OilfieldToolsNet/opm-simulators
4
0
Fork 0
mirror of https://github.com/OPM/opm-simulators.git synced 2024-12-26 17:20:59 -06:00
Code Issues Packages Projects Releases Wiki Activity

Refactor out the solving algorithm of bhp from thp via VFP to make it usable for injectors

Browse Source
This commit is contained in:
Tor Harald Sandve 2022-02-09 10:49:17 +01:00
parent 1001d35418
commit ec08f80405
2 changed files with 37 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
opm/simulators/wells/WellInterfaceGeneric.cpp
View File

@ -649,13 +649,39 @@ computeBhpAtThpLimitProdCommon(const std::function<std::vector<double>(const dou
"find bhp-point where production becomes non-zero for well " + this->name());
return std::nullopt;
}
const std::array<double, 2> range {controls.bhp_limit, *bhp_max};
return computeBhpAtThpLimitCommon(frates, fbhp, range, deferred_logger);
}
std::optional<double>
WellInterfaceGeneric::
computeBhpAtThpLimitCommon(const std::function<std::vector<double>(const double)>& frates,
const std::function<double(const std::vector<double>)>& fbhp,
const std::array<double, 2> range,
DeferredLogger& deferred_logger) const
{
// Given a VFP function returning bhp as a function of phase
// rates and thp:
// fbhp(rates, thp),
// a function extracting the particular flow rate used for VFP
// lookups:
// flo(rates)
// and the inflow function (assuming the reservoir is fixed):
// frates(bhp)
// we want to solve the equation:
// fbhp(frates(bhp, thplimit)) - bhp = 0
// for bhp.
//
// This may result in 0, 1 or 2 solutions. If two solutions,
// the one corresponding to the lowest bhp (and therefore
// highest rate) should be returned.
// Define the equation we want to solve.
auto eq = [&fbhp, &frates](double bhp) {
return fbhp(frates(bhp)) - bhp;
};
// Find appropriate brackets for the solution.
const std::array<double, 2> range {controls.bhp_limit, *bhp_max};
std::optional<double> approximate_solution;
double low, high;
// trying to use bisect way to locate a bracket

10
opm/simulators/wells/WellInterfaceGeneric.hpp
View File

@ -184,6 +184,9 @@ public:
const double alq_value,
DeferredLogger& deferred_logger
) const;
protected:
bool getAllowCrossFlow() const;
double mostStrictBhpFromBhpLimits(const SummaryState& summaryState) const;
@ -198,6 +201,13 @@ protected:
const double vfp_flo_front,
DeferredLogger& deferred_logger) const;
std::optional<double> computeBhpAtThpLimitCommon(
const std::function<std::vector<double>(const double)>& frates,
const std::function<double(const std::vector<double>)>& fbhp,
const std::array<double, 2> range,
DeferredLogger& deferred_logger) const;
bool bruteForceBracket(const std::function<double(const double)>& eq,
const std::array<double, 2>& range,
double& low, double& high,