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- W2016354808 abstract "The partial pressures of CO2, H2S and H2 in geothermal reservoir waters are fixed by temperature-dependent mineral equilibria. The dissolved gases have a significant effect at which depth the rising hot waters start to boil, if their temperature exceeds 250°C and, particularly, when it exceeds 300°C. The following functions describe the temperature dependence of PCO2, PH2S and PH2, respectively: log PCO2 = -2.81 − 5012.7T-1 − 0.00919T + 6.464 log Tlog PH2S(s) = -18.75 − 24738.9T-1 − 0.10133T + 43.170 log Tlog PH2S(d) = -2.76 − 5758.2T-1 − 0.00850T + 6.359 log Tlog PH2(s) = -10.14 − 17763.1T-1 − 0.04084T + 23.368 log Tlog PH2(d) = 9.85 + 7290.3T-1 + 0.07202T − 22.651 log T where P is partial pressure (in bars abs.); and T is temperature (in kelvins). Two functions are given for each of H2S and H2. One set (indicated by subscript d) is valid for all waters < 200°C and waters in the range 200–300°C if chloride concentrations are < 500 ppm. The other set (indicated by subscript s) is valid for all waters > 300°C and waters in the range 200–300°C if containing > 500 ppm Cl−. It is considered that the temperature functions are valid for waters in basaltic to acidic volcanic rocks and also for some waters, at least, in sedimentary rocks. The following function describes crudely total gas pressure plus PH2O in geothermal systems: log Ptotal = 0.00543 − 621.4T−1" @default.
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- W2016354808 date "1985-06-01" @default.
- W2016354808 modified "2023-10-09" @default.
- W2016354808 title "Gas pressures in geothermal systems" @default.
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- W2016354808 doi "https://doi.org/10.1016/0009-2541(85)90164-0" @default.
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