Table . Brine and gas composition at wellhead at Soultz-sous-Forêts (S1 and G1) and Rittershoffen (S2 and G2). Oxygen concentration is not mentioned but rather the remaining 1% represents oxygen, hydrogen, helium, Ar, H2S, and ethane. For modelling purposes, the remaining 1% was assumed to be oxygen. Brine composition at Rittershoffen and Soultz-sous-Forêts taken from . Gas compositions and GLR from . Although this study does not explicitly state the bubble point pressure, it specifies that the operating pressure in these two geothermal plants was selected so that the surface facilities are operated below the degassing point. Considering that all the information required for predicting the bubble point pressure is available, the calculated Pb is compared to the operating pressure in Figure . Both PHREEQC and Reaktoro predict a bubble point pressure slightly below the operating pressure. The calculated bubble point pressures are thus consistent with the fact that at 23 and 25 bar, respectively, the geothermal plants at Soultz-sous-Forêt and Rittershoffen are operated above the degassing pressure.