Table 1. Solubility of gypsum and anhydrite adopted in this research and the predicted SI values

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1 Supporting information: Table 1. Solubility of gypsum and anhydrite adopted in this research and the predicted SI values Sample T ID # ( o C) 16, 65, 74 P NaCl CaSO 4 nh 2 O SI System (psi) (mol/kg H 2 O) (mmol/kg H 2 O) gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum

2 gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum gypsum

3 gypsum gypsum gypsum gypsum gypsum anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite

4 anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite anhydrite

5 Table 2. Solubility of anhydrite at three conditions measured by our previous papers and Blount and Dickson 16, 65 T ( o C) P (psi) Measured anhydrite solubility Blount and Dickson s data (mmol/kg H 2 O) (mmol/kg H 2 O)

6 Table 3. Solubility of calcite in NaCl solution and in synthetic brine and the predicted SI values 27 Sampl T P e ID # ( o C) (psi) Conc. (mmol/kg H 2 O) NaCl Ca 2+ HCO 3 CO 2 (aq) (mol/kg H 2 O) SI System calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite

7 calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine calcite in brine

8 calcite in brine calcite in brine calcite in brine

9 Table 4. Compositions of synthetic brine used in calcite system 27 Constituents in total Conc. (mg/l) Conc. (mol/ L) Na HCO B Br SO Si Cl

10 Table 5. Solubility of barite used in this research and the predicted SI values 15 Sample T P NaCl BaSO 4 ID # ( o C) (psi) (mol/kg H 2 O) (mmol/kg H 2 O) SI System barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite

11 barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite

12 barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite

13 barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite barite

14

15 Table 6. Compositions of synthetic brine used in barite system and the predicted SI values 66 Constituents in total Conc. (mol/l) Conc. (mol/ kg H 2 O) Na K Mg Ca NH Cl

16 Table 7. Solubility of barite in synthetic brine and the predicted SI values 66 Conc. (mmol/kg Sample T P H ID # ( o 2 O) C) (psi) Ba SO 4 SI system barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine barite in brine