Investigation On Characteristics Of Xiadian Fault And Its Control On Geothermal In Southeastern Area,Beijing

Geothermal resources are rich in Southeastern area,Beijing.As the urban development of Beijing's economic development zone,this area is about to usher into large-scale development and utilization,accompanying with a huge demanding for clean energy resources.Geothermal resources,the only clean energy in this area,wasfocus on concered.Accompany with an insufficientgeothermal Geological work and complexgeothermal geological conditions,and geothermal resources development has high economic risk in this area.These issues become obstacles in planning for geothermal exploration and development schemes,geothermal resources utilization and growth of the geothermal industry.In October 2015,a successful geothermal well with a water temperature of 92?was successfully drilled along the Xiadian fault in the southeastern area of Beijing,which achieved the breakthrough of the exploration of the geothermal geothermal resources in this area.Considered with the actual situation in this area,the key question is to study the the distribution of geothermal resources with the exist of the fault structure.The anomaly areas of geothermal(geothermal gradient>2.5?/100m,area 470 km~2)in the southeastern part of Beijing include parts of Tongzhou District and Daxing District,Beijing.Based on the analysis and summarization of geological and geothermal geological conditions in the work area,a variety of geophysical survey work has been carried out,supplemented by pumping test and water sample analysis and analysis,two key questions has been settled.The main conclusions summarized from the study are as follows:1)Xiadian fault is the main fault structure in the area,spreadedfrom the Yongledian northwest to Xiji,tend to South East,the inclination of more than 70°.2)The distribution characteristics of geothermal resources in studying area are remarkably controlled by the Xiadian fault.Rock in both sides of the fault was broken and the broken belt of rock is the main water,thermal channel.3)Geothermal geologic conditions in the working area is good,and especially in the the contal zone of Xiadian Fault.It is expected to obtain medium temperature geothermal resources in the Xiadian fault control zone.