An analysis of the genesis and water quality characteristics of the geothermal field in Wudang District, Guiyang

Abstract：Guizhou Province has rich geothermal resources, and the geothermal field in Wudang district is one of the concealed geothermal resources in Guiyang City.?Mode of occurrence, recharge, flow and drainage conditions of the geothermal field were analyzed according to drilling data and regional geological data. The main geothermal reservoir is middle Cambrian-Ordovician limestone and dolomite. Characteristics of geothermal water runoff and geothermal field are controlled by a series of structures such as Wudang fracture and Wudang anticline.Temperature curve shows that the temperature gradient of Baoli No. 2 drill hole is about 2.59 ℃ / 100m and that of Baoli No. 3 drill hole is about 2.25 ℃ / 100m. There is no additional heat source in this area. Deep circulation is the main origin of geothermal water. The chemical type of geothermal water is SO4-Ca·Mg, and content of fluorine and silicon is relatively high, so the geothermal water has some medical value. Geothermal reinjection technology should be studied to achieve the sustainable development of geothermal resources in the future.