Add support for Reservoir Grid Ensembles

Introduce RimReservoirGridEnsemble and RimReservoirGridEnsembleBase to manage ensembles of grid-only Eclipse cases. Enable detection of identical grids for shared operations and statistics. Integrate grid ensembles into project structure, UI, and menu system. Refactor statistics and view handling to support both case groups and grid ensembles via a common interface. Add deferred grid loading, robust case referencing, and migration for well data source fields. New features and menu items allow creation and management of grid ensembles from file sets, enabling new workflows for grid-only ensemble analysis.

ApplicationLibCode/ProjectDataModel/RimProject.cpp

@@ -75,6 +75,7 @@
 #include "RimPlotWindow.h"
 #include "RimPltPlotCollection.h"
 #include "RimPolylinesFromFileAnnotation.h"
+#include "RimReservoirGridEnsemble.h"
 #include "RimRftPlotCollection.h"
 #include "RimSaturationPressurePlotCollection.h"
 #include "RimScriptCollection.h"
@@ -716,6 +717,30 @@ void RimProject::assignIdToCaseGroup( RimIdenticalGridCaseGroup* caseGroup )
     }
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimProject::assignIdToCaseGroup( RimReservoirGridEnsemble* gridEnsemble )
+{
+    if ( gridEnsemble )
+    {
+        std::vector<RimIdenticalGridCaseGroup*> identicalCaseGroups = descendantsIncludingThisOfType<RimIdenticalGridCaseGroup>();
+        std::vector<RimReservoirGridEnsemble*>  gridEnsembles       = descendantsIncludingThisOfType<RimReservoirGridEnsemble>();
+
+        for ( RimIdenticalGridCaseGroup* existingCaseGroup : identicalCaseGroups )
+        {
+            m_nextValidCaseGroupId = std::max( m_nextValidCaseGroupId, existingCaseGroup->groupId() + 1 );
+        }
+
+        for ( RimReservoirGridEnsemble* existingEnsemble : gridEnsembles )
+        {
+            m_nextValidCaseGroupId = std::max( m_nextValidCaseGroupId, existingEnsemble->groupId() + 1 );
+        }
+
+        gridEnsemble->setGroupId( m_nextValidCaseGroupId++ );
+    }
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
@@ -1507,6 +1532,7 @@ void RimProject::defineUiTreeOrdering( caf::PdmUiTreeOrdering& uiTreeOrdering, Q
         {
             if ( oilField->analysisModels() ) uiTreeOrdering.add( oilField->analysisModels() );
         }
+        uiTreeOrdering.add( &m_ensembleFileSetCollection );
     }
     else
     {