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Add gaslift optimization support for MSW.

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Implements gas lift optimization support for multisegmented wells (MSW).
This commit is contained in:
Håkon Hægland
2022-02-07 11:28:35 +01:00
parent a520733d5b
commit 54160827de
15 changed files with 238 additions and 147 deletions
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33
opm/simulators/wells/GasLiftSingleWellGeneric.cpp
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@@ -285,7 +285,13 @@ checkThpControl_() const
const int well_index = this->well_state_.index(this->well_name_).value();
const Well::ProducerCMode& control_mode =
this->well_state_.well(well_index).production_cmode;
return control_mode == Well::ProducerCMode::THP;
bool thp_control = control_mode == Well::ProducerCMode::THP;
if (this->debug) {
if (!thp_control) {
displayDebugMessage_("Well is not under THP control, skipping iteration..");
}
}
return thp_control;
}
@@ -431,6 +437,18 @@ debugShowLimitingTargets_(const LimitedRates& rates) const
}
}
void
GasLiftSingleWellGeneric::
debugShowProducerControlMode() const
{
const int well_index = this->well_state_.index(this->well_name_).value();
const Well::ProducerCMode& control_mode =
this->well_state_.well(well_index).production_cmode;
const std::string msg = fmt::format("Current control mode is: {}",
Well::ProducerCMode2String(control_mode));
displayDebugMessage_(msg);
}
void
GasLiftSingleWellGeneric::
debugShowStartIteration_(double alq, bool increase, double oil_rate)
@@ -1139,6 +1157,7 @@ std::unique_ptr<GasLiftWellState>
GasLiftSingleWellGeneric::
runOptimizeLoop_(bool increase)
{
if (this->debug) debugShowProducerControlMode();
std::unique_ptr<GasLiftWellState> ret_value; // nullptr initially
auto rates = getInitialRatesWithLimit_();
if (!rates) return ret_value;
@@ -1160,7 +1179,11 @@ runOptimizeLoop_(bool increase)
}
OptimizeState state {*this, increase};
if (!checkThpControl_()) {
auto temp_alq = cur_alq;
if (checkThpControl_()) {
if (this->debug) debugShowStartIteration_(temp_alq, increase, new_rates.oil);
}
else {
// If the well is not under THP control, we can still use the previous
// initial adjustment of ALQ by using the well's THP limit to calculate
// BHP and then well rates from that.
@@ -1169,8 +1192,6 @@ runOptimizeLoop_(bool increase)
// Then gaslift can be reduced while still keeping the group target.
state.stop_iteration = true;
}
auto temp_alq = cur_alq;
if (this->debug) debugShowStartIteration_(temp_alq, increase, new_rates.oil);
while (!state.stop_iteration && (++state.it <= this->max_iterations_)) {
if (state.checkRatesViolated(new_rates)) break;
if (state.checkAlqOutsideLimits(temp_alq, new_rates.oil)) break;
@@ -1524,11 +1545,11 @@ checkAlqOutsideLimits(double alq, [[maybe_unused]] double oil_rate)
else { // we are decreasing lift gas
if ( alq == 0 ) {
ss << "ALQ is zero, cannot decrease further. Stopping iteration.";
return true;
result = true;
}
else if ( alq < 0 ) {
ss << "Negative ALQ: " << alq << ". Stopping iteration.";
return true;
result = true;
}
// NOTE: A negative min_alq_ means: allocate at least enough lift gas
// to enable the well to flow, see WLIFTOPT item 5.