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Adjustments for vanishing oil phase.

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This commit is contained in:
osae 2014-06-25 17:59:02 +02:00
parent a9138ef574
commit 7c667a2bd7
1 changed files with 13 additions and 3 deletions
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16
opm/core/simulator/initStateEquil_impl.hpp
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@ -628,18 +628,28 @@ namespace Opm
sg = satFromPc(props, gaspos, cell, pcog, increasing); sg = satFromPc(props, gaspos, cell, pcog, increasing);
phase_saturations[gaspos][local_index] = sg; phase_saturations[gaspos][local_index] = sg;
} }
bool overlap = false;
if (gas && water && (sg + sw > 1.0)) { if (gas && water && (sg + sw > 1.0)) {
// Overlapping gas-oil and oil-water transition // Overlapping gas-oil and oil-water transition
// zones can lead to unphysical saturations when // zones can lead to unphysical saturations when
// treated as above. Must recalculate using gas-water // treated as above. Must recalculate using gas-water
// capillary pressure. // capillary pressure.
const double pcgw = phase_pressures[gaspos][local_index] - phase_pressures[waterpos][local_index]; const double pcgw = phase_pressures[gaspos][local_index] - phase_pressures[waterpos][local_index];
if (! swat_init.empty()) {
// Re-scale Pc to reflect imposed sw for vanishing oil phase.
// This seems consistent with ecl, and fails to honour
// swat_init in case of non-trivial gas-oil cap pressure.
props.swatInitScaling(cell, pcgw, sw);
}
sw = satFromSumOfPcs(props, waterpos, gaspos, cell, pcgw); sw = satFromSumOfPcs(props, waterpos, gaspos, cell, pcgw);
sg = 1.0 - sw; sg = 1.0 - sw;
phase_saturations[waterpos][local_index] = sw; phase_saturations[waterpos][local_index] = sw;
phase_saturations[gaspos][local_index] = sg; phase_saturations[gaspos][local_index] = sg;
overlap = true; // Adjust oil pressure according to gas saturation and cap pressure
double pc[BlackoilPhases::MaxNumPhases];
double sat[BlackoilPhases::MaxNumPhases];
sat[gaspos] = sg;
props.capPress(1, sat, &cell, pc, 0);
phase_pressures[oilpos][local_index] = phase_pressures[gaspos][local_index] - pc[gaspos];
} }
phase_saturations[oilpos][local_index] = 1.0 - sw - sg; phase_saturations[oilpos][local_index] = 1.0 - sw - sg;
@ -650,7 +660,7 @@ namespace Opm
sat[waterpos] = smax[waterpos]; sat[waterpos] = smax[waterpos];
props.capPress(1, sat, &cell, pc, 0); props.capPress(1, sat, &cell, pc, 0);
phase_pressures[oilpos][local_index] = phase_pressures[waterpos][local_index] + pc[waterpos]; phase_pressures[oilpos][local_index] = phase_pressures[waterpos][local_index] + pc[waterpos];
} else if (overlap || sg > smax[gaspos]-1.0e-6) { } else if (sg > smax[gaspos]-1.0e-6) {
sat[gaspos] = smax[gaspos]; sat[gaspos] = smax[gaspos];
props.capPress(1, sat, &cell, pc, 0); props.capPress(1, sat, &cell, pc, 0);
phase_pressures[oilpos][local_index] = phase_pressures[gaspos][local_index] - pc[gaspos]; phase_pressures[oilpos][local_index] = phase_pressures[gaspos][local_index] - pc[gaspos];