广西柳州市北部地区地热资源调查及远景分析

Investigation and prospective analysis of geothermal resources in the north of Liuzhou City,Guangxi

广西柳州市周边地区拥有较丰富的地热资源,为配合该市生态文明建设的需要,了解柳州市北部地区地热资源条件,在沙塘镇留休一带实施了重力测量及CSAMT测量等综合物探研究工作,结合研究区及其外围地区的水文地质、地热地质及钻探资料,查明了研究区及其附近地区地层、构造和岩浆岩分布特征,以及与地热异常显示的关系,地热资源的“生—储—盖”成藏条件,圈定了热储层空间分布与富集区带,建立了研究区地热系统模型。综合研究结果表明,柳州市北部地区生热条件与储热条件良好,上覆盖层厚度较大,热储存空间及深度范围适宜,地下水源补给较为充裕,该地区拥有较为理想的地热地质条件,研究成果可作为该区今后地热资源开发与利用的重要指导参考意见。

There are abundant geothermal resources at the surrounding area of Liuzhou City in Guangxi.In order to meet the construction requirement of ecological civilization in Liuzhou City and to explore for the geothermal resources condition in the north area of Liuzhou City,the paper has implemented the comprehensive geophysical exploration research work of gravity survey and CSAMT method in Liuxiu Village of Shatang Town.According to the hydrogeology,geothermal geology and drilling data of the research area and surrounding area,the characteristics of strata,structure and magmatic rocks in the study area and its surrounding area,their relationship with geothermal anomaly,and the"source-reservoir-cap"reservoir forming condition of geothermal resources is found out.The spatial distribution and enrichment zone of thermal reservoirs is delineated,and the geothermal system model is established for the study area.The comprehensive study result shows that the Shatang area of Liuzhou City has a good heat generation and storage condition,the large thickness of caprock,the appropriate depth of heat storage space,abundant groundwater supply and ideal geothermal geological condition.The research result can provide an important guidance for the future development and utilization of geothermal resources in this area.