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Find thp iteratively

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This commit is contained in:
Håkon Hægland 2023-06-01 09:00:09 +02:00
parent 79af105de5
commit 8843e8af66
2 changed files with 61 additions and 8 deletions
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63
opm/simulators/wells/WellBhpThpCalculator.cpp
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@ -43,7 +43,10 @@
#include <cmath>
#include <optional>
#include <fmt/format.h>
static constexpr bool extraBhpAtThpLimitOutput = false;
static constexpr bool extraThpFromBhpOutput = false;
namespace Opm
{
@ -118,27 +121,71 @@ double WellBhpThpCalculator::calculateThpFromBhp(const std::vector<double>& rate
// pick the density in the top layer
double thp = 0.0;
auto pressure_loss = getVfpBhpAdjustment(bhp, thp_limit);
const int table_id = well_.wellEcl().vfp_table_number();
if (well_.isInjector()) {
assert(!alq.has_value());
const int table_id = well_.wellEcl().vfp_table_number();
const double vfp_ref_depth = well_.vfpProperties()->getInj()->getTable(table_id).getDatumDepth();
const double dp = wellhelpers::computeHydrostaticCorrection(well_.refDepth(), vfp_ref_depth, rho, well_.gravity());
thp = well_.vfpProperties()->getInj()->thp(table_id, aqua, liquid, vapour, bhp + dp - pressure_loss);
auto thp_func =
[this, table_id, vfp_ref_depth, aqua, liquid, vapour, dp](
const double bhp_value, const double pressure_loss) {
return this->well_.vfpProperties()->getInj()->thp(
table_id, aqua, liquid, vapour, bhp_value + dp - pressure_loss);
};
thp = findThpFromBhpIteratively(thp_func, bhp, thp_limit, dp, deferred_logger);
}
else if (well_.isProducer()) {
const int table_id = well_.wellEcl().vfp_table_number();
const double vfp_ref_depth = well_.vfpProperties()->getProd()->getTable(table_id).getDatumDepth();
const double dp = wellhelpers::computeHydrostaticCorrection(well_.refDepth(), vfp_ref_depth, rho, well_.gravity());
thp = well_.vfpProperties()->getProd()->thp(
table_id, aqua, liquid, vapour, bhp + dp - pressure_loss, alq.value());
auto thp_func =
[this, table_id, vfp_ref_depth, aqua, liquid, vapour, dp, &alq]
(const double bhp_value, const double pressure_loss) {
return this->well_.vfpProperties()->getProd()->thp(
table_id, aqua, liquid, vapour, bhp_value + dp - pressure_loss, alq.value());
};
thp = findThpFromBhpIteratively(thp_func, bhp, thp_limit, dp, deferred_logger);
}
else {
OPM_DEFLOG_THROW(std::logic_error, "Expected INJECTOR or PRODUCER well", deferred_logger);
}
return thp;
}
double
WellBhpThpCalculator::
findThpFromBhpIteratively(
const std::function<double(const double, const double)>& thp_func,
const double bhp,
const double thp_limit,
const double dp,
DeferredLogger& deferred_logger) const
{
auto pressure_loss = getVfpBhpAdjustment(bhp + dp, thp_limit);
auto thp = thp_func(bhp, pressure_loss);
const double tolerance = 1e-5 * unit::barsa;
bool do_iterate = true;
int it = 1;
int max_iterations = 50;
bool debug = true;
while(do_iterate) {
if (it > max_iterations) {
break;
}
double thp_prev = thp;
pressure_loss = getVfpBhpAdjustment(bhp + dp - pressure_loss, thp_prev);
thp = thp_func(bhp, pressure_loss);
auto error = std::fabs(thp-thp_prev);
if (extraThpFromBhpOutput) {
const std::string msg = fmt::format(
"findThpFromBhpIteratively(): iteration {}, thp = {}, bhp = {}, "
"pressure_loss = {}, error = {}", it, thp, bhp+dp-pressure_loss, pressure_loss, error);
deferred_logger.debug(msg);
}
if (std::fabs(thp-thp_prev) < tolerance) {
break;
}
it++;
}
return thp;
}

6
opm/simulators/wells/WellBhpThpCalculator.hpp
View File

@ -140,6 +140,12 @@ private:
double& low, double& high,
DeferredLogger& deferred_logger);
double findThpFromBhpIteratively(const std::function<double(const double, const double)>& thp_func,
const double bhp,
const double thp_limit,
const double dp,
DeferredLogger& deferred_logger) const;
const WellInterfaceGeneric& well_; //!< Reference to well interface
};