Table . Ionic composition of the fluids. Besides the gases included here, the original reference reports also a lower content of other gases such as ethane, hydrogen, which add up to 1.2% (mol). These minor gases have not been included in the simulation. Generally, the calculated bubble point pressures with both Reaktoro and PHREEQC are very similar and in good agreement with the experimental observations (Figure ). The degassing pressures calculated in the work of Baumann using PHREEQC are slightly higher than our predictions. The differences could most likely be attributed to differences in the model implementation. For instance, in PHREEQC, Baumann defined CH4, C2H6, and N2 within an "EQUILIBRIUM_PHASES" block, whereas the CO2 and H2S were added as a "GAS_PHASE". In our implementation, only a "GAS_PHASE" of fixed pressure containing all gas components was defined. Further discrepancies might have arisen from the fact that we did not define the concentration of lower concentration gases (e.g., ethane with a molar concentration below 1%). To close the material balance for the gas phase and also account for the lighter gas fractions, we included a slightly higher concentration of methane (i.e., as reported in Table ).