Table 7
Comparison of the residual oil saturation estimates uncertainty ranges resulting from a 25 or 50 ppm error in the alcohol and ester outlet concentration profiles maximum peak amplitudes measurement, when using first- and minmod second-order schemes and performing a grid refinement (see the text). Negative values are reported as zero values.
ΔC (ppm) | Scheme | n | S orw (−) |
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25 | O(1) | 1 | 0.138 | 0.073 | 0.149 | 0 | 0.627 |
2 | 0.160 | 0.161 | 0.160 | 0 | 0.440 | ||
4 | 0.177 | 0.176 | 0.177 | 0.041 | 0.336 | ||
8 | 0.172 | 0.167 | 0.175 | 0.085 | 0.267 | ||
16 | 0.165 | 0.159 | 0.170 | 0.104 | 0.229 | ||
O(2m) | 1 | 0.127 | 0.064 | 0.148 | 0 | 0.451 | |
2 | 0.164 | 0.145 | 0.174 | 0.010 | 0.343 | ||
4 | 0.184 | 0.174 | 0.191 | 0.088 | 0.289 | ||
8 | 0.174 | 0.167 | 0.181 | 0.112 | 0.240 | ||
16 | 0.165 | 0.155 | 0.174 | 0.114 | 0.217 | ||
50 | O(1) | 1 | 0.138 | 0.808 | 0.155 | 0 | 1 |
2 | 0.160 | 0.162 | 0.160 | 0 | 0.621 | ||
4 | 0.177 | 0.181 | 0.175 | 0 | 0.429 | ||
8 | 0.172 | 0.169 | 0.173 | 0.046 | 0.318 | ||
16 | 0.165 | 0.161 | 0.168 | 0.077 | 0.263 | ||
O(2m) | 1 | 0.127 | 0 | 0.152 | 0 | 0.601 | |
2 | 0.164 | 0.138 | 0.174 | 0 | 0.420 | ||
4 | 0.184 | 0.172 | 0.192 | 0.056 | 0.327 | ||
8 | 0.174 | 0.165 | 0.181 | 0.088 | 0.268 | ||
16 | 0.165 | 0.155 | 0.173 | 0.097 | 0.236 |