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

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) 1 0 15 0.00 13.60 0.030 gypsum 2 0 600 0.00 14.25 0.030 gypsum 3 0 7000 0.00 22.77 0.005 gypsum 4 0 16000 0.00 49.45 0.015 gypsum 5 0 20000 0.00 69.66 0.015 gypsum 6 25 15 0.00 16.62-0.002 gypsum 7 25 600 0.00 16.96-0.009 gypsum 8 25 7000 0.00 24.38-0.016 gypsum 9 25 16000 0.00 45.43-0.001 gypsum 10 25 20000 0.00 58.13-0.028 gypsum 11 40 15 0.00 17.45-0.005 gypsum 12 40 600 0.00 16.49-0.048 gypsum 13 40 7000 0.00 26.14 0.025 gypsum 14 40 16000 0.00 45.76 0.037 gypsum 15 40 20000 0.00 58.69 0.012 gypsum 16 0 15 1.00 45.01 0.026 gypsum 17 0 600 1.00 44.98 0.000 gypsum 18 0 7000 1.00 60.34-0.041 gypsum 19 0 16000 1.00 92.89-0.018 gypsum 20 0 20000 1.00 109.07-0.016 gypsum 21 25 15 1.00 45.62-0.003 gypsum 22 25 600 1.00 49.12 0.029 gypsum 23 25 7000 1.00 62.96 0.008 gypsum 24 25 16000 1.00 89.91 0.016 gypsum

25 25 20000 1.00 102.32-0.001 gypsum 26 40 15 1.00 45.21-0.013 gypsum 27 40 600 1.00 46.18-0.016 gypsum 28 40 7000 1.00 61.68 0.011 gypsum 29 40 16000 1.00 87.57 0.024 gypsum 30 40 20000 1.00 98.90-0.001 gypsum 31 0 15 2.00 50.24-0.067 gypsum 32 0 600 2.00 53.38-0.042 gypsum 33 0 7000 2.00 73.81-0.008 gypsum 34 0 16000 2.00 95.85-0.059 gypsum 35 0 20000 2.00 110.15-0.052 gypsum 36 25 15 2.00 54.98 0.012 gypsum 37 25 600 2.00 59.02 0.049 gypsum 38 25 7000 2.00 68.05-0.007 gypsum 39 25 16000 2.00 89.61-0.002 gypsum 40 25 20000 2.00 104.92 0.025 gypsum 41 40 15 2.00 55.46 0.011 gypsum 42 40 600 2.00 58.15 0.032 gypsum 43 40 7000 2.00 67.97 0.004 gypsum 44 40 16000 2.00 89.04 0.016 gypsum 45 40 20000 2.00 105.62 0.048 gypsum 46 0 15 4.00 55.31-0.083 gypsum 47 0 600 4.00 55.68-0.088 gypsum 48 0 7000 4.00 63.34-0.113 gypsum 49 0 16000 4.00 80.77-0.138 gypsum 50 0 20000 4.00 97.76-0.098 gypsum 51 25 15 4.00 58.87 0.082 gypsum 52 25 600 4.00 58.42 0.071 gypsum 53 25 7000 4.00 66.94 0.108 gypsum 54 25 16000 4.00 86.86 0.147 gypsum 55 25 20000 4.00 93.49 0.095 gypsum

56 40 15 4.00 57.80 0.044 gypsum 57 40 600 4.00 58.11 0.045 gypsum 58 40 7000 4.00 70.52 0.147 gypsum 59 40 16000 4.00 83.43 0.118 gypsum 60 40 20000 4.00 88.86 0.060 gypsum 61 146.5 14047.12 6.08 29.25-0.138 anhydrite 62 148.75 14591.02 4.20 32.09-0.045 anhydrite 63 149.5 14351.71 1.21 22.32-0.091 anhydrite 64 151.4333 19517.55 1.91 31.20-0.067 anhydrite 65 198.5 15272.71 3.70 23.65-0.016 anhydrite 66 199.3333 18777.85 1.91 19.89-0.022 anhydrite 67 199.5 14699.8 6.23 28.02-0.081 anhydrite 68 200.5 15026.14 1.55 15.57-0.010 anhydrite 69 200.5 15118 2.87 21.03-0.004 anhydrite 70 231.25 14627.28 6.13 27.61 0.029 anhydrite 71 248.5 17926.94 1.90 13.77 0.053 anhydrite 72 130 1450.4 0.00 3.12-0.043 anhydrite 73 131 14504 0.00 7.65-0.058 anhydrite 74 131 72.52 0.00 2.63-0.058 anhydrite 75 156 14504 0.00 4.78-0.037 anhydrite 76 157 7397.04 0.00 2.64-0.013 anhydrite 77 157 1334.368 0.00 1.62 0.025 anhydrite 78 157 217.56 0.00 1.48 0.035 anhydrite 79 183 6961.92 0.00 1.38 0.088 anhydrite 80 184 1450.4 0.00 0.86 0.178 anhydrite 81 221 14286.44 0.00 1.10 0.109 anhydrite 82 263 14504 0.00 0.50 0.152 anhydrite 83 145.5 1160.32 6.08 22.15-0.071 anhydrite 84 148 1513.251 4.20 22.62-0.019 anhydrite 85 148.5 87.024 1.91 15.54-0.073 anhydrite 86 148.6667 1445.565 1.22 13.00-0.089 anhydrite

87 150.5 5753.253 1.91 19.31-0.069 anhydrite 88 150.5 11936.79 1.91 24.36-0.069 anhydrite 89 152.5 348.096 1.91 15.29-0.060 anhydrite 90 198.75 1617.196 1.90 10.15 0.020 anhydrite 91 199.75 2197.356 1.54 9.06 0.033 anhydrite 92 200 9123.016 1.90 13.98 0.021 anhydrite 93 200 1783.992 3.69 15.56 0.022 anhydrite 94 200 391.608 3.69 14.85 0.016 anhydrite 95 200.25 1827.504 2.86 13.31 0.024 anhydrite 96 200.25 7585.592 6.23 24.05 0.032 anhydrite 97 247 1696.968 1.88 6.89 0.057 anhydrite 98 264.25 14496.75 6.07 27.33 0.085 anhydrite 99 132 7339.024 0.00 4.50-0.059 anhydrite 100 183 14504 0.00 2.40-0.041 anhydrite

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) 150 19400 31.42 31.10 200 19000 21.28 19.97 250 17900 14.61 13.77

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 101 0 500.25 12.85 25.7 30.63 0.10 0.057 calcite 102 0 7003.5 17.61 35.22 25.87 0.10 0.074 calcite 103 0 13992.5 20.84 41.67 22.64 0.10-0.061 calcite 104 0 20996 27.47 54.95 16.01 0.10 0.034 calcite 105 25 500.25 12.22 24.44 31.26 0.10 0.134 calcite 106 25 7003.5 14.81 29.62 28.67 0.10-0.021 calcite 107 25 13992.5 19.29 38.59 24.19 0.10-0.004 calcite 108 25 20996 24.68 49.36 18.8 0.10 0.019 calcite 109 100 500.25 5.82 11.64 32.12 0.10 0.091 calcite 110 100 7003.5 7.4 14.8 30.52 0.10 0.000 calcite 111 100 13992.5 9.55 19.11 28.34 0.10-0.033 calcite 112 100 20996 11.35 22.69 26.53 0.10-0.178 calcite 113 200 500.25 1.32 2.63 32.27 0.10 0.058 calcite 114 200 7003.5 1.98 3.96 31.6 0.10 0.102 calcite 115 200 13992.5 2.81 5.61 30.76 0.10 0.140 calcite 116 200 20996 3.71 7.42 29.85 0.10 0.096 calcite 117 250 1000.5 0.65 1.3 32.27 0.10 0.131 calcite 118 250 7003.5 1.07 2.14 31.84 0.10 0.126 calcite 119 250 13992.5 1.45 2.91 31.45 0.10 0.037 calcite 120 250 20996 2.34 4.68 30.55 0.10 0.179 calcite 121 0 500.25 17.05 34.1 18.43 4.00-0.124 calcite 122 0 7003.5 22.7 45.39 12.78 4.00-0.031 calcite 123 0 13992.5 27.22 54.45 8.25 4.00 0.004 calcite 124 0 20996 31.12 62.25 4.35 4.00 0.057 calcite 125 25 500.25 13.26 26.52 17.9 4.00 0.030 calcite 126 25 7003.5 17.1 34.21 14.06 4.00 0.066 calcite

127 25 13992.5 19.44 38.87 11.72 4.00-0.052 calcite 128 25 20996 23.59 47.18 7.57 4.00 0.018 calcite 129 100 500.25 7.9 15.81 18.59 4.00-0.060 calcite 130 100 7003.5 9.88 19.75 16.62 4.00-0.069 calcite 131 100 13992.5 12.89 25.78 13.61 4.00 0.039 calcite 132 100 20996 16.39 32.78 10.11 4.00 0.142 calcite 133 200 500.25 4.31 8.61 18.17 4.00 0.031 calcite 134 200 7003.5 5.36 10.73 17.11 4.00 0.051 calcite 135 200 13992.5 6.79 13.58 15.68 4.00 0.123 calcite 136 200 20996 7.37 14.75 15.1 4.00-0.058 calcite 137 250 1000.5 3.3 6.6 18.54 4.00 0.068 calcite 138 250 7003.5 3.94 7.87 17.9 4.00 0.010 calcite 139 250 13992.5 5.16 10.31 16.68 4.00 0.153 calcite 140 250 20996 5.82 11.64 16.02 4.00 0.010 calcite 141 0 34.5 4.07 61.72 11.67 4.95 0.033 calcite in brine 142 0 483 6.16 65.9 9.58 4.95-0.007 calcite in brine 143 0 965 8.43 70.44 7.31 4.95-0.056 calcite in brine 144 0 1448 11.33 76.23 4.42 4.95-0.065 calcite in brine 145 25 34.5 1.44 56.47 14.3 4.95-0.058 calcite in brine 146 25 483 2.91 59.39 12.84 4.95 0.031 calcite in brine 147 25 965 4.96 63.5 10.78 4.95 0.092 calcite in brine 148 25 1448 7.39 68.36 8.35 4.95 0.077 calcite in brine 149 100 34.5 0.66 54.9 15.08 4.95 0.035 calcite in brine 150 100 483 0.95 55.48 14.79 4.95-0.029 calcite in brine 151 100 965 1.51 56.6 14.23 4.95-0.033 calcite in brine 152 100 1448 2.67 58.93 13.07 4.95 0.008 calcite in brine 153 200 34.5 0.17 53.93 15.57 4.95-0.002 calcite in brine 154 200 483 0.24 54.06 15.5 4.95-0.039 calcite in brine 155 200 965 0.38 54.35 15.36 4.95-0.013 calcite in brine 156 200 1448 0.58 54.73 15.17 4.95-0.046 calcite in brine 157 250 69 0.1 53.77 15.65 4.95 0.007 calcite in brine

158 250 483 0.16 53.89 15.59 4.95 0.003 calcite in brine 159 250 965 0.25 54.08 15.49 4.95 0.049 calcite in brine 160 250 1448 0.4 54.39 15.34 4.95 0.014 calcite in brine

Table 4. Compositions of synthetic brine used in calcite system 27 Constituents in total Conc. (mg/l) Conc. (mol/ L) Na 102000 4.44 HCO 3 3000 0.0492 B 150 0.0136 Br 3500 0.0438 SO 4 4500 0.0469 Si 30 0.001 Cl 150000 4.23

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 161 0 500 0.10 0.0203 0.124 barite 162 0 500 1.00 0.0533-0.020 barite 163 0 500 2.00 0.0974 0.169 barite 164 0 500 4.00 0.1211 0.165 barite 165 0 500 6.00 0.1053 0.129 barite 166 0 7000 0.10 0.0272 0.046 barite 167 0 7000 1.00 0.0801 0.063 barite 168 0 7000 2.00 0.1241 0.149 barite 169 0 7000 4.00 0.1415 0.089 barite 170 0 7000 6.00 0.1270 0.013 barite 171 0 16000 0.10 0.0389 0.026 barite 172 0 16000 1.00 0.1033 0.000 barite 173 0 16000 2.00 0.1611 0.114 barite 174 0 16000 4.00 0.1688 0.018 barite 175 0 16000 6.00 0.1656 0.016 barite 176 0 22000 0.10 0.0510 0.035 barite 177 0 22000 1.00 0.1344 0.001 barite 178 0 22000 2.00 0.1985 0.067 barite 179 0 22000 4.00 0.1964-0.046 barite 180 0 22000 6.00 0.1866-0.006 barite 181 25 500 0.10 0.0305-0.060 barite 182 25 500 1.00 0.0876-0.104 barite 183 25 500 2.00 0.1277-0.078 barite 184 25 500 4.00 0.1401-0.163 barite 185 25 500 6.00 0.1299-0.185 barite 186 25 7000 0.10 0.0462-0.033 barite 187 25 7000 1.00 0.1221-0.081 barite

188 25 7000 2.00 0.1609-0.090 barite 189 25 7000 4.00 0.1866-0.084 barite 190 25 7000 6.00 0.1897-0.045 barite 191 25 16000 0.10 0.0707-0.005 barite 192 25 16000 1.00 0.1723-0.063 barite 193 25 16000 2.00 0.2194-0.054 barite 194 25 16000 4.00 0.2423-0.020 barite 195 25 16000 6.00 0.2289-0.008 barite 196 25 22000 0.10 0.1009 0.066 barite 197 25 22000 1.00 0.2191-0.068 barite 198 25 22000 2.00 0.3040 0.017 barite 199 25 22000 4.00 0.3020 0.018 barite 200 25 22000 6.00 0.2618 0.021 barite 201 100 500 0.10 0.0651 0.004 barite 202 100 500 1.00 0.2037-0.023 barite 203 100 500 2.00 0.2319-0.193 barite 204 100 500 4.00 0.3394-0.098 barite 205 100 500 6.00 0.4464-0.006 barite 206 100 7000 0.10 0.0904-0.028 barite 207 100 7000 1.00 0.2413-0.125 barite 208 100 7000 2.00 0.3315-0.105 barite 209 100 7000 4.00 0.4014-0.091 barite 210 100 7000 6.00 0.4948-0.009 barite 211 100 16000 0.10 0.1327-0.056 barite 212 100 16000 1.00 0.3546-0.084 barite 213 100 16000 2.00 0.4014-0.142 barite 214 100 16000 4.00 0.4826-0.059 barite 215 100 16000 6.00 0.5453-0.023 barite 216 100 22000 0.10 0.1774-0.058 barite 217 100 22000 1.00 0.4033-0.159 barite 218 100 22000 2.00 0.5298-0.084 barite

219 100 22000 4.00 0.6378 0.030 barite 220 100 22000 6.00 0.6167-0.038 barite 221 150 500 0.10 0.0646 0.064 barite 222 150 500 1.00 0.2433 0.060 barite 223 150 500 2.00 0.3608 0.041 barite 224 150 500 4.00 0.5537 0.062 barite 225 150 500 6.00 0.7267 0.019 barite 226 150 7000 0.10 0.0782-0.072 barite 227 150 7000 1.00 0.3250 0.062 barite 228 150 7000 2.00 0.4737 0.054 barite 229 150 7000 4.00 0.6833 0.070 barite 230 150 7000 6.00 0.8540 0.037 barite 231 150 16000 0.10 0.1206-0.055 barite 232 150 16000 1.00 0.4317 0.025 barite 233 150 16000 2.00 0.6272 0.052 barite 234 150 16000 4.00 0.8894 0.096 barite 235 150 16000 6.00 0.9588-0.004 barite 236 150 22000 0.10 0.1646-0.039 barite 237 150 22000 1.00 0.5184-0.016 barite 238 150 22000 2.00 0.7310 0.023 barite 239 150 22000 4.00 1.0573 0.092 barite 240 150 22000 6.00 1.1664-0.024 barite 241 200 500 0.10 0.0606 0.220 barite 242 200 500 1.00 0.3076 0.241 barite 243 200 500 2.00 0.4389 0.088 barite 244 200 500 4.00 0.7927 0.097 barite 245 200 500 6.00 1.4172 0.155 barite 246 200 7000 0.10 0.0750 0.076 barite 247 200 7000 1.00 0.3720 0.160 barite 248 200 7000 2.00 0.5303 0.033 barite 249 200 7000 4.00 0.9917 0.089 barite

250 200 7000 6.00 1.6475 0.113 barite 251 200 16000 0.10 0.1014-0.022 barite 252 200 16000 1.00 0.4799 0.108 barite 253 200 16000 2.00 0.6927 0.030 barite 254 200 16000 4.00 1.2097 0.062 barite 255 200 16000 6.00 2.0717 0.063 barite 256 200 22000 0.10 0.1582 0.095 barite 257 200 22000 1.00 0.6325 0.123 barite 258 200 22000 2.00 0.9572 0.094 barite 259 200 22000 4.00 1.4234 0.057 barite 260 200 22000 6.00 2.2997-0.010 barite 261 250 500 0.10 0.0358-0.025 barite 262 250 500 1.00 0.2635-0.057 barite 263 250 500 2.00 0.5236-0.085 barite 264 250 500 4.00 1.1079-0.112 barite 265 250 500 6.00 2.0784-0.075 barite 266 250 7000 0.10 0.0679 0.056 barite 267 250 7000 1.00 0.3853-0.015 barite 268 250 7000 2.00 0.7422-0.032 barite 269 250 7000 4.00 1.4391-0.089 barite 270 250 7000 6.00 2.3675-0.099 barite 271 250 16000 0.10 0.0940-0.070 barite 272 250 16000 1.00 0.5558 0.022 barite 273 250 16000 2.00 0.9130-0.087 barite 274 250 16000 4.00 1.9715-0.036 barite 275 250 16000 6.00 2.9054-0.034 barite 276 250 22000 0.10 0.1482 0.014 barite 277 250 22000 1.00 0.6836-0.036 barite 278 250 22000 2.00 1.1373-0.103 barite 279 250 22000 4.00 2.3779-0.047 barite 280 250 22000 6.00 3.3426 0.008 barite

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 3.26 3.60496 K 0.0256 0.028288 Mg 0.1458 0.161109 Ca 0.5 0.551417 NH 4 0.0139 0.01536 Cl 4.598 5.081004

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 2+ 2- SO 4 SI system 281 25 500 0.138 0.149-0.002 barite in brine 282 25 7000 0.164 0.196-0.006 barite in brine 283 25 14000 0.196 0.243 0.018 barite in brine 284 25 20000 0.228 0.286 0.007 barite in brine 285 100 500 0.461 0.534-0.025 barite in brine 286 100 7000 0.535 0.622-0.028 barite in brine 287 100 14000 0.6 0.677-0.033 barite in brine 288 100 20000 0.678 0.823-0.021 barite in brine 289 200 500 1.093 1.168 0.062 barite in brine 290 200 7000 1.264 1.19 0.014 barite in brine 291 200 14000 1.355 1.291-0.005 barite in brine 292 200 20000 1.476 1.392-0.022 barite in brine 293 250 1000 1.584 1.63-0.045 barite in brine 294 250 7000 2.018 1.829-0.004 barite in brine 295 250 14000 2.137 2.091 0.019 barite in brine 296 250 20000 2.311 2.326 0.014 barite in brine