/// @brief Computes saturation from surface volume
void computeSaturation(const BlackoilPropertiesInterface& props,
BlackoilState& state)
{
const int np = props.numPhases();
const int nc = props.numCells();
std::vector<double> allA(nc*np*np);
std::vector<int> allcells(nc);
for (int c = 0; c < nc; ++c) {
allcells[c] = c;
}
//std::vector<double> res_vol(np);
const std::vector<double>& z = state.surfacevol();
props.matrix(nc, &state.pressure()[0], &z[0], &allcells[0], &allA[0], 0);
// Linear solver.
MAT_SIZE_T n = np;
MAT_SIZE_T nrhs = 1;
MAT_SIZE_T lda = np;
std::vector<MAT_SIZE_T> piv(np);
MAT_SIZE_T ldb = np;
MAT_SIZE_T info = 0;
//double res_vol;
double tot_sat;
const double epsilon = std::sqrt(std::numeric_limits<double>::epsilon());
for (int c = 0; c < nc; ++c) {
double* A = &allA[c*np*np];
const double* z_loc = &z[c*np];
double* s = &state.saturation()[c*np];
for (int p = 0; p < np; ++p){
s[p] = z_loc[p];
}
dgesv_(&n, &nrhs, &A[0], &lda, &piv[0], &s[0], &ldb, &info);
tot_sat = 0;
for (int p = 0; p < np; ++p){
if (s[p] < epsilon) // saturation may be less then zero due to round of errors
s[p] = 0;
tot_sat += s[p];
}
for (int p = 0; p < np; ++p){
s[p] = s[p]/tot_sat;
}
}
}
/// Construct solver.
/// \param[in] grid A 2d or 3d grid.
/// \param[in] props Rock and fluid properties.
/// \param[in] linsolver Linear solver to use.
/// \param[in] residual_tol Solution accepted if inf-norm of residual is smaller.
/// \param[in] change_tol Solution accepted if inf-norm of change in pressure is smaller.
/// \param[in] maxiter Maximum acceptable number of iterations.
/// \param[in] gravity Gravity vector. If non-null, the array should
/// have D elements.
/// \param[in] wells The wells argument. Will be used in solution,
/// is ignored if NULL.
/// Note: this class observes the well object, and
/// makes the assumption that the well topology
/// and completions does not change during the
/// run. However, controls (only) are allowed
/// to change.
CompressibleTpfa::CompressibleTpfa(const UnstructuredGrid& grid,
const BlackoilPropertiesInterface& props,
const RockCompressibility* rock_comp_props,
const LinearSolverInterface& linsolver,
const double residual_tol,
const double change_tol,
const int maxiter,
const double* gravity,
const struct Wells* wells)
: grid_(grid),
props_(props),
rock_comp_props_(rock_comp_props),
linsolver_(linsolver),
residual_tol_(residual_tol),
change_tol_(change_tol),
maxiter_(maxiter),
gravity_(gravity),
wells_(wells),
htrans_(grid.cell_facepos[ grid.number_of_cells ]),
trans_ (grid.number_of_faces),
allcells_(grid.number_of_cells),
singular_(false)
{
if (wells_ && (wells_->number_of_phases != props.numPhases())) {
OPM_THROW(std::runtime_error, "Inconsistent number of phases specified (wells vs. props): "
<< wells_->number_of_phases << " != " << props.numPhases());
}
const int num_dofs = grid.number_of_cells + (wells ? wells->number_of_wells : 0);
pressure_increment_.resize(num_dofs);
UnstructuredGrid* gg = const_cast<UnstructuredGrid*>(&grid_);
tpfa_htrans_compute(gg, props.permeability(), &htrans_[0]);
tpfa_trans_compute(gg, &htrans_[0], &trans_[0]);
// If we have rock compressibility, pore volumes are updated
// in the compute*() methods, otherwise they are constant and
// hence may be computed here.
if (rock_comp_props_ == NULL || !rock_comp_props_->isActive()) {
computePorevolume(grid_, props.porosity(), porevol_);
}
for (int c = 0; c < grid.number_of_cells; ++c) {
allcells_[c] = c;
}
cfs_tpfa_res_wells w;
w.W = const_cast<struct Wells*>(wells_);
w.data = NULL;
h_ = cfs_tpfa_res_construct(gg, &w, props.numPhases());
}
/// @brief Computes injected and produced surface volumes of all phases.
/// Note 1: assumes that only the first phase is injected.
/// Note 2: assumes that transport has been done with an
/// implicit method, i.e. that the current state
/// gives the mobilities used for the preceding timestep.
/// Note 3: Gives surface volume values, not reservoir volumes
/// (as the incompressible version of the function does).
/// Also, assumes that transport_src is given in surface volumes
/// for injector terms!
/// @param[in] props fluid and rock properties.
/// @param[in] state state variables (pressure, sat, surfvol)
/// @param[in] transport_src if < 0: total resv outflow, if > 0: first phase surfv inflow
/// @param[in] dt timestep used
/// @param[out] injected must point to a valid array with P elements,
/// where P = s.size()/src.size().
/// @param[out] produced must also point to a valid array with P elements.
void computeInjectedProduced(const BlackoilPropertiesInterface& props,
const BlackoilState& state,
const std::vector<double>& transport_src,
const double dt,
double* injected,
double* produced)
{
const int num_cells = transport_src.size();
if (props.numCells() != num_cells) {
OPM_THROW(std::runtime_error, "Size of transport_src vector does not match number of cells in props.");
}
const int np = props.numPhases();
if (int(state.saturation().size()) != num_cells*np) {
OPM_THROW(std::runtime_error, "Sizes of state vectors do not match number of cells.");
}
const std::vector<double>& press = state.pressure();
const std::vector<double>& temp = state.temperature();
const std::vector<double>& s = state.saturation();
const std::vector<double>& z = state.surfacevol();
std::fill(injected, injected + np, 0.0);
std::fill(produced, produced + np, 0.0);
std::vector<double> visc(np);
std::vector<double> mob(np);
std::vector<double> A(np*np);
std::vector<double> prod_resv_phase(np);
std::vector<double> prod_surfvol(np);
for (int c = 0; c < num_cells; ++c) {
if (transport_src[c] > 0.0) {
// Inflowing transport source is a surface volume flux
// for the first phase.
injected[0] += transport_src[c]*dt;
} else if (transport_src[c] < 0.0) {
// Outflowing transport source is a total reservoir
// volume flux.
const double flux = -transport_src[c]*dt;
const double* sat = &s[np*c];
props.relperm(1, sat, &c, &mob[0], 0);
props.viscosity(1, &press[c], &temp[c], &z[np*c], &c, &visc[0], 0);
props.matrix(1, &press[c], &temp[c], &z[np*c], &c, &A[0], 0);
double totmob = 0.0;
for (int p = 0; p < np; ++p) {
mob[p] /= visc[p];
totmob += mob[p];
}
std::fill(prod_surfvol.begin(), prod_surfvol.end(), 0.0);
for (int p = 0; p < np; ++p) {
prod_resv_phase[p] = (mob[p]/totmob)*flux;
for (int q = 0; q < np; ++q) {
prod_surfvol[q] += prod_resv_phase[p]*A[q + np*p];
}
}
for (int p = 0; p < np; ++p) {
produced[p] += prod_surfvol[p];
}
}
}
}
void WellReport::push(const BlackoilPropertiesInterface& props,
const Wells& wells,
const std::vector<double>& p,
const std::vector<double>& z,
const std::vector<double>& s,
const double time,
const std::vector<double>& well_bhp,
const std::vector<double>& well_perfrates)
{
// TODO: refactor, since this is almost identical to the other push().
int nw = well_bhp.size();
assert(nw == wells.number_of_wells);
int np = props.numPhases();
const int max_np = 3;
if (np > max_np) {
OPM_THROW(std::runtime_error, "WellReport for now assumes #phases <= " << max_np);
}
std::vector<double> data_now;
data_now.reserve(1 + 3*nw);
data_now.push_back(time/unit::day);
for (int w = 0; w < nw; ++w) {
data_now.push_back(well_bhp[w]/(unit::barsa));
double well_rate_total = 0.0;
double well_rate_water = 0.0;
for (int perf = wells.well_connpos[w]; perf < wells.well_connpos[w + 1]; ++perf) {
const double perf_rate = unit::convert::to(well_perfrates[perf],
unit::cubic(unit::meter)/unit::day);
well_rate_total += perf_rate;
if (perf_rate > 0.0) {
// Injection.
well_rate_water += perf_rate*wells.comp_frac[0];
} else {
// Production.
const int cell = wells.well_cells[perf];
double mob[max_np];
props.relperm(1, &s[np*cell], &cell, mob, 0);
double visc[max_np];
props.viscosity(1, &p[cell], 0, &z[np*cell], &cell, visc, 0);
double tmob = 0;
for(int i = 0; i < np; ++i) {
mob[i] /= visc[i];
tmob += mob[i];
}
const double fracflow = mob[0]/(tmob);
well_rate_water += perf_rate*fracflow;
}
}
data_now.push_back(well_rate_total);
if (well_rate_total == 0.0) {
data_now.push_back(0.0);
} else {
data_now.push_back(well_rate_water/well_rate_total);
}
}
data_.push_back(data_now);
}
void initStateBasic(const UnstructuredGrid& grid,
const BlackoilPropertiesInterface& props,
const parameter::ParameterGroup& param,
const double gravity,
State& state)
{
// TODO: Refactor to exploit similarity with IncompProp* case.
const int num_phases = props.numPhases();
if (num_phases != 2) {
THROW("initStateTwophaseBasic(): currently handling only two-phase scenarios.");
}
state.init(grid, num_phases);
const int num_cells = props.numCells();
// By default: initialise water saturation to minimum everywhere.
std::vector<int> all_cells(num_cells);
for (int i = 0; i < num_cells; ++i) {
all_cells[i] = i;
}
state.setFirstSat(all_cells, props, State::MinSat);
const bool convection_testcase = param.getDefault("convection_testcase", false);
if (convection_testcase) {
// Initialise water saturation to max in the 'left' part.
std::vector<int> left_cells;
left_cells.reserve(num_cells/2);
const int *glob_cell = grid.global_cell;
const int* cd = grid.cartdims;
for (int cell = 0; cell < num_cells; ++cell) {
const int gc = glob_cell == 0 ? cell : glob_cell[cell];
bool left = (gc % cd[0]) < cd[0]/2;
if (left) {
left_cells.push_back(cell);
}
}
state.setFirstSat(left_cells, props, State::MaxSat);
const double init_p = param.getDefault("ref_pressure", 100.0)*unit::barsa;
std::fill(state.pressure().begin(), state.pressure().end(), init_p);
} else if (param.has("water_oil_contact")) {
// Warn against error-prone usage.
if (gravity == 0.0) {
std::cout << "**** Warning: running gravity convection scenario, but gravity is zero." << std::endl;
}
if (grid.cartdims[2] <= 1) {
std::cout << "**** Warning: running gravity convection scenario, which expects nz > 1." << std::endl;
}
// Initialise water saturation to max below water-oil contact.
const double woc = param.get<double>("water_oil_contact");
initWaterOilContact(grid, props, woc, WaterBelow, state);
// Initialise pressure to hydrostatic state.
const double ref_p = param.getDefault("ref_pressure", 100.0)*unit::barsa;
initHydrostaticPressure(grid, props, woc, gravity, woc, ref_p, state);
} else {
// Use default: water saturation is minimum everywhere.
// Initialise pressure to hydrostatic state.
const double ref_p = param.getDefault("ref_pressure", 100.0)*unit::barsa;
const double ref_z = grid.cell_centroids[0 + grid.dimensions - 1];
const double woc = -1e100;
initHydrostaticPressure(grid, props, woc, gravity, ref_z, ref_p, state);
}
// Finally, init face pressures.
initFacePressure(grid, state);
}
/// @brief Computes injected and produced volumes of all phases,
/// and injected and produced polymer mass - in the compressible case.
/// Note 1: assumes that only the first phase is injected.
/// Note 2: assumes that transport has been done with an
/// implicit method, i.e. that the current state
/// gives the mobilities used for the preceding timestep.
/// @param[in] props fluid and rock properties.
/// @param[in] polyprops polymer properties
/// @param[in] state state variables (pressure, fluxes etc.)
/// @param[in] transport_src if < 0: total reservoir volume outflow,
/// if > 0: first phase *surface volume* inflow.
/// @param[in] inj_c injected concentration by cell
/// @param[in] dt timestep used
/// @param[out] injected must point to a valid array with P elements,
/// where P = s.size()/transport_src.size().
/// @param[out] produced must also point to a valid array with P elements.
/// @param[out] polyinj injected mass of polymer
/// @param[out] polyprod produced mass of polymer
void computeInjectedProduced(const BlackoilPropertiesInterface& props,
const Opm::PolymerProperties& polyprops,
const PolymerBlackoilState& state,
const std::vector<double>& transport_src,
const std::vector<double>& inj_c,
const double dt,
double* injected,
double* produced,
double& polyinj,
double& polyprod)
{
const int num_cells = transport_src.size();
if (props.numCells() != num_cells) {
OPM_THROW(std::runtime_error, "Size of transport_src vector does not match number of cells in props.");
}
const int np = props.numPhases();
if (int(state.saturation().size()) != num_cells*np) {
OPM_THROW(std::runtime_error, "Sizes of state vectors do not match number of cells.");
}
const std::vector<double>& press = state.pressure();
const std::vector<double>& temp = state.temperature();
const std::vector<double>& s = state.saturation();
const std::vector<double>& z = state.surfacevol();
const std::vector<double>& c = state.getCellData( state.CONCENTRATION );
const std::vector<double>& cmax = state.getCellData( state.CMAX );
std::fill(injected, injected + np, 0.0);
std::fill(produced, produced + np, 0.0);
polyinj = 0.0;
polyprod = 0.0;
std::vector<double> visc(np);
std::vector<double> kr_cell(np);
std::vector<double> mob(np);
std::vector<double> A(np*np);
std::vector<double> prod_resv_phase(np);
std::vector<double> prod_surfvol(np);
double mc;
for (int cell = 0; cell < num_cells; ++cell) {
if (transport_src[cell] > 0.0) {
// Inflowing transport source is a surface volume flux
// for the first phase.
injected[0] += transport_src[cell]*dt;
polyinj += transport_src[cell]*dt*inj_c[cell];
} else if (transport_src[cell] < 0.0) {
// Outflowing transport source is a total reservoir
// volume flux.
const double flux = -transport_src[cell]*dt;
const double* sat = &s[np*cell];
props.relperm(1, sat, &cell, &kr_cell[0], 0);
props.viscosity(1, &press[cell], &temp[cell], &z[np*cell], &cell, &visc[0], 0);
props.matrix(1, &press[cell], &temp[cell], &z[np*cell], &cell, &A[0], 0);
polyprops.effectiveMobilities(c[cell], cmax[cell], &visc[0],
&kr_cell[0], &mob[0]);
double totmob = 0.0;
for (int p = 0; p < np; ++p) {
totmob += mob[p];
}
std::fill(prod_surfvol.begin(), prod_surfvol.end(), 0.0);
for (int p = 0; p < np; ++p) {
prod_resv_phase[p] = (mob[p]/totmob)*flux;
for (int q = 0; q < np; ++q) {
prod_surfvol[q] += prod_resv_phase[p]*A[q + np*p];
}
}
for (int p = 0; p < np; ++p) {
produced[p] += prod_surfvol[p];
}
polyprops.computeMc(c[cell], mc);
polyprod += produced[0]*mc;
}
}
}