湖南汝城地区干热岩资源前景及参数孔选址研究  

Study on Hot Dry Rock Resources Prospect and Stratigraphic Well Siting in Rucheng Area, Hunan

作　　者：杨汉元 Yang Hanyuan(Oil and Gas Resources Exploration Team,Hunan Coalfield Geology Bureau,Changsha,Hunan 410014)

机构地区：[1]湖南省煤田地质局油气资源勘探队,长沙410014

出　　处：《中国煤炭地质》2020年第6期41-47,共7页Coal Geology of China

摘　　要：通过对湖南汝城地区的地层、构造、花岗岩体分布特征及地热地质特征等综合分析研究,发现区内广泛分布了大量的花岗岩岩体。通过对区内不同岩体的花岗岩岩样进行测试,发现区内岩浆岩的大地热流值较高,盖层的热导率较低,且区内地热异常明显,地温梯度和大地热流值平均值均较高,利用体积法公式,估算区内干热岩资源量可达到6.93亿t标准煤。依据以往干热岩选址的地热地质学指标体系,从区内岩体分布、盖层情况、深部热异常及区域稳定性等方面进行了综合分析,建议该区在F8断裂下盘布设参数试验孔可获得较好的干热岩资源。Through integrated analysis and study on stratigraphy,structure,granite mass distribution features and geothermal geological features in the Rucheng area,Hunan have found substantial granite masses widely distributed in the area.Based on tested results of granite samples from different granite masses in the area have found that the magmatic rocks in the area have higher terrestrial thermal current values,while the thermal conductivity of overburden is rather low and geothermal anomaly obvious in the area;mean values of geothermal gradient and terrestrial thermal current are rather high.Using volumetric method formula estimated hot dry rock resources in the area can be 963 million tons equivalent of coal as high.According to previous hot dry rock siting geothermal geological indicator system carried out synthetic analysis from aspects of rock masses distribution in the area,overburden situation,deep thermal anomaly and regional stability.Finally has proposed that better hot dry rock resources can be obtained through test stratigraphic wells layout on fault F3 footwall.

关 键 词：干热岩 花岗岩 地热异常 地温梯度 湖南汝城地区 

分 类 号：P314[天文地球—固体地球物理学]