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 2. Salinity and ion concentration of the Guantao Formation water in the Gaoshangpu-Liuzan geothermal field.

No. Well No. Salinity /(g·L-1) Na+/(mg·L-1) K+/(mg·L-1) Mg2+/(mg·L-1) Ca2+/(mg·L-1) F-/(mg·L-1) Cl-/(mg·L-1) SO42-/(mg·L-1) CO32-/(mg·L-1) HCO3-/(mg·L-1) 1 High-thermal 4-1 1.1 345.58 6.63 2.90 14.10 8.91 146.06 29.21 507.56 2 High-thermal 4-2 1.2 333.56 4.97 1.26 8.25 10.93 126.83 31.16 502.28 3 High-thermal 4-3 1.5 341.39 5.75 1.42 10.10 11.12 133.26 30.51 506.90 4 High-thermal 4-4 2.4 344.03 5.94 1.50 12.72 11.32 130.07 27.27 510.20 5 High-thermal 4-5 1.5 388.09 8.82 1.55 20.44 11.42 152.22 29.21 514.16 6 High-thermal 5-2 1.3 394.23 9.05 2.26 22.56 11.74 143.97 0.68 32.46 549.14 7 High-thermal 5-4 1.1 391.52 7.73 3.18 20.98 11.96 148.71 1.12 29.21 549.14 8 High-thermal 5-6 2.1 324.36 3.31 1.01 10.05 12.20 113.87 29.21 548.48 9 High-thermal 6-1 2.3 335.98 6.87 0.98 12.67 13.98 99.25 38.95 587.42 10 High-thermal 6-3 2.0 348.22 11.24 2.34 13.98 15.15 110.04 38.30 534.62 11 High-thermal 6-5 2.5 332.47 4.89 0.87 8.28 15.21 103.11 34.41 608.54 12 High-thermal 7-1 2.2 329.47 11.74 0.85 8.24 16.09 101.47 35.71 559.04 13 High-thermal 7-2 1.9 359.64 13.52 1.94 14.18 16.39 125.67 37.00 550.46 14 High-thermal 7-4 2.8 345.58 6.63 2.90 14.10 8.91 146.06 35.06 571.58