OilfieldToolsNet/opm-simulators
4
0
Fork 0
mirror of https://github.com/OPM/opm-simulators.git synced 2024-12-01 21:39:09 -06:00
Code Issues Packages Projects Releases Wiki Activity
1d34c9dc6e
opm-simulators/opm/autodiff/StandardWells_impl.hpp
Tor Harald Sandve 6084721812 Prepare for extended models. 
Let the code loop over number of components instead of phase
Pass TypeTag as template parameter instead of all the properties.
2017-05-08 09:52:30 +02:00

1656 lines
62 KiB
C++
Raw Blame History

/*
Copyright 2016 SINTEF ICT, Applied Mathematics.
Copyright 2016 Statoil ASA.
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
*/
#include <opm/autodiff/StandardWells.hpp>
#include <opm/autodiff/WellDensitySegmented.hpp>
#include <opm/autodiff/VFPInjProperties.hpp>
#include <opm/autodiff/VFPProdProperties.hpp>
#include <opm/autodiff/WellHelpers.hpp>
namespace Opm
{
StandardWells::
WellOps::WellOps(const Wells* wells)
: w2p(),
p2w(),
well_cells()
{
if( wells )
{
w2p = Eigen::SparseMatrix<double>(wells->well_connpos[ wells->number_of_wells ], wells->number_of_wells);
p2w = Eigen::SparseMatrix<double>(wells->number_of_wells, wells->well_connpos[ wells->number_of_wells ]);
const int nw = wells->number_of_wells;
const int* const wpos = wells->well_connpos;
typedef Eigen::Triplet<double> Tri;
std::vector<Tri> scatter, gather;
scatter.reserve(wpos[nw]);
gather .reserve(wpos[nw]);
for (int w = 0, i = 0; w < nw; ++w) {
for (; i < wpos[ w + 1 ]; ++i) {
scatter.push_back(Tri(i, w, 1.0));
gather .push_back(Tri(w, i, 1.0));
}
}
w2p.setFromTriplets(scatter.begin(), scatter.end());
p2w.setFromTriplets(gather .begin(), gather .end());
well_cells.assign(wells->well_cells, wells->well_cells + wells->well_connpos[wells->number_of_wells]);
}
}
StandardWells::StandardWells(const Wells* wells_arg, WellCollection* well_collection)
: wells_active_(wells_arg!=nullptr)
, wells_(wells_arg)
, wops_(wells_arg)
, well_collection_(well_collection)
, well_perforation_efficiency_factors_(Vector::Ones(wells_!=nullptr ? wells_->well_connpos[wells_->number_of_wells] : 0))
, fluid_(nullptr)
, active_(nullptr)
, phase_condition_(nullptr)
, vfp_properties_(nullptr)
, well_perforation_densities_(Vector())
, well_perforation_pressure_diffs_(Vector())
, store_well_perforation_fluxes_(false)
{
}
void
StandardWells::init(const BlackoilPropsAdFromDeck* fluid_arg,
const std::vector<bool>* active_arg,
const std::vector<PhasePresence>* pc_arg,
const VFPProperties* vfp_properties_arg,
const double gravity_arg,
const Vector& depth_arg)
{
fluid_ = fluid_arg;
active_ = active_arg;
phase_condition_ = pc_arg;
vfp_properties_ = vfp_properties_arg;
gravity_ = gravity_arg;
perf_cell_depth_ = subset(depth_arg, wellOps().well_cells);;
calculateEfficiencyFactors();
}
const Wells& StandardWells::wells() const
{
assert(wells_ != 0);
return *(wells_);
}
const Wells* StandardWells::wellsPointer() const
{
return wells_;
}
bool StandardWells::wellsActive() const
{
return wells_active_;
}
void StandardWells::setWellsActive(const bool wells_active)
{
wells_active_ = wells_active;
}
bool StandardWells::localWellsActive() const
{
return wells_ ? (wells_->number_of_wells > 0 ) : false;
}
int
StandardWells::numWellVars() const
{
if ( !localWellsActive() )
{
return 0;
}
// For each well, we have a bhp variable, and one flux per phase.
const int nw = wells().number_of_wells;
return (numPhases() + 1) * nw;
}
const StandardWells::WellOps&
StandardWells::wellOps() const
{
return wops_;
}
StandardWells::Vector& StandardWells::wellPerforationDensities()
{
return well_perforation_densities_;
}
const StandardWells::Vector&
StandardWells::wellPerforationDensities() const
{
return well_perforation_densities_;
}
StandardWells::Vector&
StandardWells::wellPerforationPressureDiffs()
{
return well_perforation_pressure_diffs_;
}
const StandardWells::Vector&
StandardWells::wellPerforationPressureDiffs() const
{
return well_perforation_pressure_diffs_;
}
template<class SolutionState, class WellState>
void
StandardWells::
computePropertiesForWellConnectionPressures(const SolutionState& state,
const WellState& xw,
std::vector<double>& b_perf,
std::vector<double>& rsmax_perf,
std::vector<double>& rvmax_perf,
std::vector<double>& surf_dens_perf)
{
const int nperf = wells().well_connpos[wells().number_of_wells];
const int nw = wells().number_of_wells;
// Compute the average pressure in each well block
const Vector perf_press = Eigen::Map<const Vector>(xw.perfPress().data(), nperf);
Vector avg_press = perf_press*0;
for (int w = 0; w < nw; ++w) {
for (int perf = wells().well_connpos[w]; perf < wells().well_connpos[w+1]; ++perf) {
const double p_above = perf == wells().well_connpos[w] ? state.bhp.value()[w] : perf_press[perf - 1];
const double p_avg = (perf_press[perf] + p_above)/2;
avg_press[perf] = p_avg;
}
}
const std::vector<int>& well_cells = wellOps().well_cells;
// Use cell values for the temperature as the wells don't knows its temperature yet.
const ADB perf_temp = subset(state.temperature, well_cells);
// Compute b, rsmax, rvmax values for perforations.
// Evaluate the properties using average well block pressures
// and cell values for rs, rv, phase condition and temperature.
const ADB avg_press_ad = ADB::constant(avg_press);
std::vector<PhasePresence> perf_cond(nperf);
// const std::vector<PhasePresence>& pc = phaseCondition();
for (int perf = 0; perf < nperf; ++perf) {
perf_cond[perf] = (*phase_condition_)[well_cells[perf]];
}
const PhaseUsage& pu = fluid_->phaseUsage();
DataBlock b(nperf, pu.num_phases);
if (pu.phase_used[BlackoilPhases::Aqua]) {
const Vector bw = fluid_->bWat(avg_press_ad, perf_temp, well_cells).value();
b.col(pu.phase_pos[BlackoilPhases::Aqua]) = bw;
}
assert((*active_)[Oil]);
const Vector perf_so = subset(state.saturation[pu.phase_pos[Oil]].value(), well_cells);
if (pu.phase_used[BlackoilPhases::Liquid]) {
const ADB perf_rs = (state.rs.size() > 0) ? subset(state.rs, well_cells) : ADB::null();
const Vector bo = fluid_->bOil(avg_press_ad, perf_temp, perf_rs, perf_cond, well_cells).value();
b.col(pu.phase_pos[BlackoilPhases::Liquid]) = bo;
}
if (pu.phase_used[BlackoilPhases::Vapour]) {
const ADB perf_rv = (state.rv.size() > 0) ? subset(state.rv, well_cells) : ADB::null();
const Vector bg = fluid_->bGas(avg_press_ad, perf_temp, perf_rv, perf_cond, well_cells).value();
b.col(pu.phase_pos[BlackoilPhases::Vapour]) = bg;
}
if (pu.phase_used[BlackoilPhases::Liquid] && pu.phase_used[BlackoilPhases::Vapour]) {
const Vector rssat = fluid_->rsSat(ADB::constant(avg_press), ADB::constant(perf_so), well_cells).value();
rsmax_perf.assign(rssat.data(), rssat.data() + nperf);
const Vector rvsat = fluid_->rvSat(ADB::constant(avg_press), ADB::constant(perf_so), well_cells).value();
rvmax_perf.assign(rvsat.data(), rvsat.data() + nperf);
}
// b is row major, so can just copy data.
b_perf.assign(b.data(), b.data() + nperf * pu.num_phases);
// Surface density.
// The compute density segment wants the surface densities as
// an np * number of wells cells array
Vector rho = superset(fluid_->surfaceDensity(0 , well_cells), Span(nperf, pu.num_phases, 0), nperf*pu.num_phases);
for (int phase = 1; phase < pu.num_phases; ++phase) {
rho += superset(fluid_->surfaceDensity(phase , well_cells), Span(nperf, pu.num_phases, phase), nperf*pu.num_phases);
}
surf_dens_perf.assign(rho.data(), rho.data() + nperf * pu.num_phases);
}
template <class WellState>
void
StandardWells::
computeWellConnectionDensitesPressures(const WellState& xw,
const std::vector<double>& b_perf,
const std::vector<double>& rsmax_perf,
const std::vector<double>& rvmax_perf,
const std::vector<double>& surf_dens_perf,
const std::vector<double>& depth_perf,
const double grav)
{
// Compute densities
std::vector<double> cd =
WellDensitySegmented::computeConnectionDensities(
wells(), fluid_->phaseUsage(), xw.perfPhaseRates(),
b_perf, rsmax_perf, rvmax_perf, surf_dens_perf);
const int nperf = wells().well_connpos[wells().number_of_wells];
// Compute pressure deltas
std::vector<double> cdp =
WellDensitySegmented::computeConnectionPressureDelta(
wells(), depth_perf, cd, grav);
// Store the results
well_perforation_densities_ = Eigen::Map<const Vector>(cd.data(), nperf);
well_perforation_pressure_diffs_ = Eigen::Map<const Vector>(cdp.data(), nperf);
}
template <class SolutionState, class WellState>
void
StandardWells::
computeWellConnectionPressures(const SolutionState& state,
const WellState& xw)
{
if( ! localWellsActive() ) return ;
// 1. Compute properties required by computeConnectionPressureDelta().
// Note that some of the complexity of this part is due to the function
// taking std::vector<double> arguments, and not Eigen objects.
std::vector<double> b_perf;
std::vector<double> rsmax_perf;
std::vector<double> rvmax_perf;
std::vector<double> surf_dens_perf;
computePropertiesForWellConnectionPressures(state, xw, b_perf, rsmax_perf, rvmax_perf, surf_dens_perf);
const Vector& pdepth = perf_cell_depth_;
const int nperf = wells().well_connpos[wells().number_of_wells];
const std::vector<double> depth_perf(pdepth.data(), pdepth.data() + nperf);
computeWellConnectionDensitesPressures(xw, b_perf, rsmax_perf, rvmax_perf, surf_dens_perf, depth_perf, gravity_);
}
template <class ReservoirResidualQuant, class SolutionState>
void
StandardWells::
extractWellPerfProperties(const SolutionState& /* state */,
const std::vector<ReservoirResidualQuant>& rq,
std::vector<ADB>& mob_perfcells,
std::vector<ADB>& b_perfcells) const
{
// If we have wells, extract the mobilities and b-factors for
// the well-perforated cells.
if ( !localWellsActive() ) {
mob_perfcells.clear();
b_perfcells.clear();
return;
} else {
const std::vector<int>& well_cells = wellOps().well_cells;
const int num_phases = wells().number_of_phases;
mob_perfcells.resize(num_phases, ADB::null());
b_perfcells.resize(num_phases, ADB::null());
for (int phase = 0; phase < num_phases; ++phase) {
mob_perfcells[phase] = subset(rq[phase].mob, well_cells);
b_perfcells[phase] = subset(rq[phase].b, well_cells);
}
}
}
template <class SolutionState>
void
StandardWells::
computeWellFlux(const SolutionState& state,
const std::vector<ADB>& mob_perfcells,
const std::vector<ADB>& b_perfcells,
Vector& aliveWells,
std::vector<ADB>& cq_s) const
{
if( ! localWellsActive() ) return ;
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
const int nperf = wells().well_connpos[nw];
Vector Tw = Eigen::Map<const Vector>(wells().WI, nperf);
const std::vector<int>& well_cells = wellOps().well_cells;
// pressure diffs computed already (once per step, not changing per iteration)
const Vector& cdp = wellPerforationPressureDiffs();
// Extract needed quantities for the perforation cells
const ADB& p_perfcells = subset(state.pressure, well_cells);
// Perforation pressure
const ADB perfpressure = (wellOps().w2p * state.bhp) + cdp;
// Pressure drawdown (also used to determine direction of flow)
const ADB drawdown = p_perfcells - perfpressure;
// Compute vectors with zero and ones that
// selects the wanted quantities.
// selects injection perforations
Vector selectInjectingPerforations = Vector::Zero(nperf);
// selects producing perforations
Vector selectProducingPerforations = Vector::Zero(nperf);
for (int c = 0; c < nperf; ++c){
if (drawdown.value()[c] < 0)
selectInjectingPerforations[c] = 1;
else
selectProducingPerforations[c] = 1;
}
// Handle cross flow
const Vector numInjectingPerforations = (wellOps().p2w * ADB::constant(selectInjectingPerforations)).value();
const Vector numProducingPerforations = (wellOps().p2w * ADB::constant(selectProducingPerforations)).value();
for (int w = 0; w < nw; ++w) {
if (!wells().allow_cf[w]) {
for (int perf = wells().well_connpos[w] ; perf < wells().well_connpos[w+1]; ++perf) {
// Crossflow is not allowed; reverse flow is prevented.
// At least one of the perforation must be open in order to have a meeningful
// equation to solve. For the special case where all perforations have reverse flow,
// and the target rate is non-zero all of the perforations are keept open.
if (wells().type[w] == INJECTOR && numInjectingPerforations[w] > 0) {
selectProducingPerforations[perf] = 0.0;
} else if (wells().type[w] == PRODUCER && numProducingPerforations[w] > 0 ){
selectInjectingPerforations[perf] = 0.0;
}
}
}
}
// HANDLE FLOW INTO WELLBORE
// compute phase volumetric rates at standard conditions
std::vector<ADB> cq_p(np, ADB::null());
std::vector<ADB> cq_ps(np, ADB::null());
for (int phase = 0; phase < np; ++phase) {
cq_p[phase] = -(selectProducingPerforations * Tw) * (mob_perfcells[phase] * drawdown);
cq_ps[phase] = b_perfcells[phase] * cq_p[phase];
}
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
if ((*active_)[Oil] && (*active_)[Gas]) {
const int oilpos = pu.phase_pos[Oil];
const int gaspos = pu.phase_pos[Gas];
const ADB cq_psOil = cq_ps[oilpos];
const ADB cq_psGas = cq_ps[gaspos];
const ADB& rv_perfcells = subset(state.rv, well_cells);
const ADB& rs_perfcells = subset(state.rs, well_cells);
cq_ps[gaspos] += rs_perfcells * cq_psOil;
cq_ps[oilpos] += rv_perfcells * cq_psGas;
}
// HANDLE FLOW OUT FROM WELLBORE
// Using total mobilities
ADB total_mob = mob_perfcells[0];
for (int phase = 1; phase < np; ++phase) {
total_mob += mob_perfcells[phase];
}
// injection perforations total volume rates
const ADB cqt_i = -(selectInjectingPerforations * Tw) * (total_mob * drawdown);
// Store well perforation total fluxes (reservor volumes) if requested.
if (store_well_perforation_fluxes_) {
// Ugly const-cast, but unappealing alternatives.
Vector& wf = const_cast<Vector&>(well_perforation_fluxes_);
wf = cqt_i.value();
for (int phase = 0; phase < np; ++phase) {
wf += cq_p[phase].value();
}
}
// compute wellbore mixture for injecting perforations
// The wellbore mixture depends on the inflow from the reservoar
// and the well injection rates.
// compute avg. and total wellbore phase volumetric rates at standard conds
const DataBlock compi = Eigen::Map<const DataBlock>(wells().comp_frac, nw, np);
std::vector<ADB> wbq(np, ADB::null());
ADB wbqt = ADB::constant(Vector::Zero(nw));
for (int phase = 0; phase < np; ++phase) {
const ADB& q_ps = wellOps().p2w * cq_ps[phase];
const ADB& q_s = subset(state.qs, Span(nw, 1, phase*nw));
Selector<double> injectingPhase_selector(q_s.value(), Selector<double>::GreaterZero);
const int pos = pu.phase_pos[phase];
wbq[phase] = (compi.col(pos) * injectingPhase_selector.select(q_s,ADB::constant(Vector::Zero(nw)))) - q_ps;
wbqt += wbq[phase];
}
// compute wellbore mixture at standard conditions.
Selector<double> notDeadWells_selector(wbqt.value(), Selector<double>::Zero);
std::vector<ADB> cmix_s(np, ADB::null());
for (int phase = 0; phase < np; ++phase) {
const int pos = pu.phase_pos[phase];
cmix_s[phase] = wellOps().w2p * notDeadWells_selector.select(ADB::constant(compi.col(pos)), wbq[phase]/wbqt);
}
// compute volume ratio between connection at standard conditions
ADB volumeRatio = ADB::constant(Vector::Zero(nperf));
if ((*active_)[Water]) {
const int watpos = pu.phase_pos[Water];
volumeRatio += cmix_s[watpos] / b_perfcells[watpos];
}
if ((*active_)[Oil] && (*active_)[Gas]) {
// Incorporate RS/RV factors if both oil and gas active
const ADB& rv_perfcells = subset(state.rv, well_cells);
const ADB& rs_perfcells = subset(state.rs, well_cells);
const ADB d = Vector::Constant(nperf,1.0) - rv_perfcells * rs_perfcells;
const int oilpos = pu.phase_pos[Oil];
const int gaspos = pu.phase_pos[Gas];
const ADB tmp_oil = (cmix_s[oilpos] - rv_perfcells * cmix_s[gaspos]) / d;
volumeRatio += tmp_oil / b_perfcells[oilpos];
const ADB tmp_gas = (cmix_s[gaspos] - rs_perfcells * cmix_s[oilpos]) / d;
volumeRatio += tmp_gas / b_perfcells[gaspos];
}
else {
if ((*active_)[Oil]) {
const int oilpos = pu.phase_pos[Oil];
volumeRatio += cmix_s[oilpos] / b_perfcells[oilpos];
}
if ((*active_)[Gas]) {
const int gaspos = pu.phase_pos[Gas];
volumeRatio += cmix_s[gaspos] / b_perfcells[gaspos];
}
}
// injecting connections total volumerates at standard conditions
ADB cqt_is = cqt_i/volumeRatio;
// connection phase volumerates at standard conditions
cq_s.resize(np, ADB::null());
for (int phase = 0; phase < np; ++phase) {
cq_s[phase] = cq_ps[phase] + cmix_s[phase]*cqt_is;
}
// check for dead wells (used in the well controll equations)
aliveWells = Vector::Constant(nw, 1.0);
for (int w = 0; w < nw; ++w) {
if (wbqt.value()[w] == 0) {
aliveWells[w] = 0.0;
}
}
}
template <class SolutionState, class WellState>
void
StandardWells::
updatePerfPhaseRatesAndPressures(const std::vector<ADB>& cq_s,
const SolutionState& state,
WellState& xw) const
{
if ( !localWellsActive() )
{
// If there are no wells in the subdomain of the proces then
// cq_s has zero size and will cause a segmentation fault below.
return;
}
// Update the perforation phase rates (used to calculate the pressure drop in the wellbore).
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
const int nperf = wells().well_connpos[nw];
Vector cq = superset(cq_s[0].value(), Span(nperf, np, 0), nperf*np);
for (int phase = 1; phase < np; ++phase) {
cq += superset(cq_s[phase].value(), Span(nperf, np, phase), nperf*np);
}
xw.perfPhaseRates().assign(cq.data(), cq.data() + nperf*np);
// Update the perforation pressures.
const Vector& cdp = wellPerforationPressureDiffs();
const Vector perfpressure = (wellOps().w2p * state.bhp.value().matrix()).array() + cdp;
xw.perfPress().assign(perfpressure.data(), perfpressure.data() + nperf);
}
template <class WellState>
void
StandardWells::
updateWellState(const Vector& dwells,
const double dpmaxrel,
WellState& well_state)
{
if( localWellsActive() )
{
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
// Extract parts of dwells corresponding to each part.
int varstart = 0;
const Vector dqs = subset(dwells, Span(np*nw, 1, varstart));
varstart += dqs.size();
const Vector dbhp = subset(dwells, Span(nw, 1, varstart));
varstart += dbhp.size();
assert(varstart == dwells.size());
// Qs update.
// Since we need to update the wellrates, that are ordered by wells,
// from dqs which are ordered by phase, the simplest is to compute
// dwr, which is the data from dqs but ordered by wells.
const DataBlock wwr = Eigen::Map<const DataBlock>(dqs.data(), np, nw).transpose();
const Vector dwr = Eigen::Map<const Vector>(wwr.data(), nw*np);
const Vector wr_old = Eigen::Map<const Vector>(&well_state.wellRates()[0], nw*np);
const Vector wr = wr_old - dwr;
std::copy(&wr[0], &wr[0] + wr.size(), well_state.wellRates().begin());
// Bhp update.
const Vector bhp_old = Eigen::Map<const Vector>(&well_state.bhp()[0], nw, 1);
const Vector dbhp_limited = sign(dbhp) * dbhp.abs().min(bhp_old.abs()*dpmaxrel);
const Vector bhp = bhp_old - dbhp_limited;
std::copy(&bhp[0], &bhp[0] + bhp.size(), well_state.bhp().begin());
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
//Loop over all wells
#pragma omp parallel for schedule(static)
for (int w = 0; w < nw; ++w) {
const WellControls* wc = wells().ctrls[w];
const int nwc = well_controls_get_num(wc);
//Loop over all controls until we find a THP control
//that specifies what we need...
//Will only update THP for wells with THP control
for (int ctrl_index=0; ctrl_index < nwc; ++ctrl_index) {
if (well_controls_iget_type(wc, ctrl_index) == THP) {
double aqua = 0.0;
double liquid = 0.0;
double vapour = 0.0;
if ((*active_)[ Water ]) {
aqua = wr[w*np + pu.phase_pos[ Water ] ];
}
if ((*active_)[ Oil ]) {
liquid = wr[w*np + pu.phase_pos[ Oil ] ];
}
if ((*active_)[ Gas ]) {
vapour = wr[w*np + pu.phase_pos[ Gas ] ];
}
double alq = well_controls_iget_alq(wc, ctrl_index);
int table_id = well_controls_iget_vfp(wc, ctrl_index);
const WellType& well_type = wells().type[w];
const int perf = wells().well_connpos[w]; //first perforation.
if (well_type == INJECTOR) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), w, vfp_properties_->getInj()->getTable(table_id)->getDatumDepth(),
wellPerforationDensities()[perf], gravity_);
well_state.thp()[w] = vfp_properties_->getInj()->thp(table_id, aqua, liquid, vapour, bhp[w] + dp);
}
else if (well_type == PRODUCER) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), w, vfp_properties_->getProd()->getTable(table_id)->getDatumDepth(),
wellPerforationDensities()[perf], gravity_);
well_state.thp()[w] = vfp_properties_->getProd()->thp(table_id, aqua, liquid, vapour, bhp[w] + dp, alq);
}
else {
OPM_THROW(std::logic_error, "Expected INJECTOR or PRODUCER well");
}
//Assume only one THP control specified for each well
break;
}
}
}
}
}
template <class WellState>
void
StandardWells::
updateWellControls(WellState& xw) const
{
wellhelpers::WellSwitchingLogger logger;
if( !localWellsActive() ) return ;
// Find, for each well, if any constraints are broken. If so,
// switch control to first broken constraint.
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
#pragma omp parallel for schedule(dynamic)
for (int w = 0; w < nw; ++w) {
const WellControls* wc = wells().ctrls[w];
// The current control in the well state overrides
// the current control set in the Wells struct, which
// is instead treated as a default.
int current = xw.currentControls()[w];
// Loop over all controls except the current one, and also
// skip any RESERVOIR_RATE controls, since we cannot
// handle those.
const int nwc = well_controls_get_num(wc);
// There should be at least one control
assert(nwc != 0);
bool constraint_violated = false;
int number_iterations = 0;
const int max_iterations = 2 * nwc; // maximum allowed iterations
do {
updateWellStateWithTarget(wc, current, w, xw);
int ctrl_index = 0;
for (; ctrl_index < nwc; ++ctrl_index) {
if (ctrl_index == current) {
// This is the currently used control, so it is
// used as an equation. So this is not used as an
// inequality constraint, and therefore skipped.
continue;
}
if (wellhelpers::constraintBroken(
xw.bhp(), xw.thp(), xw.wellRates(),
w, np, wells().type[w], wc, ctrl_index)) {
// ctrl_index will be the index of the broken constraint after the loop.
break;
}
}
if (ctrl_index != nwc) {
// Constraint number ctrl_index was broken, switch to it.
// We disregard terminal_ouput here as with it only messages
// for wells on one process will be printed.
logger.wellSwitched(wells().name[w],
well_controls_iget_type(wc, current),
well_controls_iget_type(wc, ctrl_index));
xw.currentControls()[w] = ctrl_index;
current = xw.currentControls()[w];
constraint_violated = true;
} else {
constraint_violated = false;
}
++number_iterations;
if (number_iterations > max_iterations) {
OPM_THROW(Opm::NumericalProblem, "Could not find proper control within " << number_iterations << " iterations!");
break;
}
} while (constraint_violated);
if (wellCollection()->groupControlActive()) {
// get well node in the well collection
WellNode& well_node = well_collection_->findWellNode(std::string(wells().name[w]));
// update whehter the well is under group control or individual control
if (well_node.groupControlIndex() >= 0 && current == well_node.groupControlIndex()) {
// under group control
well_node.setIndividualControl(false);
} else {
// individual control
well_node.setIndividualControl(true);
}
}
}
}
template <class SolutionState>
void
StandardWells::
addWellFluxEq(const std::vector<ADB>& cq_s,
const SolutionState& state,
LinearisedBlackoilResidual& residual)
{
if( !localWellsActive() )
{
// If there are no wells in the subdomain of the proces then
// cq_s has zero size and will cause a segmentation fault below.
return;
}
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
ADB qs = state.qs;
for (int phase = 0; phase < np; ++phase) {
qs -= superset(wellOps().p2w * cq_s[phase], Span(nw, 1, phase*nw), nw*np);
}
residual.well_flux_eq = qs;
}
template <class SolutionState, class WellState>
void
StandardWells::addWellControlEq(const SolutionState& state,
const WellState& xw,
const Vector& aliveWells,
LinearisedBlackoilResidual& residual)
{
if( ! localWellsActive() ) return;
const int np = wells().number_of_phases;
const int nw = wells().number_of_wells;
ADB aqua = ADB::constant(Vector::Zero(nw));
ADB liquid = ADB::constant(Vector::Zero(nw));
ADB vapour = ADB::constant(Vector::Zero(nw));
if ((*active_)[Water]) {
aqua += subset(state.qs, Span(nw, 1, BlackoilPhases::Aqua*nw));
}
if ((*active_)[Oil]) {
liquid += subset(state.qs, Span(nw, 1, BlackoilPhases::Liquid*nw));
}
if ((*active_)[Gas]) {
vapour += subset(state.qs, Span(nw, 1, BlackoilPhases::Vapour*nw));
}
//THP calculation variables
std::vector<int> inj_table_id(nw, -1);
std::vector<int> prod_table_id(nw, -1);
Vector thp_inj_target_v = Vector::Zero(nw);
Vector thp_prod_target_v = Vector::Zero(nw);
Vector alq_v = Vector::Zero(nw);
//Hydrostatic correction variables
Vector rho_v = Vector::Zero(nw);
Vector vfp_ref_depth_v = Vector::Zero(nw);
//Target vars
Vector bhp_targets = Vector::Zero(nw);
Vector rate_targets = Vector::Zero(nw);
Eigen::SparseMatrix<double> rate_distr(nw, np*nw);
//Selection variables
std::vector<int> bhp_elems;
std::vector<int> thp_inj_elems;
std::vector<int> thp_prod_elems;
std::vector<int> rate_elems;
//Run through all wells to calculate BHP/RATE targets
//and gather info about current control
for (int w = 0; w < nw; ++w) {
auto wc = wells().ctrls[w];
// The current control in the well state overrides
// the current control set in the Wells struct, which
// is instead treated as a default.
const int current = xw.currentControls()[w];
switch (well_controls_iget_type(wc, current)) {
case BHP:
{
bhp_elems.push_back(w);
bhp_targets(w) = well_controls_iget_target(wc, current);
rate_targets(w) = -1e100;
}
break;
case THP:
{
const int perf = wells().well_connpos[w];
rho_v[w] = wellPerforationDensities()[perf];
const int table_id = well_controls_iget_vfp(wc, current);
const double target = well_controls_iget_target(wc, current);
const WellType& well_type = wells().type[w];
if (well_type == INJECTOR) {
inj_table_id[w] = table_id;
thp_inj_target_v[w] = target;
alq_v[w] = -1e100;
vfp_ref_depth_v[w] = vfp_properties_->getInj()->getTable(table_id)->getDatumDepth();
thp_inj_elems.push_back(w);
}
else if (well_type == PRODUCER) {
prod_table_id[w] = table_id;
thp_prod_target_v[w] = target;
alq_v[w] = well_controls_iget_alq(wc, current);
vfp_ref_depth_v[w] = vfp_properties_->getProd()->getTable(table_id)->getDatumDepth();
thp_prod_elems.push_back(w);
}
else {
OPM_THROW(std::logic_error, "Expected INJECTOR or PRODUCER type well");
}
bhp_targets(w) = -1e100;
rate_targets(w) = -1e100;
}
break;
case RESERVOIR_RATE: // Intentional fall-through
case SURFACE_RATE:
{
rate_elems.push_back(w);
// RESERVOIR and SURFACE rates look the same, from a
// high-level point of view, in the system of
// simultaneous linear equations.
const double* const distr =
well_controls_iget_distr(wc, current);
for (int p = 0; p < np; ++p) {
rate_distr.insert(w, p*nw + w) = distr[p];
}
bhp_targets(w) = -1.0e100;
rate_targets(w) = well_controls_iget_target(wc, current);
}
break;
}
}
//Calculate BHP target from THP
const ADB thp_inj_target = ADB::constant(thp_inj_target_v);
const ADB thp_prod_target = ADB::constant(thp_prod_target_v);
const ADB alq = ADB::constant(alq_v);
const ADB bhp_from_thp_inj = vfp_properties_->getInj()->bhp(inj_table_id, aqua, liquid, vapour, thp_inj_target);
const ADB bhp_from_thp_prod = vfp_properties_->getProd()->bhp(prod_table_id, aqua, liquid, vapour, thp_prod_target, alq);
//Perform hydrostatic correction to computed targets
const Vector dp_v = wellhelpers::computeHydrostaticCorrection(wells(), vfp_ref_depth_v, wellPerforationDensities(), gravity_);
const ADB dp = ADB::constant(dp_v);
const ADB dp_inj = superset(subset(dp, thp_inj_elems), thp_inj_elems, nw);
const ADB dp_prod = superset(subset(dp, thp_prod_elems), thp_prod_elems, nw);
//Calculate residuals
const ADB thp_inj_residual = state.bhp - bhp_from_thp_inj + dp_inj;
const ADB thp_prod_residual = state.bhp - bhp_from_thp_prod + dp_prod;
const ADB bhp_residual = state.bhp - bhp_targets;
const ADB rate_residual = rate_distr * state.qs - rate_targets;
//Select the right residual for each well
residual.well_eq = superset(subset(bhp_residual, bhp_elems), bhp_elems, nw) +
superset(subset(thp_inj_residual, thp_inj_elems), thp_inj_elems, nw) +
superset(subset(thp_prod_residual, thp_prod_elems), thp_prod_elems, nw) +
superset(subset(rate_residual, rate_elems), rate_elems, nw);
// For wells that are dead (not flowing), and therefore not communicating
// with the reservoir, we set the equation to be equal to the well's total
// flow. This will be a solution only if the target rate is also zero.
Eigen::SparseMatrix<double> rate_summer(nw, np*nw);
for (int w = 0; w < nw; ++w) {
for (int phase = 0; phase < np; ++phase) {
rate_summer.insert(w, phase*nw + w) = 1.0;
}
}
Selector<double> alive_selector(aliveWells, Selector<double>::NotEqualZero);
residual.well_eq = alive_selector.select(residual.well_eq, rate_summer * state.qs);
// OPM_AD_DUMP(residual_.well_eq);
}
template <class SolutionState, class WellState>
void
StandardWells::computeWellPotentials(const std::vector<ADB>& mob_perfcells,
const std::vector<ADB>& b_perfcells,
const WellState& well_state,
SolutionState& state0,
std::vector<double>& well_potentials) const
{
const int nw = wells().number_of_wells;
const int np = wells().number_of_phases;
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
Vector bhps = Vector::Zero(nw);
for (int w = 0; w < nw; ++w) {
const WellControls* ctrl = wells().ctrls[w];
const int nwc = well_controls_get_num(ctrl);
//Loop over all controls until we find a BHP control
//or a THP control that specifies what we need.
//Pick the value that gives the most restrictive flow
for (int ctrl_index=0; ctrl_index < nwc; ++ctrl_index) {
if (well_controls_iget_type(ctrl, ctrl_index) == BHP) {
bhps[w] = well_controls_iget_target(ctrl, ctrl_index);
}
if (well_controls_iget_type(ctrl, ctrl_index) == THP) {
double aqua = 0.0;
double liquid = 0.0;
double vapour = 0.0;
if ((*active_)[ Water ]) {
aqua = well_state.wellRates()[w*np + pu.phase_pos[ Water ] ];
}
if ((*active_)[ Oil ]) {
liquid = well_state.wellRates()[w*np + pu.phase_pos[ Oil ] ];
}
if ((*active_)[ Gas ]) {
vapour = well_state.wellRates()[w*np + pu.phase_pos[ Gas ] ];
}
const int vfp = well_controls_iget_vfp(ctrl, ctrl_index);
const double& thp = well_controls_iget_target(ctrl, ctrl_index);
const double& alq = well_controls_iget_alq(ctrl, ctrl_index);
//Set *BHP* target by calculating bhp from THP
const WellType& well_type = wells().type[w];
const int perf = wells().well_connpos[w]; //first perforation
if (well_type == INJECTOR) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), w, vfp_properties_->getInj()->getTable(vfp)->getDatumDepth(),
wellPerforationDensities()[perf], gravity_);
const double bhp = vfp_properties_->getInj()->bhp(vfp, aqua, liquid, vapour, thp) - dp;
// apply the strictest of the bhp controlls i.e. smallest bhp for injectors
if ( bhp < bhps[w]) {
bhps[w] = bhp;
}
}
else if (well_type == PRODUCER) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), w, vfp_properties_->getProd()->getTable(vfp)->getDatumDepth(),
wellPerforationDensities()[perf], gravity_);
const double bhp = 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 > bhps[w]) {
bhps[w] = bhp;
}
}
else {
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type of well");
}
}
}
}
// use bhp limit from control
state0.bhp = ADB::constant(bhps);
// compute well potentials
Vector aliveWells;
std::vector<ADB> perf_potentials;
computeWellFlux(state0, mob_perfcells, b_perfcells, aliveWells, perf_potentials);
well_potentials.resize(nw * np, 0.0);
for (int p = 0; p < np; ++p) {
for (int w = 0; w < nw; ++w) {
for (int perf = wells().well_connpos[w]; perf < wells().well_connpos[w + 1]; ++perf) {
well_potentials[w * np + p] += perf_potentials[p].value()[perf];
}
}
}
}
void
StandardWells::variableStateWellIndices(std::vector<int>& indices,
int& next) const
{
indices[Qs] = next++;
indices[Bhp] = next++;
}
template <class SolutionState>
void
StandardWells::
variableStateExtractWellsVars(const std::vector<int>& indices,
std::vector<ADB>& vars,
SolutionState& state) const
{
// Qs.
state.qs = std::move(vars[indices[Qs]]);
// Bhp.
state.bhp = std::move(vars[indices[Bhp]]);
}
std::vector<int>
StandardWells::variableWellStateIndices() const
{
// Black oil model standard is 5 equation.
// For the pure well solve, only the well equations are picked.
std::vector<int> indices(5, -1);
int next = 0;
variableStateWellIndices(indices, next);
assert(next == 2);
return indices;
}
template <class WellState>
void
StandardWells::variableWellStateInitials(const WellState& xw,
std::vector<Vector>& vars0) const
{
// Initial well rates.
if ( localWellsActive() )
{
// Need to reshuffle well rates, from phase running fastest
// to wells running fastest.
const int nw = wells().number_of_wells;
const int np = wells().number_of_phases;
// The transpose() below switches the ordering.
const DataBlock wrates = Eigen::Map<const DataBlock>(& xw.wellRates()[0], nw, np).transpose();
const Vector qs = Eigen::Map<const V>(wrates.data(), nw*np);
vars0.push_back(qs);
// Initial well bottom-hole pressure.
assert (not xw.bhp().empty());
const Vector bhp = Eigen::Map<const V>(& xw.bhp()[0], xw.bhp().size());
vars0.push_back(bhp);
}
else
{
// push null states for qs and bhp
vars0.push_back(V());
vars0.push_back(V());
}
}
void
StandardWells::setStoreWellPerforationFluxesFlag(const bool store_fluxes)
{
store_well_perforation_fluxes_ = store_fluxes;
}
const StandardWells::Vector&
StandardWells::getStoredWellPerforationFluxes() const
{
assert(store_well_perforation_fluxes_);
return well_perforation_fluxes_;
}
template<class WellState>
void
StandardWells::
updateListEconLimited(const Schedule& schedule,
const int current_step,
const Wells* wells_struct,
const WellState& well_state,
DynamicListEconLimited& list_econ_limited) const
{
// wells_struct may be null pointer if there are no wells in process domain
const int nw = ( wells_struct ) ? wells_struct->number_of_wells : 0;
for (int w = 0; w < nw; ++w) {
// flag to check if the mim oil/gas rate limit is violated
bool rate_limit_violated = false;
const std::string& well_name = wells_struct->name[w];
const Well* well_ecl = schedule.getWell(well_name);
const WellEconProductionLimits& econ_production_limits = well_ecl->getEconProductionLimits(current_step);
// economic limits only apply for production wells.
if (wells_struct->type[w] != PRODUCER) {
continue;
}
// if no limit is effective here, then continue to the next well
if ( !econ_production_limits.onAnyEffectiveLimit() ) {
continue;
}
// for the moment, we only handle rate limits, not handling potential limits
// the potential limits should not be difficult to add
const WellEcon::QuantityLimitEnum& quantity_limit = econ_production_limits.quantityLimit();
if (quantity_limit == WellEcon::POTN) {
const std::string msg = std::string("POTN limit for well ") + well_name + std::string(" is not supported for the moment. \n")
+ std::string("All the limits will be evaluated based on RATE. ");
OpmLog::warning("NOT_SUPPORTING_POTN", msg);
}
const WellMapType& well_map = well_state.wellMap();
const typename WellMapType::const_iterator i_well = well_map.find(well_name);
assert(i_well != well_map.end()); // should always be found?
const WellMapEntryType& map_entry = i_well->second;
const int well_number = map_entry[0];
if (econ_production_limits.onAnyRateLimit()) {
rate_limit_violated = checkRateEconLimits(econ_production_limits, well_state, well_number);
}
if (rate_limit_violated) {
if (econ_production_limits.endRun()) {
const std::string warning_message = std::string("ending run after well closed due to economic limits is not supported yet \n")
+ std::string("the program will keep running after ") + well_name + std::string(" is closed");
OpmLog::warning("NOT_SUPPORTING_ENDRUN", warning_message);
}
if (econ_production_limits.validFollowonWell()) {
OpmLog::warning("NOT_SUPPORTING_FOLLOWONWELL", "opening following on well after well closed is not supported yet");
}
if (well_ecl->getAutomaticShutIn()) {
list_econ_limited.addShutWell(well_name);
const std::string msg = std::string("well ") + well_name + std::string(" will be shut in due to economic limit");
OpmLog::info(msg);
} else {
list_econ_limited.addStoppedWell(well_name);
const std::string msg = std::string("well ") + well_name + std::string(" will be stopped due to economic limit");
OpmLog::info(msg);
}
// the well is closed, not need to check other limits
continue;
}
// checking for ratio related limits, mostly all kinds of ratio.
bool ratio_limits_violated = false;
RatioCheckTuple ratio_check_return;
if (econ_production_limits.onAnyRatioLimit()) {
ratio_check_return = checkRatioEconLimits(econ_production_limits, well_state, map_entry);
ratio_limits_violated = std::get<0>(ratio_check_return);
}
if (ratio_limits_violated) {
const bool last_connection = std::get<1>(ratio_check_return);
const int worst_offending_connection = std::get<2>(ratio_check_return);
const int perf_start = map_entry[1];
assert((worst_offending_connection >= 0) && (worst_offending_connection < map_entry[2]));
const int cell_worst_offending_connection = wells_struct->well_cells[perf_start + worst_offending_connection];
list_econ_limited.addClosedConnectionsForWell(well_name, cell_worst_offending_connection);
const std::string msg = std::string("Connection ") + std::to_string(worst_offending_connection) + std::string(" for well ")
+ well_name + std::string(" will be closed due to economic limit");
OpmLog::info(msg);
if (last_connection) {
list_econ_limited.addShutWell(well_name);
const std::string msg2 = well_name + std::string(" will be shut due to the last connection closed");
OpmLog::info(msg2);
}
}
}
}
template <class WellState>
bool
StandardWells::
checkRateEconLimits(const WellEconProductionLimits& econ_production_limits,
const WellState& well_state,
const int well_number) const
{
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
const int np = well_state.numPhases();
if (econ_production_limits.onMinOilRate()) {
assert((*active_)[Oil]);
const double oil_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Oil ] ];
const double min_oil_rate = econ_production_limits.minOilRate();
if (std::abs(oil_rate) < min_oil_rate) {
return true;
}
}
if (econ_production_limits.onMinGasRate() ) {
assert((*active_)[Gas]);
const double gas_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Gas ] ];
const double min_gas_rate = econ_production_limits.minGasRate();
if (std::abs(gas_rate) < min_gas_rate) {
return true;
}
}
if (econ_production_limits.onMinLiquidRate() ) {
assert((*active_)[Oil]);
assert((*active_)[Water]);
const double oil_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Oil ] ];
const double water_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Water ] ];
const double liquid_rate = oil_rate + water_rate;
const double min_liquid_rate = econ_production_limits.minLiquidRate();
if (std::abs(liquid_rate) < min_liquid_rate) {
return true;
}
}
if (econ_production_limits.onMinReservoirFluidRate()) {
OpmLog::warning("NOT_SUPPORTING_MIN_RESERVOIR_FLUID_RATE", "Minimum reservoir fluid production rate limit is not supported yet");
}
return false;
}
template <class WellState>
StandardWells::RatioCheckTuple
StandardWells::
checkRatioEconLimits(const WellEconProductionLimits& econ_production_limits,
const WellState& well_state,
const WellMapEntryType& map_entry) const
{
// TODO: not sure how to define the worst-offending connection when more than one
// ratio related limit is violated.
// The defintion used here is that we define the violation extent based on the
// ratio between the value and the corresponding limit.
// For each violated limit, we decide the worst-offending connection separately.
// Among the worst-offending connections, we use the one has the biggest violation
// extent.
bool any_limit_violated = false;
bool last_connection = false;
int worst_offending_connection = INVALIDCONNECTION;
double violation_extent = -1.0;
if (econ_production_limits.onMaxWaterCut()) {
const RatioCheckTuple water_cut_return = checkMaxWaterCutLimit(econ_production_limits, well_state, map_entry);
bool water_cut_violated = std::get<0>(water_cut_return);
if (water_cut_violated) {
any_limit_violated = true;
const double violation_extent_water_cut = std::get<3>(water_cut_return);
if (violation_extent_water_cut > violation_extent) {
violation_extent = violation_extent_water_cut;
worst_offending_connection = std::get<2>(water_cut_return);
last_connection = std::get<1>(water_cut_return);
}
}
}
if (econ_production_limits.onMaxGasOilRatio()) {
OpmLog::warning("NOT_SUPPORTING_MAX_GOR", "the support for max Gas-Oil ratio is not implemented yet!");
}
if (econ_production_limits.onMaxWaterGasRatio()) {
OpmLog::warning("NOT_SUPPORTING_MAX_WGR", "the support for max Water-Gas ratio is not implemented yet!");
}
if (econ_production_limits.onMaxGasLiquidRatio()) {
OpmLog::warning("NOT_SUPPORTING_MAX_GLR", "the support for max Gas-Liquid ratio is not implemented yet!");
}
if (any_limit_violated) {
assert(worst_offending_connection >=0);
assert(violation_extent > 1.);
}
return std::make_tuple(any_limit_violated, last_connection, worst_offending_connection, violation_extent);
}
template <class WellState>
StandardWells::RatioCheckTuple
StandardWells::
checkMaxWaterCutLimit(const WellEconProductionLimits& econ_production_limits,
const WellState& well_state,
const WellMapEntryType& map_entry) const
{
bool water_cut_limit_violated = false;
int worst_offending_connection = INVALIDCONNECTION;
bool last_connection = false;
double violation_extent = -1.0;
const int np = well_state.numPhases();
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
const int well_number = map_entry[0];
assert((*active_)[Oil]);
assert((*active_)[Water]);
const double oil_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Oil ] ];
const double water_rate = well_state.wellRates()[well_number * np + pu.phase_pos[ Water ] ];
const double liquid_rate = oil_rate + water_rate;
double water_cut;
if (std::abs(liquid_rate) != 0.) {
water_cut = water_rate / liquid_rate;
} else {
water_cut = 0.0;
}
const double max_water_cut_limit = econ_production_limits.maxWaterCut();
if (water_cut > max_water_cut_limit) {
water_cut_limit_violated = true;
}
if (water_cut_limit_violated) {
// need to handle the worst_offending_connection
const int perf_start = map_entry[1];
const int perf_number = map_entry[2];
std::vector<double> water_cut_perf(perf_number);
for (int perf = 0; perf < perf_number; ++perf) {
const int i_perf = perf_start + perf;
const double oil_perf_rate = well_state.perfPhaseRates()[i_perf * np + pu.phase_pos[ Oil ] ];
const double water_perf_rate = well_state.perfPhaseRates()[i_perf * np + pu.phase_pos[ Water ] ];
const double liquid_perf_rate = oil_perf_rate + water_perf_rate;
if (std::abs(liquid_perf_rate) != 0.) {
water_cut_perf[perf] = water_perf_rate / liquid_perf_rate;
} else {
water_cut_perf[perf] = 0.;
}
}
last_connection = (perf_number == 1);
if (last_connection) {
worst_offending_connection = 0;
violation_extent = water_cut_perf[0] / max_water_cut_limit;
return std::make_tuple(water_cut_limit_violated, last_connection, worst_offending_connection, violation_extent);
}
double max_water_cut_perf = 0.;
for (int perf = 0; perf < perf_number; ++perf) {
if (water_cut_perf[perf] > max_water_cut_perf) {
worst_offending_connection = perf;
max_water_cut_perf = water_cut_perf[perf];
}
}
assert(max_water_cut_perf != 0.);
assert((worst_offending_connection >= 0) && (worst_offending_connection < perf_number));
violation_extent = max_water_cut_perf / max_water_cut_limit;
}
return std::make_tuple(water_cut_limit_violated, last_connection, worst_offending_connection, violation_extent);
}
WellCollection* StandardWells::wellCollection() const
{
return well_collection_;
}
void StandardWells::calculateEfficiencyFactors()
{
if ( !localWellsActive() ) {
return;
}
// get efficiency factor for each well first
const int nw = wells_->number_of_wells;
Vector well_efficiency_factors = Vector::Ones(nw);
for (int w = 0; w < nw; ++w) {
const std::string well_name = wells_->name[w];
const WellNode& well_node = well_collection_->findWellNode(well_name);
well_efficiency_factors(w) = well_node.getAccumulativeEfficiencyFactor();
}
// map them to the perforation.
well_perforation_efficiency_factors_ = wellOps().w2p * well_efficiency_factors.matrix();
}
const StandardWells::Vector&
StandardWells::wellPerfEfficiencyFactors() const
{
return well_perforation_efficiency_factors_;
}
template <class WellState>
void
StandardWells::
updateWellStateWithTarget(const WellControls* wc,
const int current,
const int well_index,
WellState& xw) const
{
const int np = wells().number_of_phases;
// Updating well state and primary variables.
// Target values are used as initial conditions for BHP, THP, and SURFACE_RATE
const double target = well_controls_iget_target(wc, current);
const double* distr = well_controls_iget_distr(wc, current);
switch (well_controls_iget_type(wc, current)) {
case BHP:
xw.bhp()[well_index] = target;
break;
case THP: {
double aqua = 0.0;
double liquid = 0.0;
double vapour = 0.0;
const Opm::PhaseUsage& pu = fluid_->phaseUsage();
if ((*active_)[ Water ]) {
aqua = xw.wellRates()[well_index*np + pu.phase_pos[ Water ] ];
}
if ((*active_)[ Oil ]) {
liquid = xw.wellRates()[well_index*np + pu.phase_pos[ Oil ] ];
}
if ((*active_)[ Gas ]) {
vapour = xw.wellRates()[well_index*np + pu.phase_pos[ Gas ] ];
}
const int vfp = well_controls_iget_vfp(wc, current);
const double& thp = well_controls_iget_target(wc, current);
const double& alq = well_controls_iget_alq(wc, current);
//Set *BHP* target by calculating bhp from THP
const WellType& well_type = wells().type[well_index];
// pick the density in the top layer
const int perf = wells().well_connpos[well_index];
const double rho = well_perforation_densities_[perf];
if (well_type == INJECTOR) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), well_index, vfp_properties_->getInj()->getTable(vfp)->getDatumDepth(),
rho, gravity_);
xw.bhp()[well_index] = vfp_properties_->getInj()->bhp(vfp, aqua, liquid, vapour, thp) - dp;
}
else if (well_type == PRODUCER) {
double dp = wellhelpers::computeHydrostaticCorrection(
wells(), well_index, vfp_properties_->getProd()->getTable(vfp)->getDatumDepth(),
rho, gravity_);
xw.bhp()[well_index] = vfp_properties_->getProd()->bhp(vfp, aqua, liquid, vapour, thp, alq) - dp;
}
else {
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type of well");
}
break;
}
case RESERVOIR_RATE:
// No direct change to any observable quantity at
// surface condition. In this case, use existing
// flow rates as initial conditions as reservoir
// rate acts only in aggregate.
break;
case SURFACE_RATE:
// assign target value as initial guess for injectors and
// single phase producers (orat, grat, wrat)
const WellType& well_type = wells().type[well_index];
if (well_type == INJECTOR) {
for (int phase = 0; phase < np; ++phase) {
const double& compi = wells().comp_frac[np * well_index + phase];
if (compi > 0.0) {
xw.wellRates()[np * well_index + phase] = target * compi;
}
}
} else if (well_type == PRODUCER) {
// only set target as initial rates for single phase
// producers. (orat, grat and wrat, and not lrat)
// lrat will result in numPhasesWithTargetsUnderThisControl == 2
int numPhasesWithTargetsUnderThisControl = 0;
for (int phase = 0; phase < np; ++phase) {
if (distr[phase] > 0.0) {
numPhasesWithTargetsUnderThisControl += 1;
}
}
for (int phase = 0; phase < np; ++phase) {
if (distr[phase] > 0.0 && numPhasesWithTargetsUnderThisControl < 2 ) {
xw.wellRates()[np * well_index + phase] = target * distr[phase];
}
}
} else {
OPM_THROW(std::logic_error, "Expected PRODUCER or INJECTOR type of well");
}
break;
}
}
} // namespace Opm
Reference in New Issue View Git Blame Copy Permalink