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Merge pull request #1088 from GitPaean/correcting_bhp_limits_for_well_potentials

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more careful determination of the most restrictive bhp value
This commit is contained in:
Atgeirr Flø Rasmussen 2017-03-19 14:08:13 +01:00 committed by GitHub
commit 553f345670
1 changed files with 46 additions and 12 deletions
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58
opm/autodiff/StandardWellsDense_impl.hpp
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@ -1650,22 +1650,55 @@ namespace Opm {
for (int w = 0; w < nw; ++w) {
// bhp needs to be determined for the well potential calculation
double bhp = 0.;
// There can be more than one BHP/THP constraints.
// TODO: there is an option to ignore the THP limit when calculating well potentials,
// we are not handling it for the moment, while easy to incorporate
// the bhp will be used to compute well potentials
double bhp;
// type of the well, INJECTOR or PRODUCER
const WellType& well_type = wells().type[w];
// initial bhp value, making the value not usable
switch(well_type) {
case INJECTOR:
bhp = std::numeric_limits<double>::max();
break;
case PRODUCER:
bhp = -std::numeric_limits<double>::max();
break;
default:
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type for well " << wells().name[w]);
}
// the well controls
const WellControls* well_control = wells().ctrls[w];
// The number of the well controls
// The number of the well controls/constraints
const int nwc = well_controls_get_num(well_control);
// Finding a BHP control or a THP control
// IF we find a THP control, we calculate the BHP value.
// TODO: there is option to ignore the THP limit when calculating well potentials,
// we are not handling it for the moment.
for (int ctrl_index = 0; ctrl_index < nwc; ++ctrl_index) {
// finding a BHP constraint
if (well_controls_iget_type(well_control, ctrl_index) == BHP) {
// set bhp to the bhp value
bhp = well_controls_iget_target(well_control, ctrl_index);
// get the bhp constraint value, it should always be postive assummingly
const double bhp_target = well_controls_iget_target(well_control, ctrl_index);
switch(well_type) {
case INJECTOR: // using the lower bhp contraint from Injectors
if (bhp_target < bhp) {
bhp = bhp_target;
}
break;
case PRODUCER:
if (bhp_target > bhp) {
bhp = bhp_target;
}
break;
default:
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type for well " << wells().name[w]);
} // end of switch
}
// finding a THP constraint
if (well_controls_iget_type(well_control, ctrl_index) == THP) {
double aqua = 0.0;
double liquid = 0.0;
@ -1707,16 +1740,17 @@ namespace Opm {
wellPerforationDensities()[first_perf], gravity_);
const double bhp_calculated = vfp_properties_->getProd()->bhp(vfp, aqua, liquid, vapour, thp, alq) - dp;
// apply the strictest of the bhp controlls i.e. largest bhp for producers
if (bhp_calculated > bhp) {
bhp = bhp_calculated;
}
if (bhp_calculated > bhp) {
bhp = bhp_calculated;
}
} else {
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type of well");
}
}
}
assert(bhp != 0.0);
// there should be always some avaible bhp/thp constraints there
assert(std::abs(bhp) != std::numeric_limits<double>::max());
// Should we consider crossflow when calculating well potentionals?
const bool allow_cf = allow_cross_flow(w, ebosSimulator);