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https://github.com/OPM/opm-simulators.git
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359 lines
15 KiB
C++
359 lines
15 KiB
C++
/*
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Copyright 2017 SINTEF Digital, Mathematics and Cybernetics.
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Copyright 2017 Statoil ASA.
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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_MULTISEGMENTWELL_HEADER_INCLUDED
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#define OPM_MULTISEGMENTWELL_HEADER_INCLUDED
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#include <opm/autodiff/WellInterface.hpp>
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namespace Opm
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{
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template<typename TypeTag>
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class MultisegmentWell: public WellInterface<TypeTag>
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{
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public:
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typedef WellInterface<TypeTag> Base;
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using typename Base::WellState;
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using typename Base::Simulator;
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using typename Base::IntensiveQuantities;
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using typename Base::FluidSystem;
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using typename Base::ModelParameters;
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using typename Base::MaterialLaw;
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using typename Base::BlackoilIndices;
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using typename Base::RateConverterType;
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/// the number of reservior equations
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using Base::numEq;
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using Base::has_solvent;
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using Base::has_polymer;
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using Base::Water;
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using Base::Oil;
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using Base::Gas;
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// TODO: for now, not considering the polymer, solvent and so on to simplify the development process.
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// TODO: we need to have order for the primary variables and also the order for the well equations.
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// sometimes, they are similar, while sometimes, they can have very different forms.
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// TODO: the following system looks not rather flexible. Looking into all kinds of possibilities
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// TODO: gas is always there? how about oil water case?
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// Is it gas oil two phase case?
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static const bool gasoil = numEq == 2 && (BlackoilIndices::compositionSwitchIdx >= 0);
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static const int GTotal = 0;
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static const int WFrac = gasoil? -1000: 1;
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static const int GFrac = gasoil? 1 : 2;
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static const int SPres = gasoil? 2 : 3;
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/// the number of well equations // TODO: it should have a more general strategy for it
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static const int numWellEq = GET_PROP_VALUE(TypeTag, EnablePolymer)? numEq : numEq + 1;
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using typename Base::Scalar;
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using typename Base::ConvergenceReport;
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/// the matrix and vector types for the reservoir
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using typename Base::Mat;
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using typename Base::BVector;
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using typename Base::Eval;
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// sparsity pattern for the matrices
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// [A C^T [x = [ res
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// B D ] x_well] res_well]
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// the vector type for the res_well and x_well
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typedef Dune::FieldVector<Scalar, numWellEq> VectorBlockWellType;
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typedef Dune::BlockVector<VectorBlockWellType> BVectorWell;
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// the matrix type for the diagonal matrix D
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typedef Dune::FieldMatrix<Scalar, numWellEq, numWellEq > DiagMatrixBlockWellType;
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typedef Dune::BCRSMatrix <DiagMatrixBlockWellType> DiagMatWell;
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// the matrix type for the non-diagonal matrix B and C^T
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typedef Dune::FieldMatrix<Scalar, numWellEq, numEq> OffDiagMatrixBlockWellType;
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typedef Dune::BCRSMatrix<OffDiagMatrixBlockWellType> OffDiagMatWell;
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// TODO: for more efficient implementation, we should have EvalReservoir, EvalWell, and EvalRerservoirAndWell
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// EvalR (Eval), EvalW, EvalRW
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// TODO: for now, we only use one type to save some implementation efforts, while improve later.
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typedef DenseAd::Evaluation<double, /*size=*/numEq + numWellEq> EvalWell;
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MultisegmentWell(const Well* well, const int time_step, const Wells* wells,
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const ModelParameters& param,
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const RateConverterType& rate_converter,
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const int pvtRegionIdx,
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const int num_components);
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virtual void init(const PhaseUsage* phase_usage_arg,
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const std::vector<bool>* active_arg,
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const std::vector<double>& depth_arg,
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const double gravity_arg,
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const int num_cells);
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virtual void initPrimaryVariablesEvaluation() const;
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virtual void assembleWellEq(Simulator& ebosSimulator,
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const double dt,
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WellState& well_state,
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bool only_wells);
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/// updating the well state based the control mode specified with current
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// TODO: later will check wheter we need current
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virtual void updateWellStateWithTarget(const int current,
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WellState& well_state) const;
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/// check whether the well equations get converged for this well
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virtual ConvergenceReport getWellConvergence(const std::vector<double>& B_avg) const;
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/// Ax = Ax - C D^-1 B x
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virtual void apply(const BVector& x, BVector& Ax) const;
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/// r = r - C D^-1 Rw
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virtual void apply(BVector& r) const;
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/// using the solution x to recover the solution xw for wells and applying
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/// xw to update Well State
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virtual void recoverWellSolutionAndUpdateWellState(const BVector& x,
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WellState& well_state) const;
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/// computing the well potentials for group control
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virtual void computeWellPotentials(const Simulator& ebosSimulator,
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const WellState& well_state,
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std::vector<double>& well_potentials);
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virtual void updatePrimaryVariables(const WellState& well_state) const;
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virtual void solveEqAndUpdateWellState(WellState& well_state); // const?
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virtual void calculateExplicitQuantities(const Simulator& ebosSimulator,
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const WellState& well_state); // should be const?
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/// number of segments for this well
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/// int number_of_segments_;
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int numberOfSegments() const;
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int numberOfPerforations() const;
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protected:
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int number_segments_;
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// components of the pressure drop to be included
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WellSegment::CompPressureDropEnum compPressureDrop() const;
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// multi-phase flow model
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WellSegment::MultiPhaseModelEnum multiphaseModel() const;
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// get the SegmentSet from the well_ecl_
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const SegmentSet& segmentSet() const;
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// protected member variables from the Base class
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using Base::well_ecl_;
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using Base::number_of_perforations_; // TODO: can use well_ecl_?
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using Base::current_step_;
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using Base::index_of_well_;
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using Base::number_of_phases_;
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// TODO: the current implementation really relies on the order of the
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// perforation does not change from the parser to Wells structure.
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using Base::well_cells_;
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using Base::param_;
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using Base::well_index_;
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using Base::well_type_;
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using Base::first_perf_;
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using Base::saturation_table_number_;
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using Base::well_efficiency_factor_;
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using Base::gravity_;
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using Base::well_controls_;
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using Base::perf_depth_;
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using Base::num_components_;
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// protected functions from the Base class
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using Base::active;
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using Base::phaseUsage;
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using Base::name;
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using Base::flowPhaseToEbosPhaseIdx;
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using Base::flowPhaseToEbosCompIdx;
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using Base::getAllowCrossFlow;
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using Base::scalingFactor;
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// TODO: trying to use the information from the Well opm-parser as much
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// as possible, it will possibly be re-implemented later for efficiency reason.
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// the completions that is related to each segment
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// the completions's ids are their index in the vector well_index_, well_cell_
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// This is also assuming the order of the completions in Well is the same with
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// the order of the completions in wells.
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// it is for convinience reason. we can just calcuate the inforation for segment once then using it for all the perofrations
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// belonging to this segment
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std::vector<std::vector<int> > segment_perforations_;
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// the inlet segments for each segment. It is for convinience and efficiency reason
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std::vector<std::vector<int> > segment_inlets_;
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// segment number is an ID of the segment, it is specified in the deck
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// get the loation of the segment with a segment number in the segmentSet
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int segmentNumberToIndex(const int segment_number) const;
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// TODO, the following should go to a class for computing purpose
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// two off-diagonal matrices
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mutable OffDiagMatWell duneB_;
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mutable OffDiagMatWell duneC_;
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// diagonal matrix for the well
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mutable DiagMatWell duneD_;
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// residuals of the well equations
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mutable BVectorWell resWell_;
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// the values for the primary varibles
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// based on different solutioin strategies, the wells can have different primary variables
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mutable std::vector<std::array<double, numWellEq> > primary_variables_;
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// the Evaluation for the well primary variables, which contain derivativles and are used in AD calculation
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mutable std::vector<std::array<EvalWell, numWellEq> > primary_variables_evaluation_;
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// depth difference between perforations and the perforated grid cells
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std::vector<double> cell_perforation_depth_diffs_;
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// pressure correction due to the different depth of the perforation and
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// center depth of the grid block
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std::vector<double> cell_perforation_pressure_diffs_;
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// depth difference between the segment and the peforation
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// or in another way, the depth difference between the perforation and
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// the segment the perforation belongs to
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std::vector<double> perforation_segment_depth_diffs_;
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// the intial component compistion of segments
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std::vector<std::vector<double> > segment_comp_initial_;
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// the densities of segment fluids
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// we should not have this member variable
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std::vector<EvalWell> segment_densities_;
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// the viscosity of the segments
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std::vector<EvalWell> segment_viscosities_;
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// the mass rate of the segments
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std::vector<EvalWell> segment_mass_rates_;
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std::vector<double> segment_depth_diffs_;
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void initMatrixAndVectors(const int num_cells) const;
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// protected functions
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// EvalWell getBhp(); this one should be something similar to getSegmentPressure();
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// EvalWell getQs(); this one should be something similar to getSegmentRates()
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// EValWell wellVolumeFractionScaled, wellVolumeFraction, wellSurfaceVolumeFraction ... these should have different names, and probably will be needed.
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// bool crossFlowAllowed(const Simulator& ebosSimulator) const; probably will be needed
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// xw = inv(D)*(rw - C*x)
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void recoverSolutionWell(const BVector& x, BVectorWell& xw) const;
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// updating the well_state based on well solution dwells
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void updateWellState(const BVectorWell& dwells,
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const bool inner_iteration,
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WellState& well_state) const;
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// initialize the segment rates with well rates
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// when there is no more accurate way to initialize the segment rates, we initialize
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// the segment rates based on well rates with a simple strategy
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void initSegmentRatesWithWellRates(WellState& well_state) const;
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// computing the accumulation term for later use in well mass equations
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void computeInitialComposition();
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// compute the pressure difference between the perforation and cell center
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void computePerfCellPressDiffs(const Simulator& ebosSimulator);
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// fraction value of the primary variables
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// should we just use member variables to store them instead of calculating them again and again
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EvalWell volumeFraction(const int seg, const int comp_idx) const;
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// F_p / g_p, the basic usage of this value is because Q_p = G_t * F_p / G_p
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EvalWell volumeFractionScaled(const int seg, const int comp_idx) const;
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// basically Q_p / \sigma_p Q_p
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EvalWell surfaceVolumeFraction(const int seg, const int comp_idx) const;
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void computePerfRate(const IntensiveQuantities& int_quants,
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const std::vector<EvalWell>& mob_perfcells,
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const int seg,
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const int perf,
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const EvalWell& segment_pressure,
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const bool& allow_cf,
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std::vector<EvalWell>& cq_s) const;
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// convert a Eval from reservoir to contain the derivative related to wells
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EvalWell extendEval(const Eval& in) const;
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// compute the fluid properties, such as densities, viscosities, and so on, in the segments
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// They will be treated implicitly, so they need to be of Evaluation type
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void computeSegmentFluidProperties(const Simulator& ebosSimulator);
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EvalWell getSegmentPressure(const int seg) const;
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EvalWell getSegmentRate(const int seg, const int comp_idx) const;
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EvalWell getSegmentGTotal(const int seg) const;
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// get the mobility for specific perforation
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void getMobility(const Simulator& ebosSimulator,
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const int perf,
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std::vector<EvalWell>& mob) const;
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void assembleControlEq() const;
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void assemblePressureEq(const int seg) const;
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// hytrostatic pressure loss
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EvalWell getHydroPressureLoss(const int seg) const;
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// frictinal pressure loss
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EvalWell getFrictionPressureLoss(const int seg) const;
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void handleAccelerationPressureLoss(const int seg) const;
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// handling the overshooting and undershooting of the fractions
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void processFractions(const int seg) const;
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void updateWellStateFromPrimaryVariables(WellState& well_state) const;
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bool frictionalPressureLossConsidered() const;
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bool accelerationalPressureLossConsidered() const;
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// TODO: try to make ebosSimulator const, as it should be
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void iterateWellEquations(Simulator& ebosSimulator,
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const double dt,
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WellState& well_state);
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void assembleWellEqWithoutIteration(Simulator& ebosSimulator,
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const double dt,
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WellState& well_state,
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bool only_wells);
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};
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}
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#include "MultisegmentWell_impl.hpp"
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#endif // OPM_MULTISEGMENTWELL_HEADER_INCLUDED
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