Geological characteristics and resource evaluation of Pixia geotherm in Ningdu County, Jiangxi Province

Based on the relevant data obtained from borehole ZK1 in Pixia area of Ningdu County, Jiangxi Province, the geothermal characteristics and resources are preliminarily evaluated and the recoverable resources and geothermal capacity of ZK1 borehole are calculated by analyzing the geothermal field, base temperature, circulation depth, heat generation rate of rocks, terrestrial heat flow and hydrochemistry. The wellhead temperature of geothermal water in the study area is 45 ℃, belonging to HCO₃·SO₄-Na type, which can be named as fluorine water, silicon water, warm water and fresh water. The recoverable resource of borehole ZK1 is 759.89 m³/d, with the W_t thermal power of 964.76 kW and annual capacity of 5.07×10⁷ MJ.