2024年第6期24-28,共5页Ground water

基　　金：广东省地质勘查与城市地质专项([2020-12])。

摘　　要：广东省内沉积盆地型地热田共有粤西雷州半岛盆地孔隙型地热田、粤西茂名盆地孔隙型地热田、粤东汕头澄海盆地孔隙型地热田、粤东潮州浮洋盆地孔隙型地热田、粤东潮州浮洋盆地孔隙型地热田与粤东潮州东凤盆地孔隙型地热田5处,根据各地热田的地热地质特征及利用相关水文地质参数对其进行资源评价,结果可知:广东省沉积盆地型地热资源总量为8.65×10^(16)kJ,地热资源可开采量Qwh为2.16×10^(16)kJ;采用最大允许降深法、开采系数法及考虑回灌条件计算的地热流体可开采量结果对比可见,最大降深法计算得流体可开采量的结果明显较另外两种计算方法的量少,采用回灌条件下计算的地热流体可开采量数值较大,但回灌条件下流体补给量更有保证。按照评价结果将广东省5处沉积盆地型地热田进行规模分级,雷州半岛盆地和茂名盆地无论是否考虑回灌条件,地热田规模均为大型,而其余三处沉积盆地型地热田的规模均为小型。There are 5 sedimentary basin geothermal fields in Guangdong province: Leizhou Peninsula Basin in western Guangdong, Maoming Basin in western Guangdong, Chenghai Basin in Shantou, Fuyang Basin in eastern Chaozhou, Fuyang Basin in eastern Chaozhou and Dongfeng Basin in eastern Chaozhou. According to the geothermal geological characteristics of the hot fields and the use of relevant hydro-geological parameters to evaluate their resources, the results are as follows: The total geothermal resources of sedimentary basins in Guangdong Province are 8.65×10^(16)kJ, and the exploitable geothermal resources Q_(wh) is 2.16×10^(16)kJ. The comparison of the results of recoverable geothermal fluid calculated by the maximum allowable depth reduction method, the mining coefficient method and the consideration of recharge conditions shows that the result of recoverable geothermal fluid calculated by the maximum depth reduction method is significantly less than that by the other two calculation methods. The value of recoverable geothermal fluid calculated under the recharge condition is larger, but the fluid recharge under the recharge condition is more guaranteed. According to the evaluation results, the five sedimentary basin-type geothermal fields in Guangdong Province are classified in scale. The Leizhou Peninsula basin and Maoming basin are all large in scale regardless of recharge conditions, while the other three sedimentary basin-type geothermal fields are all small in scale.

关 键 词：沉积盆地型地热田 孔隙型热储 地热资源评价 

分 类 号：P314.1[天文地球—固体地球物理学]