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摘要:
研究目的 广西地热资源分布广泛，是一种极具竞争力的低碳可再生清洁能源。目前，针对广西地热资源赋存规律、分布特征和资源潜力的系统性研究相对薄弱，在一定程度上制约了广西地热资源的综合性开发和利用。
研究方法 本文基于“十二五”以来广西浅层地温、水热型和干热型地热资源调查评价最新成果，对广西壳幔圈层结构、现今地温场特征和地热资源分布规律进行系统性分析；采用不同的资源量估算方法，分别对浅层地热能资源、水热型地热资源和干热型地热资源的开发利用潜力进行评价。
研究结果 研究表明，广西地热资源丰富，发育明显的赋存规律和分区分带性特征。其中，广西浅层地热能资源和水热型地热资源均以直接利用为主要开发方式，13个主要城市浅层地热能资源总热容量为1.23×1015 kJ/℃，年可开采利用资源量为1.36×1012 kJ/a，折合标准煤1.67×108 t；广西现有温（热）泉出露点24处，地热开采井28口，地热能资源总量为2.56×1017 kJ，折合标准煤87.58×108 t；地热流体年可采热量为28.89×1012 kJ/a，折合标准煤315.65×104 t。广西干热型地热资源量潜力巨大，陆域3~10 km范围内干热岩资源总量为55.42×104 EJ，折合标准煤18.91×1012 t，按2%的可采率计算是中国2020年一次能源消耗总量（49.8亿t）的75.94倍，是最理想的传统化石能源的接替载体。
结论 广西在传统能源领域“缺煤、少油、乏气”，但在新能源领域具有“风大、水足、热持久”的优势，对地热资源的合理开发利用将有助于广西能源结构的优化和产业结构的战略性调整，助力于中国“双碳”目标的达成。
Abstract:This paper is the result of geothermal resources survey engineering.
Objective In Guangxi, the geothermal resource is extensively distributed, and is a competitive low-carbon, renewable and clean energy. Up to now, the systematic research on the occurrence regulation, distribution characteristics and potential of geothermal resources is relatively weak, to a certain extent, which restricts the comprehensive development and utilization in Guangxi.
Methods In this paper, we systematically analyzed the structure of the crust and mantle layer, the present characteristics of the geothermal field and the distribution pattern of geothermal resources, based on the latest results of the survey and evaluation of shallow geothermal, hydrothermal and hot dry rock geothermal resources in Guangxi since the "Twelfth Five-Year Plan". And we chose different methods to evaluate the development and utilization potential of shallow geothermal energy resources, hydrothermal geothermal resources and hot dry rock geothermal resources.
Results The research shows that the geothermal resources are rich in Guangxi, with obvious occurrence rules and zoning characteristics. In 13 major cities, the shallow and hydrothermal geothermal resources are mainly developed through direct utilization, and the shallow geothermal resources are 1.23×1015 kJ/℃, the annual exploitable resources are 1.36×1012 kJ/a, equivalent to 1.67×108 t standard coal. And 24 warm(hot) springs points and 28 geothermal mining wells locating in Guangxi, the total amount of geothermal energy resources is 2.56×1017 kJ, which is equivalent to 87.58×108 t of standard coal. On the other hand, the annual recoverable heat of geothermal fluid is 28.89×1012 kJ/a, which is equivalent to 315.65×104 t of standard coal. Finally, the potential of dry hot geothermal resources is great in Guangxi, within 3-10 km of the land area, the total amount of hot dry rock resources is 55.42×104 EJ, which is equivalent to 18.91×1012 t of standard coal, at a recoverable rate of 2% which is 75.94 times the 2020 Chinese primary energy consumption(4.98 billion tons). Therefore, it is becoming the most ideal replacement carrier for traditional fossil energy.
Conclusions Guangxi is lack of coal, oil and gas in the traditional energy field, and has rich wind, water and heat in the new energy field. The rational development and utilization of geothermal resources will contribute to the optimization of energy structure and the strategic adjustment of industrial structure in Guangxi, and help to achieve the "dual carbon goal".
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表 1 广西典型中深孔地温监测统计（据康志强等，2020修编）
Table 1. Statistical table of ground temperature monitoring in typical in middle and deep holes in Guangxi(modified from Kang Zhiqiang et al., 2020)
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表 2 广西13个主要城市浅层地热能热容量、换热功率计算汇总
Table 2. Summary of the calculation of heat capacity and heat transfer rate of shallow geothermal resources in 13 major cities in Guangxi
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表 3 广西主要隆起山地型地热资源评价
Table 3. Evaluation of geothermal resources of main uplifted mountains in Guangxi
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表 4 广西主要沉积盆地型地热资源评价
Table 4. Evaluation of geothermal resources of main sedimentary basins in Guangxi
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表 5 广西陆域3~10 km干热型地热资源评价
Table 5. Evaluation of hot dry rock geothermal resources at the depth of 3-10 km in Guangxi's land area
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