Geothermal exploration work under complex geological conditions is currently an urgent technical problem to be solved.The research area is located in the suburbs of Wudu District,Longnan City,Gansu Province.The structure is complex,the terrain is strongly cut,and human interference is severe.Conventional geophysical methods are difficult to carry out,making it difficult to achieve ideal exploration results.Therefore,the overall level of geothermal exploration and development is relatively low.This study used a combination of wide area electromagnetic measurement and micro motion measurement technology to basically identify the geological structure and groundwater occurrence characteristics of the study area.In depth research was conducted on the deep thermal reservoir,cap rock characteristics,water conductivity and heat control structures,providing geophysical basis for the reasonable arrangement of exploration and production combined holes.Finally,a groundwater hot water with a wellhead water temperature of 48 ℃ and a water output of 2 000 m3/d was obtained.Through this study,it is believed that the anti-interference technology method based on"wide area electromagnetic method+micro motion detection"can achieve good application results in the exploration of deep geothermal fields in complex geological conditions,urban human activities,and strong electromagnetic interference environments.
geothermal explorationwide field electromagnetic method(WFEM)micro motion measurementLongnan Mountain Area
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