ResInsight/ApplicationLibCode/ReservoirDataModel/RigWellTargetCandidatesGenerator.cpp

604 lines
32 KiB
C++

/////////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2024- Equinor ASA
//
// ResInsight is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.
//
// See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
// for more details.
//
/////////////////////////////////////////////////////////////////////////////////
#include "RigWellTargetCandidatesGenerator.h"
#include "RiaLogging.h"
#include "RiaPorosityModel.h"
#include "RiaResultNames.h"
#include "RiaWeightedMeanCalculator.h"
#include "RigActiveCellInfo.h"
#include "RigCaseCellResultsData.h"
#include "RigEclipseResultAddress.h"
#include "RigMainGrid.h"
#include "RimEclipseCase.h"
#include "RimEclipseCaseEnsemble.h"
#include "RimEclipseView.h"
#include "RimProject.h"
#include "RimPropertyFilterCollection.h"
#include "RimTools.h"
#include "cafVecIjk.h"
#include "cvfMath.h"
#include "cvfStructGrid.h"
#include <cmath>
#include <limits>
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RigWellTargetCandidatesGenerator::generateCandidates( RimEclipseCase* eclipseCase,
size_t timeStepIdx,
VolumeType volumeType,
VolumesType volumesType,
VolumeResultType volumeResultType,
const ClusteringLimits& limits )
{
auto activeCellCount = getActiveCellCount( eclipseCase );
if ( !activeCellCount )
{
RiaLogging::error( "No active cells found" );
return;
}
auto resultsData = eclipseCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL );
if ( !resultsData ) return;
std::vector<double> volume = getVolumeVector( *resultsData, volumeType, volumesType, volumeResultType, timeStepIdx );
if ( volume.empty() )
{
RiaLogging::error( "Unable to produce volume vector." );
return;
}
RigEclipseResultAddress pressureAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, "PRESSURE" );
resultsData->ensureKnownResultLoaded( pressureAddress );
const std::vector<double>& pressure = resultsData->cellScalarResults( pressureAddress, timeStepIdx );
RigEclipseResultAddress permeabilityXAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "PERMX" );
resultsData->ensureKnownResultLoaded( permeabilityXAddress );
const std::vector<double>& permeabilityX = resultsData->cellScalarResults( permeabilityXAddress, 0 );
RigEclipseResultAddress permeabilityYAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "PERMY" );
resultsData->ensureKnownResultLoaded( permeabilityYAddress );
const std::vector<double>& permeabilityY = resultsData->cellScalarResults( permeabilityYAddress, 0 );
RigEclipseResultAddress permeabilityZAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "PERMZ" );
resultsData->ensureKnownResultLoaded( permeabilityZAddress );
const std::vector<double>& permeabilityZ = resultsData->cellScalarResults( permeabilityZAddress, 0 );
RigEclipseResultAddress transmissibilityXAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "TRANX" );
resultsData->ensureKnownResultLoaded( transmissibilityXAddress );
const std::vector<double>& transmissibilityX = resultsData->cellScalarResults( transmissibilityXAddress, 0 );
RigEclipseResultAddress transmissibilityYAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "TRANY" );
resultsData->ensureKnownResultLoaded( transmissibilityYAddress );
const std::vector<double>& transmissibilityY = resultsData->cellScalarResults( transmissibilityYAddress, 0 );
RigEclipseResultAddress transmissibilityZAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "TRANZ" );
resultsData->ensureKnownResultLoaded( transmissibilityZAddress );
const std::vector<double>& transmissibilityZ = resultsData->cellScalarResults( transmissibilityZAddress, 0 );
std::vector<int> clusters( activeCellCount.value(), 0 );
auto start = std::chrono::high_resolution_clock::now();
int numClusters = limits.maxClusters;
int maxIterations = limits.maxIterations;
int numClustersFound = 0;
for ( int clusterId = 1; clusterId <= numClusters; clusterId++ )
{
std::optional<caf::VecIjk> startCell = findStartCell( eclipseCase,
timeStepIdx,
limits,
volume,
pressure,
permeabilityX,
permeabilityY,
permeabilityZ,
transmissibilityX,
transmissibilityY,
transmissibilityZ,
clusters );
if ( startCell.has_value() )
{
RiaLogging::info( QString( "Cluster %1 start cell: [%2 %3 %4] " )
.arg( clusterId )
.arg( startCell->i() + 1 )
.arg( startCell->j() + 1 )
.arg( startCell->k() + 1 ) );
growCluster( eclipseCase,
startCell.value(),
limits,
volume,
pressure,
permeabilityX,
permeabilityY,
permeabilityZ,
transmissibilityX,
transmissibilityY,
transmissibilityZ,
clusters,
clusterId,
timeStepIdx,
maxIterations );
numClustersFound++;
}
else
{
RiaLogging::error( "No suitable starting cell found" );
break;
}
}
RiaLogging::info( QString( "Found %1 clusters." ).arg( numClustersFound ) );
auto finish = std::chrono::high_resolution_clock::now();
auto milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>( finish - start );
RiaLogging::info( QString( "Time spent: %1 ms" ).arg( milliseconds.count() ) );
QString resultName = "CLUSTERS_NUM";
createResultVector( *eclipseCase, resultName, clusters );
// Update views and property filters
RimProject* proj = RimProject::current();
proj->scheduleCreateDisplayModelAndRedrawAllViews();
for ( auto view : eclipseCase->reservoirViews() )
{
if ( auto eclipseView = dynamic_cast<RimEclipseView*>( view ) )
{
eclipseView->scheduleReservoirGridGeometryRegen();
eclipseView->propertyFilterCollection()->updateConnectedEditors();
}
}
std::vector<ClusterStatistics> statistics =
generateStatistics( eclipseCase, pressure, permeabilityX, permeabilityY, permeabilityZ, numClustersFound, timeStepIdx, resultName );
for ( auto s : statistics )
{
RiaLogging::info( QString( "Cluster #%1 Statistics" ).arg( s.id ) );
RiaLogging::info( QString( "Number of cells: %1" ).arg( s.numCells ) );
RiaLogging::info( QString( "Total PORV*SOIL: %1" ).arg( s.totalPorvSoil ) );
RiaLogging::info( QString( "Total PORV*SGAS: %1" ).arg( s.totalPorvSgas ) );
RiaLogging::info( QString( "Total PORV*(SOIL+SGAS): %1" ).arg( s.totalPorvSoilAndSgas ) );
RiaLogging::info( QString( "Total FIPOIL: %1" ).arg( s.totalFipOil ) );
RiaLogging::info( QString( "Total FIPGAS: %1" ).arg( s.totalFipGas ) );
RiaLogging::info( QString( "Average Permeability: %1" ).arg( s.permeability ) );
RiaLogging::info( QString( "Average Pressure: %1" ).arg( s.pressure ) );
}
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::optional<caf::VecIjk> RigWellTargetCandidatesGenerator::findStartCell( RimEclipseCase* eclipseCase,
size_t timeStepIdx,
const ClusteringLimits& limits,
const std::vector<double>& volume,
const std::vector<double>& pressure,
const std::vector<double>& permeabilityX,
const std::vector<double>& permeabilityY,
const std::vector<double>& permeabilityZ,
const std::vector<double>& transmissibilityX,
const std::vector<double>& transmissibilityY,
const std::vector<double>& transmissibilityZ,
const std::vector<int>& clusters )
{
auto resultsData = eclipseCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL );
if ( !resultsData )
{
RiaLogging::error( "No results data found for eclipse case" );
return {};
}
size_t startCell = std::numeric_limits<size_t>::max();
double maxVolume = -std::numeric_limits<double>::max();
const size_t numReservoirCells = resultsData->activeCellInfo()->reservoirCellCount();
for ( size_t reservoirCellIdx = 0; reservoirCellIdx < numReservoirCells; reservoirCellIdx++ )
{
size_t resultIndex = resultsData->activeCellInfo()->cellResultIndex( reservoirCellIdx );
if ( resultIndex != cvf::UNDEFINED_SIZE_T && clusters[resultIndex] == 0 )
{
const double cellVolume = volume[resultIndex];
const double cellPressure = pressure[resultIndex];
const double cellPermeabiltyX = permeabilityX[resultIndex];
const double cellPermeabiltyY = permeabilityY[resultIndex];
const double cellPermeabiltyZ = permeabilityZ[resultIndex];
const bool permeabilityValidInAnyDirection = ( cellPermeabiltyX >= limits.permeability || cellPermeabiltyY >= limits.permeability ||
cellPermeabiltyZ >= limits.permeability );
if ( cellVolume > maxVolume && cellVolume >= limits.volume && cellPressure >= limits.pressure && permeabilityValidInAnyDirection )
{
maxVolume = cellVolume;
startCell = reservoirCellIdx;
}
}
}
if ( startCell == std::numeric_limits<size_t>::max() ) return {};
return eclipseCase->mainGrid()->ijkFromCellIndex( startCell );
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RigWellTargetCandidatesGenerator::growCluster( RimEclipseCase* eclipseCase,
const caf::VecIjk& startCell,
const ClusteringLimits& limits,
const std::vector<double>& volume,
const std::vector<double>& pressure,
const std::vector<double>& permeabilityX,
const std::vector<double>& permeabilityY,
const std::vector<double>& permeabilityZ,
const std::vector<double>& transmissibilityX,
const std::vector<double>& transmissibilityY,
const std::vector<double>& transmissibilityZ,
std::vector<int>& clusters,
int clusterId,
size_t timeStepIdx,
int maxIterations )
{
auto resultsData = eclipseCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL );
// Initially only the start cell is found
size_t reservoirCellIdx = eclipseCase->mainGrid()->cellIndexFromIJK( startCell.i(), startCell.j(), startCell.k() );
std::vector<size_t> foundCells = { reservoirCellIdx };
assignClusterIdToCells( *resultsData->activeCellInfo(), foundCells, clusters, clusterId );
for ( int i = 0; i < maxIterations; i++ )
{
foundCells = findCandidates( *eclipseCase,
foundCells,
limits,
volume,
pressure,
permeabilityX,
permeabilityY,
permeabilityZ,
transmissibilityX,
transmissibilityY,
transmissibilityZ,
clusters );
if ( foundCells.empty() ) break;
assignClusterIdToCells( *resultsData->activeCellInfo(), foundCells, clusters, clusterId );
}
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<size_t> RigWellTargetCandidatesGenerator::findCandidates( const RimEclipseCase& eclipseCase,
const std::vector<size_t>& previousCells,
const ClusteringLimits& limits,
const std::vector<double>& volume,
const std::vector<double>& pressure,
const std::vector<double>& permeabilityX,
const std::vector<double>& permeabilityY,
const std::vector<double>& permeabilityZ,
const std::vector<double>& transmissibilityX,
const std::vector<double>& transmissibilityY,
const std::vector<double>& transmissibilityZ,
std::vector<int>& clusters )
{
std::vector<size_t> candidates;
auto resultsData = eclipseCase.results( RiaDefines::PorosityModelType::MATRIX_MODEL );
for ( size_t cellIdx : previousCells )
{
std::vector<cvf::StructGridInterface::FaceType> faces = {
cvf::StructGridInterface::FaceType::POS_I,
cvf::StructGridInterface::FaceType::NEG_I,
cvf::StructGridInterface::FaceType::POS_J,
cvf::StructGridInterface::FaceType::NEG_J,
cvf::StructGridInterface::FaceType::POS_K,
cvf::StructGridInterface::FaceType::NEG_K,
};
size_t resultIndex = resultsData->activeCellInfo()->cellResultIndex( cellIdx );
for ( cvf::StructGridInterface::FaceType face : faces )
{
const RigCell& nativeCell = eclipseCase.mainGrid()->globalCellArray()[cellIdx];
RigGridBase* grid = nativeCell.hostGrid();
size_t gridLocalNativeCellIndex = nativeCell.gridLocalCellIndex();
size_t i, j, k, gridLocalNeighborCellIdx;
grid->ijkFromCellIndex( gridLocalNativeCellIndex, &i, &j, &k );
if ( grid->cellIJKNeighbor( i, j, k, face, &gridLocalNeighborCellIdx ) )
{
size_t neighborResvCellIdx = grid->reservoirCellIndex( gridLocalNeighborCellIdx );
size_t neighborResultIndex = resultsData->activeCellInfo()->cellResultIndex( neighborResvCellIdx );
if ( neighborResultIndex != cvf::UNDEFINED_SIZE_T && clusters[neighborResultIndex] == 0 )
{
double permeability = getValueForFace( permeabilityX, permeabilityY, permeabilityZ, face, neighborResultIndex );
double transmissibility = getTransmissibilityValueForFace( transmissibilityX,
transmissibilityY,
transmissibilityZ,
face,
resultIndex,
neighborResultIndex );
if ( volume[neighborResultIndex] > limits.volume && pressure[neighborResultIndex] > limits.pressure &&
permeability > limits.permeability && transmissibility > limits.transmissibility )
{
candidates.push_back( neighborResvCellIdx );
clusters[neighborResultIndex] = -1;
}
}
}
}
}
return candidates;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RigWellTargetCandidatesGenerator::assignClusterIdToCells( const RigActiveCellInfo& activeCellInfo,
const std::vector<size_t>& cells,
std::vector<int>& clusters,
int clusterId )
{
for ( size_t reservoirCellIdx : cells )
{
size_t resultIndex = activeCellInfo.cellResultIndex( reservoirCellIdx );
if ( resultIndex != cvf::UNDEFINED_SIZE_T ) clusters[resultIndex] = clusterId;
}
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RigWellTargetCandidatesGenerator::createResultVector( RimEclipseCase& eclipseCase,
const QString& resultName,
const std::vector<int>& clusterIds )
{
RigEclipseResultAddress resultAddress( RiaDefines::ResultCatType::GENERATED, resultName );
auto resultsData = eclipseCase.results( RiaDefines::PorosityModelType::MATRIX_MODEL );
resultsData->addStaticScalarResult( RiaDefines::ResultCatType::GENERATED, resultName, false, clusterIds.size() );
std::vector<double>* resultVector = resultsData->modifiableCellScalarResult( resultAddress, 0 );
resultVector->resize( clusterIds.size(), std::numeric_limits<double>::infinity() );
std::fill( resultVector->begin(), resultVector->end(), std::numeric_limits<double>::infinity() );
for ( size_t idx = 0; idx < clusterIds.size(); idx++ )
{
if ( clusterIds[idx] > 0 )
{
resultVector->at( idx ) = clusterIds[idx];
}
}
resultsData->recalculateStatistics( resultAddress );
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::optional<size_t> RigWellTargetCandidatesGenerator::getActiveCellCount( RimEclipseCase* eclipseCase )
{
auto resultsData = eclipseCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL );
if ( !resultsData ) return {};
return resultsData->activeCellInfo()->reservoirActiveCellCount();
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
double RigWellTargetCandidatesGenerator::getValueForFace( const std::vector<double>& x,
const std::vector<double>& y,
const std::vector<double>& z,
cvf::StructGridInterface::FaceType face,
size_t resultIndex )
{
if ( face == cvf::StructGridInterface::FaceType::POS_I || face == cvf::StructGridInterface::FaceType::NEG_I ) return x[resultIndex];
if ( face == cvf::StructGridInterface::FaceType::POS_J || face == cvf::StructGridInterface::FaceType::NEG_J ) return y[resultIndex];
if ( face == cvf::StructGridInterface::FaceType::POS_K || face == cvf::StructGridInterface::FaceType::NEG_K ) return z[resultIndex];
return std::numeric_limits<double>::infinity();
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
double RigWellTargetCandidatesGenerator::getTransmissibilityValueForFace( const std::vector<double>& x,
const std::vector<double>& y,
const std::vector<double>& z,
cvf::StructGridInterface::FaceType face,
size_t resultIndex,
size_t neighborResultIndex )
{
// For negative directions (NEG_I, NEG_J, NEG_K) use the value from the neighbor cell
bool isPos = face == cvf::StructGridInterface::FaceType::POS_I || face == cvf::StructGridInterface::FaceType::POS_J ||
face == cvf::StructGridInterface::FaceType::POS_K;
size_t index = isPos ? resultIndex : neighborResultIndex;
return getValueForFace( x, y, z, face, index );
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<double> RigWellTargetCandidatesGenerator::getVolumeVector( RigCaseCellResultsData& resultsData,
VolumeType volumeType,
VolumesType volumesType,
VolumeResultType volumeResultType,
size_t timeStepIdx )
{
auto loadVectorByName = []( RigCaseCellResultsData& resultsData, const QString& resultName, size_t timeStepIdx ) -> std::vector<double>
{
RigEclipseResultAddress address( RiaDefines::ResultCatType::DYNAMIC_NATIVE, resultName );
if ( !resultsData.ensureKnownResultLoaded( address ) ) return {};
return resultsData.cellScalarResults( address, timeStepIdx );
};
auto getOilVectorName = []( VolumesType volumesType ) -> QString
{
switch ( volumesType )
{
case VolumesType::COMPUTED_VOLUMES:
return RiaResultNames::riPorvSoil();
case VolumesType::RESERVOIR_VOLUMES:
return "RFIPOIL";
case VolumesType::SURFACE_VOLUMES:
return "SFIPOIL";
default:
{
CAF_ASSERT( false );
return "";
}
}
};
auto getGasVectorName = []( VolumesType volumesType ) -> QString
{
switch ( volumesType )
{
case VolumesType::COMPUTED_VOLUMES:
return RiaResultNames::riPorvSgas();
case VolumesType::RESERVOIR_VOLUMES:
return "RFIPGAS";
case VolumesType::SURFACE_VOLUMES:
return "SFIPGAS";
default:
{
CAF_ASSERT( false );
return "";
}
}
};
std::vector<double> volume;
if ( volumeType == VolumeType::OIL )
{
volume = loadVectorByName( resultsData, getOilVectorName( volumesType ), timeStepIdx );
}
else if ( volumeType == VolumeType::GAS )
{
volume = loadVectorByName( resultsData, getGasVectorName( volumesType ), timeStepIdx );
}
else if ( volumeType == VolumeType::HYDROCARBON )
{
std::vector<double> oilVolume = loadVectorByName( resultsData, getOilVectorName( volumesType ), timeStepIdx );
std::vector<double> gasVolume = loadVectorByName( resultsData, getGasVectorName( volumesType ), timeStepIdx );
if ( oilVolume.empty() || gasVolume.empty() || oilVolume.size() != gasVolume.size() ) return volume;
volume.resize( oilVolume.size(), std::numeric_limits<double>::infinity() );
for ( size_t i = 0; i < oilVolume.size(); i++ )
{
volume[i] = oilVolume[i] + gasVolume[i];
}
}
return volume;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<RigWellTargetCandidatesGenerator::ClusterStatistics>
RigWellTargetCandidatesGenerator::generateStatistics( RimEclipseCase* eclipseCase,
const std::vector<double>& pressure,
const std::vector<double>& permeabilityX,
const std::vector<double>& permeabilityY,
const std::vector<double>& permeabilityZ,
int numClustersFound,
size_t timeStepIdx,
const QString& clusterResultName )
{
std::vector<ClusterStatistics> statistics( numClustersFound );
auto resultsData = eclipseCase->results( RiaDefines::PorosityModelType::MATRIX_MODEL );
if ( !resultsData ) return statistics;
RigEclipseResultAddress porvAddress( RiaDefines::ResultCatType::STATIC_NATIVE, "PORV" );
resultsData->ensureKnownResultLoaded( porvAddress );
const std::vector<double>& porv = resultsData->cellScalarResults( porvAddress, 0 );
RigEclipseResultAddress porvSoilAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, RiaResultNames::riPorvSoil() );
resultsData->ensureKnownResultLoaded( porvSoilAddress );
const std::vector<double>& porvSoil = resultsData->cellScalarResults( porvSoilAddress, timeStepIdx );
RigEclipseResultAddress porvSgasAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, RiaResultNames::riPorvSgas() );
resultsData->ensureKnownResultLoaded( porvSgasAddress );
const std::vector<double>& porvSgas = resultsData->cellScalarResults( porvSgasAddress, timeStepIdx );
RigEclipseResultAddress porvSoilAndSgasAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, RiaResultNames::riPorvSoilSgas() );
resultsData->ensureKnownResultLoaded( porvSoilAndSgasAddress );
const std::vector<double>& porvSoilAndSgas = resultsData->cellScalarResults( porvSoilAndSgasAddress, timeStepIdx );
RigEclipseResultAddress fipOilAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, "FIPOIL" );
resultsData->ensureKnownResultLoaded( fipOilAddress );
const std::vector<double>& fipOil = resultsData->cellScalarResults( fipOilAddress, timeStepIdx );
RigEclipseResultAddress fipGasAddress( RiaDefines::ResultCatType::DYNAMIC_NATIVE, "FIPGAS" );
resultsData->ensureKnownResultLoaded( fipGasAddress );
const std::vector<double>& fipGas = resultsData->cellScalarResults( fipGasAddress, timeStepIdx );
RigEclipseResultAddress clusterAddress( RiaDefines::ResultCatType::GENERATED, clusterResultName );
resultsData->ensureKnownResultLoaded( clusterAddress );
const std::vector<double>& clusterIds = resultsData->cellScalarResults( clusterAddress, 0 );
std::vector<RiaWeightedMeanCalculator<double>> permeabilityCalculators( numClustersFound );
std::vector<RiaWeightedMeanCalculator<double>> pressureCalculators( numClustersFound );
for ( size_t idx = 0; idx < clusterIds.size(); idx++ )
{
if ( !std::isinf( clusterIds[idx] ) && static_cast<int>( clusterIds[idx] ) > 0 )
{
size_t i = clusterIds[idx] - 1;
if ( i < static_cast<size_t>( numClustersFound ) )
{
statistics[i].id = clusterIds[idx];
statistics[i].numCells++;
statistics[i].totalPorvSoil += porvSoil[idx];
statistics[i].totalPorvSgas += porvSgas[idx];
statistics[i].totalPorvSoilAndSgas += porvSoilAndSgas[idx];
statistics[i].totalFipOil += fipOil[idx];
statistics[i].totalFipGas += fipGas[idx];
double meanPermeability = ( permeabilityX[idx] + permeabilityY[idx] + permeabilityZ[idx] ) / 3.0;
permeabilityCalculators[i].addValueAndWeight( meanPermeability, porv[idx] );
pressureCalculators[i].addValueAndWeight( pressure[idx], porv[idx] );
}
}
}
for ( int i = 0; i < numClustersFound; i++ )
{
statistics[i].permeability = permeabilityCalculators[i].weightedMean();
statistics[i].pressure = pressureCalculators[i].weightedMean();
}
return statistics;
}