/// Compute two-phase transport source terms from well terms.
/// Note: Unlike the incompressible version of this function,
/// this version computes surface volume injection rates,
/// production rates are still total reservoir volumes.
/// \param[in] props Fluid and rock properties.
/// \param[in] wells Wells data structure.
/// \param[in] well_state Well pressures and fluxes.
/// \param[out] transport_src The transport source terms. They are to be interpreted depending on sign:
/// (+) positive inflow of first (water) phase (surface volume),
/// (-) negative total outflow of both phases (reservoir volume).
void computeTransportSource(const BlackoilPropertiesInterface& props,
const Wells* wells,
const WellState& well_state,
std::vector<double>& transport_src)
{
int nc = props.numCells();
transport_src.clear();
transport_src.resize(nc, 0.0);
// Well contributions.
if (wells) {
const int nw = wells->number_of_wells;
const int np = wells->number_of_phases;
if (np != 2) {
OPM_THROW(std::runtime_error, "computeTransportSource() requires a 2 phase case.");
}
std::vector<double> A(np*np);
for (int w = 0; w < nw; ++w) {
const double* comp_frac = wells->comp_frac + np*w;
for (int perf = wells->well_connpos[w]; perf < wells->well_connpos[w + 1]; ++perf) {
const int perf_cell = wells->well_cells[perf];
double perf_rate = well_state.perfRates()[perf];
if (perf_rate > 0.0) {
// perf_rate is a total inflow reservoir rate, we want a surface water rate.
if (wells->type[w] != INJECTOR) {
std::cout << "**** Warning: crossflow in well "
<< w << " perf " << perf - wells->well_connpos[w]
<< " ignored. Reservoir rate was "
<< perf_rate/Opm::unit::day << " m^3/day." << std::endl;
perf_rate = 0.0;
} else {
assert(std::fabs(comp_frac[0] + comp_frac[1] - 1.0) < 1e-6);
perf_rate *= comp_frac[0]; // Water reservoir volume rate.
props.matrix(1, &well_state.perfPress()[perf], comp_frac, &perf_cell, &A[0], 0);
perf_rate *= A[0]; // Water surface volume rate.
}
}
transport_src[perf_cell] += perf_rate;
}
}
}
}
/// @brief Computes total absorbed polymer mass over all grid cells.
/// With compressibility
/// @param[in] grid grid
/// @param[in] props fluid and rock properties.
/// @param[in] polyprops polymer properties
/// @param[in] state fluid state variable
/// @param[in] rock_comp rock compressibility (depends on pressure)
/// @return total absorbed polymer mass.
double computePolymerAdsorbed(const UnstructuredGrid& grid,
const BlackoilPropertiesInterface& props,
const Opm::PolymerProperties& polyprops,
const PolymerBlackoilState& state,
const RockCompressibility* rock_comp
)
{
const int num_cells = props.numCells();
const double rhor = polyprops.rockDensity();
std::vector<double> porosity;
if (rock_comp && rock_comp->isActive()) {
computePorosity(grid, props.porosity(), *rock_comp, state.pressure(), porosity);
} else {
porosity.assign(props.porosity(), props.porosity() + num_cells);
}
double abs_mass = 0.0;
const std::vector<double>& cmax = state.getCellData( state.CMAX );
for (int cell = 0; cell < num_cells; ++cell) {
double c_ads;
polyprops.simpleAdsorption(cmax[cell], c_ads);
abs_mass += c_ads*grid.cell_volumes[cell]*(1.0 - porosity[cell])*rhor;
}
return abs_mass;
}
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);
}
/// Constructor wrapping an opm-core black oil interface.
BlackoilPropsAd::BlackoilPropsAd(const BlackoilPropertiesInterface& props)
: props_(props),
pu_(props.phaseUsage())
{
}
/// @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;
}
}
}