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https://github.com/OPM/opm-simulators.git
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26cd7ab993
The opm/core directory is no longer meaningful, and it contains only components which might collectively be described as simulator utilities.
253 lines
9.8 KiB
C++
253 lines
9.8 KiB
C++
/*
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Copyright 2021, Equinor
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This file is part of the Open Porous Media Project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPM_REGIONAVERAGECALCULATOR_HPP_HEADER_INCLUDED
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#define OPM_REGIONAVERAGECALCULATOR_HPP_HEADER_INCLUDED
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#include <opm/simulators/wells/RegionAttributeHelpers.hpp>
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#include <opm/simulators/utils/BlackoilPhases.hpp>
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#include <opm/simulators/utils/DeferredLoggingErrorHelpers.hpp>
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#include <dune/grid/common/gridenums.hh>
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#include <dune/grid/common/rangegenerators.hh>
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#include <algorithm>
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#include <cassert>
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#include <unordered_map>
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/**
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* \file
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* Facility for converting component rates at surface conditions to
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* phase (voidage) rates at reservoir conditions.
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*
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* This uses the average hydrocarbon pressure to define fluid
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* properties. The facility is intended to support Reservoir Voidage
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* rates only ('RESV').
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*/
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namespace Opm {
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namespace RegionAverageCalculator {
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/**
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* Computes hydrocarbon weighed average pressures over regions
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*
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* \tparam FluidSystem Fluid system class. Expected to be a BlackOilFluidSystem
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*
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* \tparam Region Type of a forward region mapping. Expected
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* to provide indexed access through \code operator[]()
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* \endcode as well as inner types \c value_type, \c
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* size_type, and \c const_iterator. Typically \code
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* std::vector<int> \endcode.
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*/
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template <class FluidSystem, class Region>
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class AverageRegionalPressure {
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public:
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using Scalar = typename FluidSystem::Scalar;
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/**
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* Constructor.
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*
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* \param[in] region Forward region mapping. Often
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* corresponds to the "FIPNUM" mapping of an ECLIPSE input
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* deck.
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*/
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AverageRegionalPressure(const PhaseUsage& phaseUsage,
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const Region& region)
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: phaseUsage_(phaseUsage)
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, rmap_ (region)
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, attr_ (rmap_, Attributes())
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{
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}
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/**
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* Compute pore volume averaged hydrocarbon state pressure
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*/
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template <typename ElementContext, class Simulator>
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void defineState(const Simulator& simulator)
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{
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int numRegions = 0;
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const auto& gridView = simulator.gridView();
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const auto& comm = gridView.comm();
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for (const auto& reg : rmap_.activeRegions()) {
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numRegions = std::max(numRegions, reg);
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}
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numRegions = comm.max(numRegions);
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for (int reg = 1; reg <= numRegions ; ++ reg) {
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if (!attr_.has(reg))
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attr_.insert(reg, Attributes());
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}
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// create map from cell to region
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// and set all attributes to zero
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for (int reg = 1; reg <= numRegions ; ++ reg) {
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auto& ra = attr_.attributes(reg);
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ra.pressure = 0.0;
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ra.pv = 0.0;
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}
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// quantities for pore volume average
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std::unordered_map<RegionId, Attributes> attributes_pv;
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// quantities for hydrocarbon volume average
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std::unordered_map<RegionId, Attributes> attributes_hpv;
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for (int reg = 1; reg <= numRegions ; ++ reg) {
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attributes_pv.insert({reg, Attributes()});
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attributes_hpv.insert({reg, Attributes()});
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}
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ElementContext elemCtx( simulator );
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OPM_BEGIN_PARALLEL_TRY_CATCH();
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for (const auto& elem : elements(gridView, Dune::Partitions::interior)) {
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elemCtx.updatePrimaryStencil(elem);
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elemCtx.updatePrimaryIntensiveQuantities(/*timeIdx=*/0);
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const unsigned cellIdx = elemCtx.globalSpaceIndex(/*spaceIdx=*/0, /*timeIdx=*/0);
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const auto& intQuants = elemCtx.intensiveQuantities(/*spaceIdx=*/0, /*timeIdx=*/0);
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const auto& fs = intQuants.fluidState();
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// use pore volume weighted averages.
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const Scalar pv_cell =
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simulator.model().dofTotalVolume(cellIdx)
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* intQuants.porosity().value();
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// only count oil and gas filled parts of the domain
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Scalar hydrocarbon = 1.0;
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const auto& pu = phaseUsage_;
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if (RegionAttributeHelpers::PhaseUsed::water(pu)) {
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hydrocarbon -= fs.saturation(FluidSystem::waterPhaseIdx).value();
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}
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const int reg = rmap_.region(cellIdx);
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assert(reg >= 0);
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// sum p, rs, rv, and T.
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const Scalar hydrocarbonPV = pv_cell*hydrocarbon;
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if (hydrocarbonPV > 0.) {
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auto& attr = attributes_hpv[reg];
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attr.pv += hydrocarbonPV;
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if (RegionAttributeHelpers::PhaseUsed::oil(pu)) {
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attr.pressure += fs.pressure(FluidSystem::oilPhaseIdx).value() * hydrocarbonPV;
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} else {
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assert(RegionAttributeHelpers::PhaseUsed::gas(pu));
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attr.pressure += fs.pressure(FluidSystem::gasPhaseIdx).value() * hydrocarbonPV;
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}
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}
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if (pv_cell > 0.) {
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auto& attr = attributes_pv[reg];
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attr.pv += pv_cell;
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if (RegionAttributeHelpers::PhaseUsed::oil(pu)) {
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attr.pressure += fs.pressure(FluidSystem::oilPhaseIdx).value() * pv_cell;
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} else if (RegionAttributeHelpers::PhaseUsed::gas(pu)) {
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attr.pressure += fs.pressure(FluidSystem::gasPhaseIdx).value() * pv_cell;
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} else {
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assert(RegionAttributeHelpers::PhaseUsed::water(pu));
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attr.pressure += fs.pressure(FluidSystem::waterPhaseIdx).value() * pv_cell;
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}
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}
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}
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OPM_END_PARALLEL_TRY_CATCH("AverageRegionalPressure::defineState(): ", simulator.vanguard().grid().comm());
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for (int reg = 1; reg <= numRegions ; ++ reg) {
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auto& ra = attr_.attributes(reg);
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const Scalar hpv_sum = comm.sum(attributes_hpv[reg].pv);
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// TODO: should we have some epsilon here instead of zero?
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if (hpv_sum > 0.) {
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const auto& attri_hpv = attributes_hpv[reg];
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const Scalar p_hpv_sum = comm.sum(attri_hpv.pressure);
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ra.pressure = p_hpv_sum / hpv_sum;
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} else {
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// using the pore volume to do the averaging
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const auto& attri_pv = attributes_pv[reg];
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const Scalar pv_sum = comm.sum(attri_pv.pv);
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// pore volums can be zero if a fipnum region is empty
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if (pv_sum > 0) {
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const Scalar p_pv_sum = comm.sum(attri_pv.pressure);
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ra.pressure = p_pv_sum / pv_sum;
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}
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}
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}
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}
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/**
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* Region identifier.
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*
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* Integral type.
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*/
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typedef typename RegionMapping<Region>::RegionId RegionId;
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/**
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* Average pressure
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*
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*/
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Scalar
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pressure(const RegionId r) const
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{
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if (r == 0 ) // region 0 is the whole field
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{
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Scalar pressure = 0.0;
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int num_active_regions = 0;
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for (const auto& attr : attr_.attributes()) {
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const auto& value = *attr.second;
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const auto& ra = value.attr_;
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pressure += ra.pressure;
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num_active_regions ++;
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}
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return pressure / num_active_regions;
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}
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const auto& ra = attr_.attributes(r);
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return ra.pressure;
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}
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private:
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/**
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* Fluid property object.
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*/
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const PhaseUsage phaseUsage_;
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/**
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* "Fluid-in-place" region mapping (forward and reverse).
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*/
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const RegionMapping<Region> rmap_;
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/**
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* Derived property attributes for each active region.
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*/
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struct Attributes {
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Attributes()
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: pressure(0.0)
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, pv(0.0)
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{}
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Scalar pressure;
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Scalar pv;
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};
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RegionAttributeHelpers::RegionAttributes<RegionId, Attributes> attr_;
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};
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} // namespace RegionAverageCalculator
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} // namespace Opm
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#endif /* OPM_REGIONAVERAGECALCULATOR_HPP_HEADER_INCLUDED */
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