Geology and development of geothermal field in Neogene Guantao Formation in northern Bohai Bay Basin: A case of the Caofeidian geothermal heating project in Tangshan, China

DONG Yuexia,HUANG Hongxiang,REN Lu,LI Hongda,DU Zhiqiang,E Junjie,WANG Qi,ZHANG Xiaoming

Table 3. Parameters required to calculate geothermal re-sources and thermal water resources.

Horizon Surface area of the calculated area/106 m2 Thermal reservoir thickness/m Average temperature of rocks and water/°C Reference tempera- ture/°C Density of rock/(kg·m-3) Density of water/(kg·m-3) Specific heat capacity of rock/(J·(kg·K)-1) Specific heat capacity of water/(J·(kg·K)-1) Porosity of rock/% Head height/m Elastic water release coefficient Member I 328 81 76 13.5 2 200 990 878 4 180 27 80 8.56×10-5 Member II 328 78 79 13.5 2 200 990 878 4 180 29 80 8.56×10-5 Member III 328 90 83 13.5 2 200 990 878 4 180 29 80 8.56×10-5