A Joint Method Based on Geochemistry and Magnetotelluric Sounding for Exploring Geothermal Resources in Sedimentary Basins and Its Application

The precise exploration of the characteristics geothermal fields in sedimentary basins, such as temperature and burial depth their deep reservoirs, is great significance for improving probability penetration reducing risks development costs. This study proposed a joint method combining magnetotelluric (MT) sounding geothermometers. Using this method, estimated reservoirs’ circulation water Xianxian field, typical field large basin northern China, prepared maps reservoirs. main results are follows. First, bedrock’s reservoirs with karst fissures have potential development. Among them, Jixianian Wumishan formation top 1100–1500 m thickness 700–1700 m, Gaoyuzhuang 3700–4000 maximum drilled 400 m. mainly medium low temperatures 138–160 °C 5873