| Title | Feasibility Study on Geothermal Large-scale Development in Yutai County, Shandong, China |
|---|---|
| Authors | ?? ?, ? ?, ?? ?, ?? ?, ?? ? |
| Year | 2023 |
| Conference | World Geothermal Congress |
| Keywords | geothermal, feasibility study, large-scale development, district heating，dehydration and drying, Yutai county |
| Abstract | There are 653 km2 of land area in Yutai county, Shandong province, China. Even no geothermal exploration was carried out locally, but there are rich data for subsurface geological structure from coal mining at adjoining areas. Jurassic and Permo-Carboniferous systems with covered Quaternary deposits form good caprock. It made the fracture and karst limestone of Cambrian and Ordovician systems to be ideal reservoir at about 2,000 m depth. A geothermal well drilled 2,309 m in depth and yielded 68.5℃ thermal water. The temperature of well bottom in Ordovician limestone reservoir is 74.5℃. So local geothermal gradient is 2.62℃/100m. It could be intended that the Cambrian limestone reservoir would yield geothermal water in higher temperature. Those potential reservoirs distributed in most part of the county underground. Such geothermal resources could be explored and developed in large-scale size. Produced geothermal water could be used in district heating to replace existing coal boiler heating in county town. And local main specialty crop pepper could use geothermal for dehydration and drying in summer-autumn. It would save rather electricity and cost. Geothermal use could combine with ground source heat pump and subsurface heat storage. This will be great support for local government’s work program on reducing coal consumption. Geothermal development will contribute a result to much reduce carbon dioxide emission and improve environment. And it will create a new geothermal industry and gain remarkable economic benefits. |