摘要
干热岩型地热资源是储量大、用途广的新型、可再生绿色能源,对其进行调查评价意义重大。本次从区域干热岩靶区选址、物探、钻探、岩芯取样测试、综合测井、抽注水试验、目的层压裂、热储评价等方面,系统地总结分析了干热岩型地热资源调查评价中涉及的关键技术。同时以利津干热岩GRY1孔进行说明,结果表明:虽然其天然裂隙率及渗透性较差,但经水力压裂后其渗透系数有大幅提高,压裂模式属于人工高压+天然裂隙复合压裂模式,在可控的孔口压力下能获得较大的注入水量,有利于干热岩资源的开发利用;干热岩做压裂试验时应选取天然裂隙发育段作为压裂试验的目的层,陈庄潜凸起区内埋深5000m范围内干热岩蕴藏的热资源量为2.654×1020J,折合标准煤90.21亿t;可利用资源量为5.29×1018J,折合标准煤1.804亿t。该研究对干热岩勘查开发工程场地选址、调查评价等方面具有一定指导意义。
Hot dry rock geothermal resource is a new type of renewable green energy with large reserves and potentially wide applications that should be better investigated and evaluated.This paper systematically summarizes and analyzes the key technologies involved in the investigation and evaluation of dry hot rock geothermal resources from the perspective of site selection,geophysical exploration,drilling,core sampling test,comprehensive logging,pumping and water injection test,target layer fracturing and thermal reservoir evaluation.At the same time,the GRY1 hole in Lijin,with poor natural fracture rate and permeability,is used to explain how its permeability coefficient has been greatly improved after hydraulic fracturing.The fracturing mode belongs to the artificial high pressure+natural fracture composite fracturing mode,which can obtain a large amount of injected water under the controllable orifice pressure,which is conducive to the development and utilization of hot dry rock resources.During the fracturing test of the hot dry rock,the development section of the natural hot fracture should be selected as the target layer of the fracturing test.In the Chenzhuang Latent uplift,the thermal resources of hot dry rock within 5000 m depth are 2.654×1020 J,equivalent to 9.021 billion tons of standard coal.The available resources are 5.29×1018 J,equivalent to 180.4 million tons of standard coal.This study has significance for guiding site selection,investigation and evaluation of hot dry rock exploration and development project.
作者
谭现锋
刘肖
王贵玲
王浩
TAN Xianfeng;LIU Xiao;WANG Guiling;WANG Hao(Shandong Provincial Lunan Geo-engineering Exploration Instituts(The Second Geological Brigade of Shandong Geological Exploration Bureau),Jining,Shandong,272100;Shandong Geothermal Clean Energy Exploration and Development Engineering Research Center,Jining,Shandong,272100;Institute of Hydrogeology and Environmental Geology,CAGS,Shijiazhuang,050061;The Second Institute of Hydrogeology and Engineering Geology,(Shandong Provincial Bureau of Geology&MineralResourcesShandong Provincial Lubei Geo-engineer Exploration Instituts),Dezhou,Shandong,253072)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2020年第7期2166-2176,共11页
Acta Geologica Sinica
基金
国家重点研发计划项目(编号2019YFB1504104)资助成果。
关键词
干热岩型地热资源
调查评价
大地热流值
勘查选址
hot dry rock geothermal resources
investigation and evaluation
geothermic value
exploration
site selection
