北京平谷地区万庄子-镇罗营背斜地热地质条件研究

A Study on the geological conditions of anticline geothermal resources in Wanzhuangzi-Zhen Luoying Pinggu Beijing

万庄子-镇罗营背斜位于平谷区西北,属北京北部山区。在前人研究的基础上,搜集相关资料,通过地球物理、地球化学、地质钻探等多种手段,利用地质构造分析、井与物探结合分析、地热地质综合研究等方法,开展万庄子-镇罗营背斜地热地质条件研究。通过研究,指出西牛角峪-江米洞断裂、大华山断裂、后北宫断裂控制该地区构造演化,为导热导水断裂。提出片麻岩中寻找地热资源的关键是寻找导热导水的深大断裂。明确太古宇密云岩群片麻岩可以作为很好的地热储层,万庄子-镇罗营背斜及周边具备地热资源赋存的基本条件,为地热勘探开发有利区。万庄子-镇罗营背斜及周边地热井钻凿需寻找盖层条件较好的断裂发育带。

Wanzhuangzi-Zhen Luoying anticline is located in the northwest of Pinggu District,belonging to the northern moun-tainous area of Beijing.On the basis of previous survey data,and with geophysical,geochemical,and drilling researches,this paper carries out geological structure analysis,well and geophysical exploration analysis,and comprehensive geothermal and geological study of this area.The results show that Xiniujiaoyu-Jiangmidong fault,Dahua Mountain fault and Houbeigong fault control the re-gional tectonic evolution.These faults have certain thermal and water conducting capabilities.Suggestions are then made that the key to find geothermal resources in gneiss is to find the deep fracture of heat conduction and water conduction.The Archean mi-yun Group gneiss can be used as a good geothermal reservoir.Wanzhuangzi-Zhenluoying anticline and surrounding areas have the basic conditions of geothermal resources occurrence,and so are favorable for geothermal exploration and development.To con-duct Wanzhuangzi-Zhenluoying anticline and surrounding geothermal wells drilling,it is necessary to find the fault development zones with good overlying strata.